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RSS2003 Vol. 27, No. 3
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2003, 27(3): 161-165.
[Abstract]
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Abstract:
In the paper,the development of high-power fiber lasers is briefly introduced.Then the capabilities of double-cladding fiber laser weapons are analyzed in detail.Finally the advanced fiber laser technique to acquire high-energy single-mode laser output is presented.
In the paper,the development of high-power fiber lasers is briefly introduced.Then the capabilities of double-cladding fiber laser weapons are analyzed in detail.Finally the advanced fiber laser technique to acquire high-energy single-mode laser output is presented.
2003, 27(3): 166-167.
Abstract:
A 75kW pulse laser power supply platform which suits laser jointing and laser incision etc is expatiated.The user can set the four parameters (working frequency,pulse width,the amplitude of output voltage and over-current protection critical magnitude) through digital keyboard.It can be handled easily and used widely.
A 75kW pulse laser power supply platform which suits laser jointing and laser incision etc is expatiated.The user can set the four parameters (working frequency,pulse width,the amplitude of output voltage and over-current protection critical magnitude) through digital keyboard.It can be handled easily and used widely.
2003, 27(3): 168-171.
Abstract:
An advanced time-domain dynamic model for the investigation of semiconductor optical amplifiers(SOA) is presented.The model accounts for the ultrafast gain dynamics,the gain saturation and the pulse distortion induced by carrier density pulsation(CDP),carrier heating(CH) and spectral hole burning(SHB),the focus is on the ultrashort pulse gain saturation in SOA.It is shown by numerical simulation that there is a critical pulsewidth around 10ps,below which the intraband effects cannot be neglected.
An advanced time-domain dynamic model for the investigation of semiconductor optical amplifiers(SOA) is presented.The model accounts for the ultrafast gain dynamics,the gain saturation and the pulse distortion induced by carrier density pulsation(CDP),carrier heating(CH) and spectral hole burning(SHB),the focus is on the ultrashort pulse gain saturation in SOA.It is shown by numerical simulation that there is a critical pulsewidth around 10ps,below which the intraband effects cannot be neglected.
2003, 27(3): 172-174.
Abstract:
Based on Jones matrix method,the condition for noise suppression in intracavity-frequency-doubled lasers with folded resonator is studied and illustrated with numerical results.Some typical configurations,optimizing the polarization of the V-shaped folded resonator to minimize sum generation are proposed.
Based on Jones matrix method,the condition for noise suppression in intracavity-frequency-doubled lasers with folded resonator is studied and illustrated with numerical results.Some typical configurations,optimizing the polarization of the V-shaped folded resonator to minimize sum generation are proposed.
2003, 27(3): 175-177.
Abstract:
An analytical model to describe the temperature field was established for laser bending of sheet metal.In order to analyze the forming rule of the change to different parameters,a simulation software is programmed on laser scanning sheet metal along the line through the finite element analysis' software-ANSYS.The result shows that the bending angle decreases with the increasing thickness of sheet metal,increases with the increasing width of sheet metal,increases first and decreases afterwards with the increasing laser power,focus diameter or scanning speed if others factors remain unchanged.In addition sheet metal will bend deviating from the laser beam if there is a big thickness or a high scanning speed.Finally,the further academic analysis is carried out on the forming rule of laser bending of sheet metal.
An analytical model to describe the temperature field was established for laser bending of sheet metal.In order to analyze the forming rule of the change to different parameters,a simulation software is programmed on laser scanning sheet metal along the line through the finite element analysis' software-ANSYS.The result shows that the bending angle decreases with the increasing thickness of sheet metal,increases with the increasing width of sheet metal,increases first and decreases afterwards with the increasing laser power,focus diameter or scanning speed if others factors remain unchanged.In addition sheet metal will bend deviating from the laser beam if there is a big thickness or a high scanning speed.Finally,the further academic analysis is carried out on the forming rule of laser bending of sheet metal.
2003, 27(3): 178-181.
Abstract:
The principles and characteristics for lasox laser cutting of thick plates are presented in this paper.The steady-state conditions for the cutting were analyzed.The finite element method was used to simulate the surface temperature field along the centerline position in the cutting process.Based on this result,cutting quality was evaluated by the function of beam diameter,cutting speed and incident power.The range of cutting speed was also predicted for 20mm thick plates.A cutting experiment was made and the results shown that 12mm and 20mm thick plates could be cut successfully by the method ,at the same time,a reasonable agreement between the numerical simulation and the experimental results was found.
The principles and characteristics for lasox laser cutting of thick plates are presented in this paper.The steady-state conditions for the cutting were analyzed.The finite element method was used to simulate the surface temperature field along the centerline position in the cutting process.Based on this result,cutting quality was evaluated by the function of beam diameter,cutting speed and incident power.The range of cutting speed was also predicted for 20mm thick plates.A cutting experiment was made and the results shown that 12mm and 20mm thick plates could be cut successfully by the method ,at the same time,a reasonable agreement between the numerical simulation and the experimental results was found.
2003, 27(3): 182-184.
Abstract:
Starting from the Collins formula,a recurrence equation of Hermite-cosine-Gaussian (HCG) beams propagating through a paraxial ABCD system with a hard-edge aperture is derived,from which the propagation expressions for apertured HCG beams of any order can be derived by means of the recursive algorithm.The validity and advantage of our results are confirmed and illustrated by numerical calculations.
Starting from the Collins formula,a recurrence equation of Hermite-cosine-Gaussian (HCG) beams propagating through a paraxial ABCD system with a hard-edge aperture is derived,from which the propagation expressions for apertured HCG beams of any order can be derived by means of the recursive algorithm.The validity and advantage of our results are confirmed and illustrated by numerical calculations.
2003, 27(3): 185-189.
Abstract:
Aiming at the situation that traditional optical measurement method is usually used in particle position measurement of a target,but it is difficult to measure the tridimensional gesture of a target,a method of digital image processing is put forward to get more gesture parameters of the target.Characteristic spots are set up in image,combined with specific arithmetic,some tridimensional parameters,such as elevation,yaw,roll,shift,can be educed.
Aiming at the situation that traditional optical measurement method is usually used in particle position measurement of a target,but it is difficult to measure the tridimensional gesture of a target,a method of digital image processing is put forward to get more gesture parameters of the target.Characteristic spots are set up in image,combined with specific arithmetic,some tridimensional parameters,such as elevation,yaw,roll,shift,can be educed.
2003, 27(3): 190-192.
Abstract:
Based on the energy conservation principle and the paraxial ray tracing method,the "peacock eye" zone plates are designed and encoded.The plates are used as the elements with long focal depth,whose two important parameters:the axial intensity distribution and the axial variation of the focused-central-spot size,are simulated and analyzed.At last,the constant central-spot size within a finite focal segment is concluded and the corresponding experimental results are also illustrated.
Based on the energy conservation principle and the paraxial ray tracing method,the "peacock eye" zone plates are designed and encoded.The plates are used as the elements with long focal depth,whose two important parameters:the axial intensity distribution and the axial variation of the focused-central-spot size,are simulated and analyzed.At last,the constant central-spot size within a finite focal segment is concluded and the corresponding experimental results are also illustrated.
2003, 27(3): 193-196.
Abstract:
The effect of the parameters on weld appearance quality during laser welding with filler wire is studied in the article.The appearance quality obtained by controlling the wire feeding speed is compared with that obtained by controlling welding speed during laser welding with variable gap-width.The result shows that it is better to control wire feeding speed for narrower gap-width,otherwise it is better to control welding speed for wider gap-width.To meet the weld appearance quality requirement during high accuracy welding process,the double MCU system based on 80c51 is developed,which can adjust the welding parameters by gap-width during welding process to assure benign weld appearance quality during laser welding with filler wire.
The effect of the parameters on weld appearance quality during laser welding with filler wire is studied in the article.The appearance quality obtained by controlling the wire feeding speed is compared with that obtained by controlling welding speed during laser welding with variable gap-width.The result shows that it is better to control wire feeding speed for narrower gap-width,otherwise it is better to control welding speed for wider gap-width.To meet the weld appearance quality requirement during high accuracy welding process,the double MCU system based on 80c51 is developed,which can adjust the welding parameters by gap-width during welding process to assure benign weld appearance quality during laser welding with filler wire.
2003, 27(3): 197-198.
Abstract:
The new method is to test and calculate internal transmittance of optical glass with two samples.The paper focuses on theoretical inference of the calculating formula and briefly illustrates the advantages and disadvantages of the method.
The new method is to test and calculate internal transmittance of optical glass with two samples.The paper focuses on theoretical inference of the calculating formula and briefly illustrates the advantages and disadvantages of the method.
2003, 27(3): 199-201.
Abstract:
In the paper,the relation between laser divergence and parameters of concave-convex laser resonator has been experimentally investigated.A series of data about Nd:YAG rod thermal diopter and laser divergence have been obtained and analyzed.
In the paper,the relation between laser divergence and parameters of concave-convex laser resonator has been experimentally investigated.A series of data about Nd:YAG rod thermal diopter and laser divergence have been obtained and analyzed.
2003, 27(3): 202-204.
Abstract:
The transportation behavior of ablated materials is studied.The speed distribution of ablated materials when they leave target material surface is determined by the mechanism of ablation.The transportation behavior of ablated materials during the action of working laser is controlled by diffusion mechanism and light field force mechanism.The transportation behavior is determined by diffusion mechanism only after the action of laser.The time-space distribution and the tending-to-light phenomena of ablated materials are interpreted.
The transportation behavior of ablated materials is studied.The speed distribution of ablated materials when they leave target material surface is determined by the mechanism of ablation.The transportation behavior of ablated materials during the action of working laser is controlled by diffusion mechanism and light field force mechanism.The transportation behavior is determined by diffusion mechanism only after the action of laser.The time-space distribution and the tending-to-light phenomena of ablated materials are interpreted.
2003, 27(3): 205-207.
Abstract:
Laser remelting on the surface of Cr12 steel was performed with CO2 laser.The bending strength and wear resistance of Cr12 before and after laser surface remelting were compared.Fractorgraphy and TEM of microstructure in the remelting layer were studied by electron microscope.Austenitic distribution of the laser remelting layer as a function of distance from surface was measured with X-ray diffractometer.The experimental results show that super-refined microstructure is formed in the remelting layer.The bending strength and wear resistance are enhanced evidently.Plenty of dislocation cluster are found in the TEM of microstructure in the remelting layer after the bending strength and wear test.Super-refined microstructure,strain-induced martensite transformation in the retained austenite and formation of dislocation cluster are the important reasons to reinforce the bending strength and wear resistance.
Laser remelting on the surface of Cr12 steel was performed with CO2 laser.The bending strength and wear resistance of Cr12 before and after laser surface remelting were compared.Fractorgraphy and TEM of microstructure in the remelting layer were studied by electron microscope.Austenitic distribution of the laser remelting layer as a function of distance from surface was measured with X-ray diffractometer.The experimental results show that super-refined microstructure is formed in the remelting layer.The bending strength and wear resistance are enhanced evidently.Plenty of dislocation cluster are found in the TEM of microstructure in the remelting layer after the bending strength and wear test.Super-refined microstructure,strain-induced martensite transformation in the retained austenite and formation of dislocation cluster are the important reasons to reinforce the bending strength and wear resistance.
2003, 27(3): 208-210.
Abstract:
Developments of electric-optically Q-switched CO2 laser are summarized.Lasers with different structures and different exciting methods and their applications are described.Finally the result of theoretical study is provided.
Developments of electric-optically Q-switched CO2 laser are summarized.Lasers with different structures and different exciting methods and their applications are described.Finally the result of theoretical study is provided.
2003, 27(3): 211-213.
Abstract:
In this paper,a novel fabrication technique to obtain silicon crystalline flat planes is described.The selected Si crystalline planes that are not always the planes having the lowest etching rate are pre-obtained by deep-RIE.Si anisotropic wet etching generates the flat crystalline planes with EPW after the deep-RIE.The proposed technique is demonstrated by fabricating a solid polymer dye micro-cavity laser that is molded by the etched Si cavity.The lasing spectra confirm that the planes are optically smooth by measuring the sidewalls of the Si mold.
In this paper,a novel fabrication technique to obtain silicon crystalline flat planes is described.The selected Si crystalline planes that are not always the planes having the lowest etching rate are pre-obtained by deep-RIE.Si anisotropic wet etching generates the flat crystalline planes with EPW after the deep-RIE.The proposed technique is demonstrated by fabricating a solid polymer dye micro-cavity laser that is molded by the etched Si cavity.The lasing spectra confirm that the planes are optically smooth by measuring the sidewalls of the Si mold.
2003, 27(3): 214-215.
Abstract:
With dual beam path spectrophotometer,the transmitted spectra of the five natural iceland crystal samples with different appearance colour have been tested.It is proved that the mini-yellow iceland crystal's transmitted spectrum is the best among the samples and it is the best material to make ultraviolet polarizing device.
With dual beam path spectrophotometer,the transmitted spectra of the five natural iceland crystal samples with different appearance colour have been tested.It is proved that the mini-yellow iceland crystal's transmitted spectrum is the best among the samples and it is the best material to make ultraviolet polarizing device.
2003, 27(3): 216-219.
Abstract:
The SBS liquid medium used at present is introduced,the reason for the best characteristics of liquid fluoride and chloride as SBS medium is analyzed,and the potential good SBS liquid medium is discussed.
The SBS liquid medium used at present is introduced,the reason for the best characteristics of liquid fluoride and chloride as SBS medium is analyzed,and the potential good SBS liquid medium is discussed.
2003, 27(3): 220-222.
Abstract:
The focusing properties of Hermite-Gaussian(H-G)beams in passage through an aperture-lens separation optical system are studied based on the Collins formula.The axial intensity distribution and focal shift of H-G beams with even mode numbers are analyzed and illustrated with detailed numerical examples.It is found that the inverse focal shift and focusing without focal shift can be achieved by a suitable choice of the beam and optical system parameters.In particular,for the TEM22-mode H-G beam,there may be two equal axial maximum intensity points located on two sides of the geometrical focal plane,thus there are two focal shifts with opposite signs.
The focusing properties of Hermite-Gaussian(H-G)beams in passage through an aperture-lens separation optical system are studied based on the Collins formula.The axial intensity distribution and focal shift of H-G beams with even mode numbers are analyzed and illustrated with detailed numerical examples.It is found that the inverse focal shift and focusing without focal shift can be achieved by a suitable choice of the beam and optical system parameters.In particular,for the TEM22-mode H-G beam,there may be two equal axial maximum intensity points located on two sides of the geometrical focal plane,thus there are two focal shifts with opposite signs.
2003, 27(3): 223-225.
Abstract:
Based on coupling-wave equation,two-segment DFB lasers have been analyzed,and implicit expression of their carrier density and emission wavelength has been obtained.As a special case,the oscillation behaviors of the absorptive device with two equal-length segments:threshold conditions,carrier density and wavelength tuning range have been analyzed.
Based on coupling-wave equation,two-segment DFB lasers have been analyzed,and implicit expression of their carrier density and emission wavelength has been obtained.As a special case,the oscillation behaviors of the absorptive device with two equal-length segments:threshold conditions,carrier density and wavelength tuning range have been analyzed.
2003, 27(3): 226-228,232.
Abstract:
The triangular shearing interferometer,one of the most simple shearing interferometer,which has almost equal light distance,continuously adjustable shearing quality and two everlastingly parallel launching light beams,is described in the paper.Based on the interferometer,the quality of the laser wave front was detected.Then one-step differential method to recover the original wave front from the shearing interference pattern was discussed.Professional auxiliary system was applied to image processing,so the interferometer was combined with optics,mechanics and electronics.Finally the repetitive precision was experimentally checked up.
The triangular shearing interferometer,one of the most simple shearing interferometer,which has almost equal light distance,continuously adjustable shearing quality and two everlastingly parallel launching light beams,is described in the paper.Based on the interferometer,the quality of the laser wave front was detected.Then one-step differential method to recover the original wave front from the shearing interference pattern was discussed.Professional auxiliary system was applied to image processing,so the interferometer was combined with optics,mechanics and electronics.Finally the repetitive precision was experimentally checked up.
2003, 27(3): 229-232.
Abstract:
Influences on the FRSLs (fiber ring semiconductor lasers) properties of configuration parameter,i.e.,splitting ratio and coupling coefficient and residual reflectivity of SOA (semiconductor optical amplifier),have been examined using a simple traveling wave rate equations model of FRSLs,which is used to calculate threshold current,quanta efficiency and output power.The analysis confirms that there is an optimum splitting ratio to trade off between the threshold current,quanta efficiency and output power,whose behavior of an almost linear increase in single pass gain,maximal cavity gain and its stability with decrease average residual reflectivity.The threshold current to logarithm of splitting ratio meets linear relation.The simulating results verify that theory can give more accurate explanation to experimental phenomena.
Influences on the FRSLs (fiber ring semiconductor lasers) properties of configuration parameter,i.e.,splitting ratio and coupling coefficient and residual reflectivity of SOA (semiconductor optical amplifier),have been examined using a simple traveling wave rate equations model of FRSLs,which is used to calculate threshold current,quanta efficiency and output power.The analysis confirms that there is an optimum splitting ratio to trade off between the threshold current,quanta efficiency and output power,whose behavior of an almost linear increase in single pass gain,maximal cavity gain and its stability with decrease average residual reflectivity.The threshold current to logarithm of splitting ratio meets linear relation.The simulating results verify that theory can give more accurate explanation to experimental phenomena.
2003, 27(3): 233-235.
Abstract:
The application of fiber Bragg grating(FBG)used in strain monitoring of reinforced concrete structure is studied.Strain coefficient and temperature coefficient were obtained.Static test of reinforced concrete beam equiped with FBG was done in order to study whose distinct sensing ability and monitor strains of the beam.A kind of steel tube packaged FBG was made to monitor the temperature only in order to study simultaneous measurement of strain and temperature.
The application of fiber Bragg grating(FBG)used in strain monitoring of reinforced concrete structure is studied.Strain coefficient and temperature coefficient were obtained.Static test of reinforced concrete beam equiped with FBG was done in order to study whose distinct sensing ability and monitor strains of the beam.A kind of steel tube packaged FBG was made to monitor the temperature only in order to study simultaneous measurement of strain and temperature.
2003, 27(3): 236-239.
Abstract:
Nd:YVO4/KTP all-solid-state frequency doubling lasers with two kinds of cavity structure are introduced,and their parameters are optimized based on calculation.On the same experiment conditions,their output and stability are compared and analyzed completely,and conclusions are educed.Then,some better techniques are put forward.Based on the analyses,some products are made by the folded cavity.
Nd:YVO4/KTP all-solid-state frequency doubling lasers with two kinds of cavity structure are introduced,and their parameters are optimized based on calculation.On the same experiment conditions,their output and stability are compared and analyzed completely,and conclusions are educed.Then,some better techniques are put forward.Based on the analyses,some products are made by the folded cavity.
2003, 27(3): 240-242.
Abstract:
Based on the pure step quartz fiber with radius of 100μm and the length of 2m,the influence of the distance between the fiber and couple lens and pump energy on reflectivity and waveform at 1.06μm is studied.The maximum reflectivity is 68.95%,and the pulse compression ration varies from on third to on second with different incident energy.
Based on the pure step quartz fiber with radius of 100μm and the length of 2m,the influence of the distance between the fiber and couple lens and pump energy on reflectivity and waveform at 1.06μm is studied.The maximum reflectivity is 68.95%,and the pulse compression ration varies from on third to on second with different incident energy.
2003, 27(3): 243-244.
Abstract:
Based on the required precision and actual detection background,single-lens and cylinder lens design methods are proposed to collimate the beam of pulse semiconductor lasers and their design parameters are presented.With these methods,beam divergence of 1.48mrad and waist diameter of 0.325mm can be obtained.
Based on the required precision and actual detection background,single-lens and cylinder lens design methods are proposed to collimate the beam of pulse semiconductor lasers and their design parameters are presented.With these methods,beam divergence of 1.48mrad and waist diameter of 0.325mm can be obtained.
2003, 27(3): 245-247.
Abstract:
With the optical axis of the second BBO crystal twice the phase matching angle relative to the first one in LD-pumped intracavity doubling solid-state Nd:YAG/BBO blue laser,walk-off effect has been compensated and the beam quality has been improved.When each BBO crystal is 1.5 times longer than the effective interaction length,the output beam of the Nd:YAG/BBO/BBO laser is still circular and the ellipticity is 0.99.
With the optical axis of the second BBO crystal twice the phase matching angle relative to the first one in LD-pumped intracavity doubling solid-state Nd:YAG/BBO blue laser,walk-off effect has been compensated and the beam quality has been improved.When each BBO crystal is 1.5 times longer than the effective interaction length,the output beam of the Nd:YAG/BBO/BBO laser is still circular and the ellipticity is 0.99.
2003, 27(3): 248-250.
Abstract:
The temperature distribution of LD pumped Nd:YAG laser slab is calculated by using finite difference method.The calculated results show that the temperature distribution is related to the cooling structure and in agreement with the measured distribution attained by IR camera.By improving the cooling structure ,the M2 of laser beam is reduced from 6.7 to 3 with better temperature distribution.
The temperature distribution of LD pumped Nd:YAG laser slab is calculated by using finite difference method.The calculated results show that the temperature distribution is related to the cooling structure and in agreement with the measured distribution attained by IR camera.By improving the cooling structure ,the M2 of laser beam is reduced from 6.7 to 3 with better temperature distribution.
2003, 27(3): 251-253.
Abstract:
New type complex photoelectric equipment faces the difficulties such as short of knowledge about the equipment,without experience about equipment's maintainance,etc.In order to improve the technical personnel's capability for equipment's maintainance,the authors try to find methods to construct equipment's structure decomposing model,tactics to carry out fault forecasting,fault multiplying and fault diagnosing in structure member of the equipment.This can enable the technical personnel to master equipment's knowledge rapidly and possess equipment's fault diagnosing capability.
New type complex photoelectric equipment faces the difficulties such as short of knowledge about the equipment,without experience about equipment's maintainance,etc.In order to improve the technical personnel's capability for equipment's maintainance,the authors try to find methods to construct equipment's structure decomposing model,tactics to carry out fault forecasting,fault multiplying and fault diagnosing in structure member of the equipment.This can enable the technical personnel to master equipment's knowledge rapidly and possess equipment's fault diagnosing capability.
2003, 27(3): 254-255.
Abstract:
Based on laser threshold value method,central wavelengths of two kinds of phosphate laser glass used in high-power solid-state laser segment amplifiers are tested.Experimental results show that central wavelength of N31 phosphate laser glass made in China is 1052.7nm,and that of the phosphate laser glass made in Russian is 1051.4nm.
Based on laser threshold value method,central wavelengths of two kinds of phosphate laser glass used in high-power solid-state laser segment amplifiers are tested.Experimental results show that central wavelength of N31 phosphate laser glass made in China is 1052.7nm,and that of the phosphate laser glass made in Russian is 1051.4nm.
2003, 27(3): 256-258.
Abstract:
The mechanism of filamentation formed by femtosecond pulse laser beam propagating in atmosphere is investigated.The balance between the self-focusing of laser beam due to Kerr effect is countered by plasma defocusing caused by multiphoton ionization creates the stabilized long-distance filament propagation in atmosphere.The potential application of filament in ultra-wide-band lidar and laser induced lightning is also analyzed.
The mechanism of filamentation formed by femtosecond pulse laser beam propagating in atmosphere is investigated.The balance between the self-focusing of laser beam due to Kerr effect is countered by plasma defocusing caused by multiphoton ionization creates the stabilized long-distance filament propagation in atmosphere.The potential application of filament in ultra-wide-band lidar and laser induced lightning is also analyzed.
2003, 27(3): 259-261.
Abstract:
Based on the Collins formula and Sylvester theorem,the propagation equation of Gaussian beams passing through a multi-Gaussian apertured paraxial optical ABCD system is derived.The application of the equation is illustrated with numerical examples.
Based on the Collins formula and Sylvester theorem,the propagation equation of Gaussian beams passing through a multi-Gaussian apertured paraxial optical ABCD system is derived.The application of the equation is illustrated with numerical examples.
2003, 27(3): 262-264.
Abstract:
Using type Ⅱ/Ⅱ polarization-mismatch KDP crystal schemes for third harmonic generation,the effects of amplitude modulation and phase perturbation of incident fundamental field on the tripling efficiency and dynamic range have been discussed.The method which can improve the tripling efficiency and dynamic range has been proposed.The parameters of tripler under amplitude modulation and phase perturbation have been optimized.
Using type Ⅱ/Ⅱ polarization-mismatch KDP crystal schemes for third harmonic generation,the effects of amplitude modulation and phase perturbation of incident fundamental field on the tripling efficiency and dynamic range have been discussed.The method which can improve the tripling efficiency and dynamic range has been proposed.The parameters of tripler under amplitude modulation and phase perturbation have been optimized.
2003, 27(3): 265-267.
Abstract:
A novel parallel optical interconnection system based on VCSEL/MSM-CMOS technology is presented in this paper.The system design is introduced in detail.And the highlight is laid on PCI-HIPPI interface module,HIPPI-FIBER interface module and optical bus module in the interface card of optical communication network.
A novel parallel optical interconnection system based on VCSEL/MSM-CMOS technology is presented in this paper.The system design is introduced in detail.And the highlight is laid on PCI-HIPPI interface module,HIPPI-FIBER interface module and optical bus module in the interface card of optical communication network.
2003, 27(3): 268-270.
Abstract:
The beam alignment is very strict in laser phase-Doppler particle analyzer(PDA) measurement,and transparent organic glass is usually placed in the experiment.In theory,the organic glass can induce system error.Based on PDA spraying experiment with or without organic glass,with various thickness of organic glass,the effect of organic glass on PDA measurement result was found.Then the reason was analyzed.
The beam alignment is very strict in laser phase-Doppler particle analyzer(PDA) measurement,and transparent organic glass is usually placed in the experiment.In theory,the organic glass can induce system error.Based on PDA spraying experiment with or without organic glass,with various thickness of organic glass,the effect of organic glass on PDA measurement result was found.Then the reason was analyzed.
2003, 27(3): 271-272.
Abstract:
A new kind of optical fiber sensor is designed using the principle of optical fiber resonance.It meets the requirement of checking the great type of online generator.
A new kind of optical fiber sensor is designed using the principle of optical fiber resonance.It meets the requirement of checking the great type of online generator.
