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RSS2005 Vol. 17, No. 05s
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2005,
17.
Abstract:
An actively mode-locked Nd:YAG laser with an optimized resonator was demonstrated which can provide with large mode volume in the active material and high stability against thermal lensing fluctuations. By using a compact pump module which utilizes a...
An actively mode-locked Nd:YAG laser with an optimized resonator was demonstrated which can provide with large mode volume in the active material and high stability against thermal lensing fluctuations. By using a compact pump module which utilizes a...
2005,
17.
Abstract:
Simultaneous self-Q-switched and mode-locking was demonstrated in a diode-pumped Nd,Cr:YAG laser with an almost 100% modulation depth. The maximum average output power of 1.9 W was obtained at 1 064 nm with stability better than 1%. The corresponding...
Simultaneous self-Q-switched and mode-locking was demonstrated in a diode-pumped Nd,Cr:YAG laser with an almost 100% modulation depth. The maximum average output power of 1.9 W was obtained at 1 064 nm with stability better than 1%. The corresponding...
2005,
17.
Abstract:
The package structure and high efficiency cooling technique have been studied for high average power diode laser. The laser power of single CW DL bar reach 50 W, the life time reached 5 000 h, and the power of QCW DL bar reached 150 W at 10% duty cyc...
The package structure and high efficiency cooling technique have been studied for high average power diode laser. The laser power of single CW DL bar reach 50 W, the life time reached 5 000 h, and the power of QCW DL bar reached 150 W at 10% duty cyc...
2005,
17.
Abstract:
The upconversion luminescence of Yb3+-doped yttrium aluminum garnets under 940 nm excitation at room teperature was studied, and it was ascribed to Yb3+ cooperative luminescence and the presence of rare earth impurity ions. X-ray excited luminescence...
The upconversion luminescence of Yb3+-doped yttrium aluminum garnets under 940 nm excitation at room teperature was studied, and it was ascribed to Yb3+ cooperative luminescence and the presence of rare earth impurity ions. X-ray excited luminescence...
2005,
17.
Abstract:
The theory of beam shaping of laser diode array (LDA) is described and a beam-shaping system composed of two blazed grating arrays is presented. The system can theoretically transform the beam parameter product (BPP) of LDA into 5.7 mm·mrad in the fa...
The theory of beam shaping of laser diode array (LDA) is described and a beam-shaping system composed of two blazed grating arrays is presented. The system can theoretically transform the beam parameter product (BPP) of LDA into 5.7 mm·mrad in the fa...
2005,
17.
Abstract:
Thermal lens and stress induced birefringence are two key effects that must be considered in the design and optimization of high-power DPL. This paper discusses the general way of calculating the thermal lens by finite-difference beam propagation met...
Thermal lens and stress induced birefringence are two key effects that must be considered in the design and optimization of high-power DPL. This paper discusses the general way of calculating the thermal lens by finite-difference beam propagation met...
2005,
17.
Abstract:
This paper theoretically and experimentally investigated the elements which influence the gain distribution of laser medium. A high energy storage laser module was manufactured. In this module an 8 mm diameter Nd:YAG rod which was 120 mm long was pum...
This paper theoretically and experimentally investigated the elements which influence the gain distribution of laser medium. A high energy storage laser module was manufactured. In this module an 8 mm diameter Nd:YAG rod which was 120 mm long was pum...
2005,
17.
Abstract:
An all solid state laser was built, which is composed of a directional prism resonator, half-circular LD array to pump two Nd:YAG rods, Cr4+:YAG passive Q switched, and heat-conduct structure etc. It is a practical engineering instrument with high st...
An all solid state laser was built, which is composed of a directional prism resonator, half-circular LD array to pump two Nd:YAG rods, Cr4+:YAG passive Q switched, and heat-conduct structure etc. It is a practical engineering instrument with high st...
2005,
17.
Abstract:
Structural parameter of micro-channel heatsink is optimized through numerical calculation. Heat resistances of 4 different structural micro-channel heatsinks are measured by experiment. In order to take advantage of copper's high thermal conductivity...
Structural parameter of micro-channel heatsink is optimized through numerical calculation. Heat resistances of 4 different structural micro-channel heatsinks are measured by experiment. In order to take advantage of copper's high thermal conductivity...
2005,
17.
Abstract:
Using statistics analysis method, diode laser failure states were classified and the causes of these diode laser failures were analyzed in every packaging process. The result of the statistics analysis shows that the main causes of these failures are...
Using statistics analysis method, diode laser failure states were classified and the causes of these diode laser failures were analyzed in every packaging process. The result of the statistics analysis shows that the main causes of these failures are...
2005,
17.
Abstract:
Microchannel heat sinks are minute channels fabricated onto the back of the thin silicon chip substrate with hydraulic diameter ranging from 10 to 103 μm. Microchannels have the advantage of large surface area to volume ratio, low thermal resistances...
Microchannel heat sinks are minute channels fabricated onto the back of the thin silicon chip substrate with hydraulic diameter ranging from 10 to 103 μm. Microchannels have the advantage of large surface area to volume ratio, low thermal resistances...
2005,
17.
Abstract:
Great nonlinear coefficients of quasi-phase-matching crystals may be used in optical parametric chirped-pulse amplification (OPCPA) system. This is particularly true for the applications that require high repetition rates and small pump energies. The...
Great nonlinear coefficients of quasi-phase-matching crystals may be used in optical parametric chirped-pulse amplification (OPCPA) system. This is particularly true for the applications that require high repetition rates and small pump energies. The...
2005,
17.
Abstract:
Phase-locking of a diode laser array was achieved in a simple external cavity consisting of a fast axis collimating lens and a high-reflection coated external mirror. When the cavity length is a few centimeter, the far field pattern has 3 lobes, and ...
Phase-locking of a diode laser array was achieved in a simple external cavity consisting of a fast axis collimating lens and a high-reflection coated external mirror. When the cavity length is a few centimeter, the far field pattern has 3 lobes, and ...
2005,
17.
Abstract:
Using a high reflectivity mirror as the external cavity of a 19-unit diode laser array(LDA), the optical beam from the LDA can be coupled into itself by adjusting the distance and tilting angle of the external mirror. The bandwidth of the LDA was nar...
Using a high reflectivity mirror as the external cavity of a 19-unit diode laser array(LDA), the optical beam from the LDA can be coupled into itself by adjusting the distance and tilting angle of the external mirror. The bandwidth of the LDA was nar...
2005,
17.
Abstract:
Hollow lens duct is a good choice for the coupling system of the large-aperture high power diode arrays. With numerical analysis of three-dimension ray tracing, a computer simulation program was developed for end-pumped LD arrays coupling system. Bas...
Hollow lens duct is a good choice for the coupling system of the large-aperture high power diode arrays. With numerical analysis of three-dimension ray tracing, a computer simulation program was developed for end-pumped LD arrays coupling system. Bas...
2005,
17.
Abstract:
The article mainly discusses the design of pump coupling system that is one of the key technology of disk laser. In the optical system, we applied three fast and slow axis collimation cylinder lenses and one cylinder HR mirror. The fast and slow coll...
The article mainly discusses the design of pump coupling system that is one of the key technology of disk laser. In the optical system, we applied three fast and slow axis collimation cylinder lenses and one cylinder HR mirror. The fast and slow coll...
2005,
17.
Abstract:
This paper presents the numerical simulation of the Nd:YAG disk as the high power laser medium. The upper surface of the disk is pumped by the diode array, and the other side is cooled by copper heat sink. Temperature and stress are simulated for the...
This paper presents the numerical simulation of the Nd:YAG disk as the high power laser medium. The upper surface of the disk is pumped by the diode array, and the other side is cooled by copper heat sink. Temperature and stress are simulated for the...
2005,
17.
Abstract:
Thermal effects such as the thermally induced lens and thermally induced birefringence of the laser rod pumped by high power LD in laser amplifier and their compensations were discussed. Minus lenses can make good compensation for the thermally induc...
Thermal effects such as the thermally induced lens and thermally induced birefringence of the laser rod pumped by high power LD in laser amplifier and their compensations were discussed. Minus lenses can make good compensation for the thermally induc...
2005,
17.
Abstract:
A V-shaped Silicon microchannel cooler has an advantage of packaging compact laser diode arrays due to its high cooling power and specific structure. The structure and fabrication process of the V-shaped silicon microchannel cooler are reported. The ...
A V-shaped Silicon microchannel cooler has an advantage of packaging compact laser diode arrays due to its high cooling power and specific structure. The structure and fabrication process of the V-shaped silicon microchannel cooler are reported. The ...
2005,
17.
Abstract:
In order to get ultra-short intensity laser pulses, it is necessary to amplify the laser pulses from nJ level to mJ level. The regenerativeamplifier is the best way to get high-energy laser pulse. It can amplify the seed from nJ level to mJ level qui...
In order to get ultra-short intensity laser pulses, it is necessary to amplify the laser pulses from nJ level to mJ level. The regenerativeamplifier is the best way to get high-energy laser pulse. It can amplify the seed from nJ level to mJ level qui...
2005,
17.
Abstract:
As the representation of the third generation laser device high power double cladd fiber laser is applicatted in industry process and laser beam weapons. The developments of Yb3+ doped fiber lasers is introduced in this paper. The relationship betwee...
As the representation of the third generation laser device high power double cladd fiber laser is applicatted in industry process and laser beam weapons. The developments of Yb3+ doped fiber lasers is introduced in this paper. The relationship betwee...
2005,
17.
Abstract:
As a high power laser which has some important application background, the selection of solid-state laser’s parameters such as wavelength, beam aperture, power, and beam quality has been analyzed, and the influencing factors such as the atmospheric o...
As a high power laser which has some important application background, the selection of solid-state laser’s parameters such as wavelength, beam aperture, power, and beam quality has been analyzed, and the influencing factors such as the atmospheric o...
2005,
17.
Abstract:
High average power diode pumped laser (HAP-DPL) is a developing concept and research field. Its every progress depends on the technological innovation. Different approaches of the thermal management lead to the different type of HAP-DPL even beyond t...
High average power diode pumped laser (HAP-DPL) is a developing concept and research field. Its every progress depends on the technological innovation. Different approaches of the thermal management lead to the different type of HAP-DPL even beyond t...
2005,
17.
Abstract:
An LD pumped high power Nd:GdVO4 laser was reported. A continuous and pulse output of 1 064 nm was obtained. In the experiment of continuous output, when the pumped power was 20.2 W, an output power of 11.5 W with a maximum optical conversion efficie...
An LD pumped high power Nd:GdVO4 laser was reported. A continuous and pulse output of 1 064 nm was obtained. In the experiment of continuous output, when the pumped power was 20.2 W, an output power of 11.5 W with a maximum optical conversion efficie...
2005,
17.
Abstract:
An LD side-pumped A-O Q-switched intracavity frequency doubled Nd: YAG laser was studied. A folded resonator with a single pump head was experimentally studied and theoretically analyzed. Under the condition of a total pump power of 800 W and a repet...
An LD side-pumped A-O Q-switched intracavity frequency doubled Nd: YAG laser was studied. A folded resonator with a single pump head was experimentally studied and theoretically analyzed. Under the condition of a total pump power of 800 W and a repet...
2005,
17.
Abstract:
The theory of solid state Yb:YAG thin disk laser is introduced and it is compared with traditional rod Nd:YAG lasers. The powerful function of VersaDisk laser as dual wavelength output, wavelength tuning ability and single frequency are illustrated. ...
The theory of solid state Yb:YAG thin disk laser is introduced and it is compared with traditional rod Nd:YAG lasers. The powerful function of VersaDisk laser as dual wavelength output, wavelength tuning ability and single frequency are illustrated. ...
2005,
17.
Abstract:
Thermal effects present a major challenge to scaling of solid-state laser to high-average power. When using a thin laser crystal disc with a nearly flat top pump profile, the heat flux can be considered to be one-dimensional. This results in a homoge...
Thermal effects present a major challenge to scaling of solid-state laser to high-average power. When using a thin laser crystal disc with a nearly flat top pump profile, the heat flux can be considered to be one-dimensional. This results in a homoge...
2005,
17.
Abstract:
An LD-pumped Nd:YAG laser that generates simultaneous laser action at the wavelengths 1 064 nm and 946 nm by optimizing film design is presented. An optimized CW 593.5 nm yellow laser at room temperature was obtained for the first time. Using type-I ...
An LD-pumped Nd:YAG laser that generates simultaneous laser action at the wavelengths 1 064 nm and 946 nm by optimizing film design is presented. An optimized CW 593.5 nm yellow laser at room temperature was obtained for the first time. Using type-I ...
2005,
17.
Abstract:
A diode laser pumped Q-switched double-pass MOPA system operated on 400 Hz repetition rate and 15 ns pulse width has been investigated in this paper. The laser with a beam expanded mirror and a beam isolated equipment is amplified by two 6.5 kW diode...
A diode laser pumped Q-switched double-pass MOPA system operated on 400 Hz repetition rate and 15 ns pulse width has been investigated in this paper. The laser with a beam expanded mirror and a beam isolated equipment is amplified by two 6.5 kW diode...
2005,
17.
Abstract:
The power conditioning system for Xe-flash lamps pumped kW average power output solid state heat capacity laser (SSHCL) is described. It includes high power high voltage constant-current-charging system, capacitors bank, discharge control system, pow...
The power conditioning system for Xe-flash lamps pumped kW average power output solid state heat capacity laser (SSHCL) is described. It includes high power high voltage constant-current-charging system, capacitors bank, discharge control system, pow...
2005,
17.
Abstract:
A LDA side-pumped high-gain amplifier system with a dual-pass geometry is reported in this paper. According to the requirement of ICF driver, four ring-LD side-pumping Nd3+:YLF amplifiers are used in this system. More than 106 gain are achieved when ...
A LDA side-pumped high-gain amplifier system with a dual-pass geometry is reported in this paper. According to the requirement of ICF driver, four ring-LD side-pumping Nd3+:YLF amplifiers are used in this system. More than 106 gain are achieved when ...
2005,
17.
Abstract:
CW and Q-switched operation of Tm, Ho:GdVO4 laser is reported in this paper. The Tm,Ho:GdVO4 crystal is cooled by liquid nitrogen and end-pumped by a laser diode of 793nm. Output power of 4.0 W and optical-to-optical efficiency of 26% is achieved at ...
CW and Q-switched operation of Tm, Ho:GdVO4 laser is reported in this paper. The Tm,Ho:GdVO4 crystal is cooled by liquid nitrogen and end-pumped by a laser diode of 793nm. Output power of 4.0 W and optical-to-optical efficiency of 26% is achieved at ...
2005,
17.
Abstract:
The shift coefficients of the central wavelength of diode laser under different cooling water temperature and operating current were measured. The gain distrubution in the Nd:YAG rod was theoretically studied using ray tracing program. Without the he...
The shift coefficients of the central wavelength of diode laser under different cooling water temperature and operating current were measured. The gain distrubution in the Nd:YAG rod was theoretically studied using ray tracing program. Without the he...
2005,
17.
Abstract:
The development and current status of solid-state heat capacity lasers are described. The basic principle of a high power solid-state heat capacity laser is introduced. The experimental results of a diode-pumped Nd:YAG heat capacity disk laser are pr...
The development and current status of solid-state heat capacity lasers are described. The basic principle of a high power solid-state heat capacity laser is introduced. The experimental results of a diode-pumped Nd:YAG heat capacity disk laser are pr...
2005,
17.
Abstract:
Solid-state lasers and compact power supplies have been developed much well in recent years, and this makes it a possible aim that solid-state lasers powered by electricity will be applied in the near future. It is necessary to optimize the performan...
Solid-state lasers and compact power supplies have been developed much well in recent years, and this makes it a possible aim that solid-state lasers powered by electricity will be applied in the near future. It is necessary to optimize the performan...
2005,
17.
Abstract:
In a double-pass amplifier system, a laser pulse width(FWHM) of l6.9 ns and more than 216 mJ was obtained in the case of 10 Hz repetition frequency. Furthermore, 203.4 mJ per pulse was achieved where the repetition rate is up to 400 Hz. The beam qual...
In a double-pass amplifier system, a laser pulse width(FWHM) of l6.9 ns and more than 216 mJ was obtained in the case of 10 Hz repetition frequency. Furthermore, 203.4 mJ per pulse was achieved where the repetition rate is up to 400 Hz. The beam qual...
2005,
17.
Abstract:
The heat- capacity operation of a solid state laser is a novel method by which a high quality beam and high average power can be generated. This paper describes a diodes- pumped solid state heat capacity laser that produces average power of 300 W and...
The heat- capacity operation of a solid state laser is a novel method by which a high quality beam and high average power can be generated. This paper describes a diodes- pumped solid state heat capacity laser that produces average power of 300 W and...
2005,
17.
Abstract:
Tm1－xGdxAl3(BO3)4 crystals were grown from the K2Mo3O10-B2O3 flux by the top-seeded solution growth (TSSG) method. The TmAl3(BO3)4 crystal structure was measured. Tm3＋:GAB was cut into samples in c-axis and polarized absorption and emission spectra w...
Tm1－xGdxAl3(BO3)4 crystals were grown from the K2Mo3O10-B2O3 flux by the top-seeded solution growth (TSSG) method. The TmAl3(BO3)4 crystal structure was measured. Tm3＋:GAB was cut into samples in c-axis and polarized absorption and emission spectra w...
2005,
17.
Abstract:
Using an electron beam evaporation technique.ZrO2 thin films were deposited on three kinds of Lithium triborate (LiB305 or LBO) substrates with three different crystalline orientations. The influences of LBO structure on the microstructure and optica...
Using an electron beam evaporation technique.ZrO2 thin films were deposited on three kinds of Lithium triborate (LiB305 or LBO) substrates with three different crystalline orientations. The influences of LBO structure on the microstructure and optica...
2005,
17.
Abstract:
An LD-end-pumped Nd:YVO4 crystal 593 nm yellow laser by intracavity sum-frequency mixing (SFM) is reported. With one plane-curved cavity dual-wavelength operation, 1 064 nm and 1 342 nm, is realized. By LBO Intracavity SFM 593 nm laser is attained. W...
An LD-end-pumped Nd:YVO4 crystal 593 nm yellow laser by intracavity sum-frequency mixing (SFM) is reported. With one plane-curved cavity dual-wavelength operation, 1 064 nm and 1 342 nm, is realized. By LBO Intracavity SFM 593 nm laser is attained. W...
2005,
17.
Abstract:
The strongest transition of the Nd:YAG occurs at 1 064 nm, which exhibits a fluorescence linewidth of 4～6 cm-1, the Nd:YAG laser shows multiple longitudinal-mode operation at 1 064 nm usually. In order to obtain the laser emission at 1 319 nm, key mi...
The strongest transition of the Nd:YAG occurs at 1 064 nm, which exhibits a fluorescence linewidth of 4～6 cm-1, the Nd:YAG laser shows multiple longitudinal-mode operation at 1 064 nm usually. In order to obtain the laser emission at 1 319 nm, key mi...
2005,
17.
Abstract:
The dispersion and refractive index inhomogeneity of film materials and error accumulation of layers thickness are all the factors that cause the half-wave hole for a harmonic beam splitter, among them the periodic error accumulation of layer thickne...
The dispersion and refractive index inhomogeneity of film materials and error accumulation of layers thickness are all the factors that cause the half-wave hole for a harmonic beam splitter, among them the periodic error accumulation of layer thickne...
2005,
17.
Abstract:
A wavelength separation multilayer with high reflectivity at 1 030 nm and high transmittance at 940 and 980 nm was obtained by optimizing the film stack, such as inserting matching layers, tuning the periodic thickness with the help of thin film desi...
A wavelength separation multilayer with high reflectivity at 1 030 nm and high transmittance at 940 and 980 nm was obtained by optimizing the film stack, such as inserting matching layers, tuning the periodic thickness with the help of thin film desi...
2005,
17.
Abstract:
Optical thin films for LD-pumped Nd:YAG/LBO yellow laser at 556 nm are presented in this paper. To achieve 1 112 nm laser action and output 556 nm yellow laser with high power, the coating design of resonator mirrors was analyzed. The spectrum transm...
Optical thin films for LD-pumped Nd:YAG/LBO yellow laser at 556 nm are presented in this paper. To achieve 1 112 nm laser action and output 556 nm yellow laser with high power, the coating design of resonator mirrors was analyzed. The spectrum transm...
2005,
17.
Abstract:
A doubly resonant ZnGeP2 (ZGP) optical parametric oscillator pumped by a Tm,Ho:GdVO4 laser is investigated. High pulse repetition frequency of 10 kHz cryogenic Tm(5%),Ho(0.5%):GdVO4 laser at 2.05 μm was utilized as pumping source for ZnGeP2 OPO. The ...
A doubly resonant ZnGeP2 (ZGP) optical parametric oscillator pumped by a Tm,Ho:GdVO4 laser is investigated. High pulse repetition frequency of 10 kHz cryogenic Tm(5%),Ho(0.5%):GdVO4 laser at 2.05 μm was utilized as pumping source for ZnGeP2 OPO. The ...
2005,
17.
Abstract:
The accumulation effect of multi-shot laser-induced damage to optical coatings was investigated. Laser damage testing was performed at 1 064 nm with nanosecond pulses at a pulse length of 12 ns, using an accurate and reliable measurement system. The ...
The accumulation effect of multi-shot laser-induced damage to optical coatings was investigated. Laser damage testing was performed at 1 064 nm with nanosecond pulses at a pulse length of 12 ns, using an accurate and reliable measurement system. The ...
2005,
17.
Abstract:
A model which treated the active medium as a thick lens was established to analyze the effects of thermal lens in the resonator. By using the matrix method, the equivalent resonator performance was studied. The uniformity of pump energy distribution ...
A model which treated the active medium as a thick lens was established to analyze the effects of thermal lens in the resonator. By using the matrix method, the equivalent resonator performance was studied. The uniformity of pump energy distribution ...
2005,
17.
Abstract:
The thermodynamic model was established for analyzing the temperature and the thermal stress in laser medium. The transient heat conduction equation is the base in the model. First, the longitudinal distribution of the heat deposition power density w...
The thermodynamic model was established for analyzing the temperature and the thermal stress in laser medium. The transient heat conduction equation is the base in the model. First, the longitudinal distribution of the heat deposition power density w...
2005,
17.
Abstract:
The development and application background of 2 μm laser were summarized. Two schemes to obtain 2 μm laser were compared and the indirect tunable scheme was adopted.After LD pumped intra-cavity KTP OPO being adopted, the pump peak value power density...
The development and application background of 2 μm laser were summarized. Two schemes to obtain 2 μm laser were compared and the indirect tunable scheme was adopted.After LD pumped intra-cavity KTP OPO being adopted, the pump peak value power density...
2005,
17.
Abstract:
Based on the nonlinear optics coupled wave equations, a physics model of SBS under focal pumping condition was established and numerical codes were developed. The laser field in fused silica glass when SBS existed was thoroughly evaluated and the dam...
Based on the nonlinear optics coupled wave equations, a physics model of SBS under focal pumping condition was established and numerical codes were developed. The laser field in fused silica glass when SBS existed was thoroughly evaluated and the dam...
2005,
17.
Abstract:
The KTP OPO was studied for frequency conversion of Nd-doped lasers to longer wavelengths and can be used as the basis for eye-safe lidar systems operating in the 1 550 nm wavelength region. One of the major advantages of OPO based on KTP and its iso...
The KTP OPO was studied for frequency conversion of Nd-doped lasers to longer wavelengths and can be used as the basis for eye-safe lidar systems operating in the 1 550 nm wavelength region. One of the major advantages of OPO based on KTP and its iso...
2005,
17.
Abstract:
Two kinds of azobenzene polymers (including four samples: films of HMMM-DR1, HMMM-DR19 and films of side-chain azobenzene polymers PCN6 and PCN2) were synthesized and prepared. The HMMM-DR1 and PCN6 were studied and compared with all-optical poling (...
Two kinds of azobenzene polymers (including four samples: films of HMMM-DR1, HMMM-DR19 and films of side-chain azobenzene polymers PCN6 and PCN2) were synthesized and prepared. The HMMM-DR1 and PCN6 were studied and compared with all-optical poling (...
