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Energy transfer in solid-state dye lasers based on methyl methacrylate co-doped with sulforhodamine B and crystal violet
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作者 R.G.Geethu Mani M.Basheer Ahamed 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第11期319-324,共6页
Laser action in methyl methacrylate (MMA) co-doped with sulforhodamine B and crystal violet dyes was investi- gated. The dye mixture was incorporated into a solid polymeric matrix and was pumped by a 532-nm Nd:YAG ... Laser action in methyl methacrylate (MMA) co-doped with sulforhodamine B and crystal violet dyes was investi- gated. The dye mixture was incorporated into a solid polymeric matrix and was pumped by a 532-nm Nd:YAG laser. Distributed feedback dye laser (DFDL) action was induced in the dye mixture using a prism arrangement both in the donor and acceptor regions by an energy transfer mechanism. Theoretically, the characteristics of acceptor and donor DFDLs, and the dependence of their pulse widths and output powers on acceptor-donor concentrations and pump power, were studied. Experimentally, the output energy of DFDL was measured at the emission peaks of donor and acceptor dyes for different pump powers and different acceptor-donor concentrations. Tuning of the output wavelength was achieved by varying the period of the gain modulation of the laser medium. The laser wavelength showed continuous tunability from 563 nm to 648 nm. 展开更多
关键词 sulforhodamine B crystal violet distributed feedback dye laser solid state distributed feedbackdye laser
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New Progress on All Solid State Laser Technology in China 被引量:4
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作者 姚建铨 《光学与光电技术》 2007年第1期1-10,共10页
1 Significance of All Solid State Laser (DPL) Technology in Field of LaserBecause of the advantages of high conversion efficiency, good beam quality, small size and light weight, DPL becomes the hotspot and priority o... 1 Significance of All Solid State Laser (DPL) Technology in Field of LaserBecause of the advantages of high conversion efficiency, good beam quality, small size and light weight, DPL becomes the hotspot and priority of development of laser technology. It may be the main body of laser in the future and replace gas laser and liquid laser. It is a great revolution of laser technology.The developed countries vie in developing DPL. China has achieved great success in this field, but there is a wide gap between the developed countries and us. We should attach great importance to it. 展开更多
关键词 DPL NM New Progress on All solid state Laser Technology in China
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Infrared Laser Pumped Green and Blue Laser Emissions from a Single Solid State Material Doped by Rare Earth Ions
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作者 黄艺东 黄妙良 +1 位作者 陈雨金 罗遵度 《Journal of Rare Earths》 SCIE EI CAS CSCD 2003年第3期307-314,共8页
The possible ways and progress of infrared or red laser pumped green and blue laser emissions from a single solid state material doped by rare earth ions are outlined. The green and blue lasers realized from infrared ... The possible ways and progress of infrared or red laser pumped green and blue laser emissions from a single solid state material doped by rare earth ions are outlined. The green and blue lasers realized from infrared laser pumped rare earth doped nonlinear laser crystals by means of self frequency conversion and from infrared laser pumped rare earth doped bulk, fiber and microsphere materials by means of frequency upconversion are introduced in detail. Other kinds of devices and methods are also compared. The typical nonlinear laser crystals such as YAl 3(BO 3) 4, GdAl 3(BO 3) 4, YCa 4O(BO 3) 3 , GdCa 4O(BO 3) 3, and the typical upconversion fluoride fibers are compared and analyzed. The major problems remaining to be solved and the developing trends in the area are also discussed. 展开更多
关键词 OPTICS solid state laser material blue and green lasers rare earth
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Synchronization of Chaotic Intensities and Phases in an Array of N Lasers 被引量:5
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作者 SUNJian ZHUShi-Qun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第2期233-239,共7页
A linear array of N mutually coupled single-mode lasers is investigated. It is shown that the intensities of N lasers are chaotically synchronized when the coupling between lasers is relatively strong. The chaotic syn... A linear array of N mutually coupled single-mode lasers is investigated. It is shown that the intensities of N lasers are chaotically synchronized when the coupling between lasers is relatively strong. The chaotic synchronization of intensities depends on the location of the lasers in the array. The chaotic synchronization appears between two outmost lasers, the second two outmost lasers, etc. There is no synchronization between nearest neighbors of the lasers. If the number of N is odd, the middle laser is never synchronized between any lasers. The chaotic synchronization of phases between nearest lasers in the array is examined by using the analytic signal and the Gaussian filter methods based on the peak of the power spectrum of the intensity. It can be seen that the message of chaotic intensity synchronization is conveyed through the phase synchronization. 展开更多
关键词 chaotic synchronization intensity phase linear array solid state lasers
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Modeling the pulse shape of Q-switched lasers to account for terminal-level relaxation
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作者 曾钦勇 万勇 +1 位作者 熊吉川 朱大勇 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第3期233-238,共6页
To account for the effect of lower-level relaxation, we have derived a characteristic equation for describing the laser pulse from the modified rate equations for Q-switched lasers. The pulse temporal profile is relat... To account for the effect of lower-level relaxation, we have derived a characteristic equation for describing the laser pulse from the modified rate equations for Q-switched lasers. The pulse temporal profile is related to the ratio of the lower-level lifetime to the cavity lifetime and the number of times the population inversion density is above the threshold. By solving the coupled rate equations numerically, the effect of terminal-level lifetime on pulse temporal behaviour is analysed. The mode is applied to the case of a diode-pumped Nd:YAG laser that is passively Q-switched by a Cr4+ :YAG absorber. Theoretical results show good agreement with the experiments. 展开更多
关键词 solid state laser passive Qnswitch Cr4+:YAG absorber
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Research on power improvement of a LD directly-pumped mid-infrared pulse solid-state laser
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作者 ZHANG Meng YANG Xi +5 位作者 GUO Jia-Wei CAI He WU Xin-Yang HAN Ju-Hong WANG Shun-Yan WANG You 《红外与毫米波学报》 2024年第6期820-826,共7页
An LD directly-pumped solid-state laser is considered to be one of the most promising mid-infrared light sources because of its simple principle,small size,and compact structure for the generation of mid-infrared(MIR)... An LD directly-pumped solid-state laser is considered to be one of the most promising mid-infrared light sources because of its simple principle,small size,and compact structure for the generation of mid-infrared(MIR)lasers in the 3-5µm band.However,the quantum defect of LD directly-pumped MIR solid-state lasers will be much larger than that of ordinary near-infrared LD pumped solid-state lasers,which may lead to thermal damage and limit their development.In order to solve this problem,the methods of reducing the specific surface area of the crystal and improving the thermal energy released by the crystal structure are discussed,and the opti⁃mal length of the laser crystal is determined.The cooling structures of barium yttrium fluoride laser crystals(Ho^(3+):BY_(2)F_(8))of different lengths were studied by thermal simulation using COMSOL software.The experimen⁃tal results show that the output power can be increased and the thermal stress in the laser crystal can be alleviated by using the laser crystal whose length is slightly shorter than that of the cooler.The final experiment shows that when the pump repetition rate is 15 Hz and the pulse width is 90µs,the single pulse energy is 7.28 mJ at the out⁃put wavelength of 3.9µm,which is about 3 times as large as that of the crystal with the length of 10 mm(2.81 mJ).Such results should be another breakthrough of our team since the first directly-pumped solid-state MIR laser was realized more than a year ago.It might pave the way for the construction of a feasible MIR laser in the near future. 展开更多
关键词 mid-infrared laser LD directly pumping solid state laser Ho:BYF laser crystal
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Diode Pumped Monolithic Unidirectional Nonplanar Single-Frequency Ring Laser 被引量:1
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作者 吴克瑛 赵长明 +5 位作者 史俊峰 魏光辉 刘安汉 崔连荣 朱震 洪冬梅 《Journal of Beijing Institute of Technology》 EI CAS 2001年第2期175-179,共5页
Diode pumped monolithic nonplanar ring laser has been developed, yielding single frequency laser and has the advantages of compactness, reliability and high efficiency. Its principles are given in detail and a monolit... Diode pumped monolithic nonplanar ring laser has been developed, yielding single frequency laser and has the advantages of compactness, reliability and high efficiency. Its principles are given in detail and a monolithic nonplanar ring laser is designed. As a result, a laser of hundreds milliwatts cw single frequency output was built up, placed in a magnetic field and pumped by LD. The optical conversion efficiency was more than 15% and the slope efficiency more than 30%. The laser beam had a good quality, with M 2 about 1 2. 展开更多
关键词 SINGLE-FREQUENCY diode pumped solid state laser
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Beam cleanup of a 532-nm pulsed solid-state laser using a bimorph mirror 被引量:4
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作者 雷翔 许冰 +3 位作者 杨平 董理治 刘文劲 晏虎 《Chinese Optics Letters》 SCIE EI CAS CSCD 2012年第2期44-47,共4页
A successful beam cleanup of a 5-mJ/200-μs pulsed solid-state laser system operating at 532-nm wavelength is demonstrated. In this beam cleanup system, a wave-front sensor-less adaptive optics (AO) system is set up... A successful beam cleanup of a 5-mJ/200-μs pulsed solid-state laser system operating at 532-nm wavelength is demonstrated. In this beam cleanup system, a wave-front sensor-less adaptive optics (AO) system is set up with a 20-element bimorph mirror (BM), a high-voltage amplifier, a chaxge-coupled device camera, and a control software implementing the stochastic parallel gradient descent (SPGD) algorithm. The brightness of the laser focal spot is improved because the wave-front distortions have been compensated. The performance of this system is presented and the experimental results are analyzed. 展开更多
关键词 solid state lasers Voltage regulators
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All-solid-state doubly resonant sum-frequency continuous-wave laser at 555 nm 被引量:1
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作者 吕彦飞 檀慧明 钱龙生 《Chinese Optics Letters》 SCIE EI CAS CSCD 2006年第1期25-26,共2页
A new kind of resonator for doubly resonant continuous-wave (CW) intracavity sum-frequency mixing (SFM) is presented. A coherent radiation of 327 mW at 555 nm is generated by mixing 1342-nm Nd:YVO4 laser and 946-... A new kind of resonator for doubly resonant continuous-wave (CW) intracavity sum-frequency mixing (SFM) is presented. A coherent radiation of 327 mW at 555 nm is generated by mixing 1342-nm Nd:YVO4 laser and 946-nm Nd:YAG laser. The M^2 beam quality factor of the sum-frequency mixed yellow-green laser is less than 1.7. The low-noise characteristic of the yellow laser is demonitrated. 展开更多
关键词 Energy efficiency Laser beams Laser resonators Optical systems solid state lasers
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Analysis of Thermal Effects in Laser Rod Pumped by Repetitively Pulsed Laser Diode Array 被引量:2
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作者 DAI Qin LI Xin-zhong +1 位作者 WU Ri-na WANG Xi-jun 《Semiconductor Photonics and Technology》 CAS 2007年第4期283-288,共6页
Based on some assumptions, the numerical model of thermal distribution in solid state laser crystal pumped by pulsed laser diode is set up due to the pumped intensity distribution. Taking into account the property of ... Based on some assumptions, the numerical model of thermal distribution in solid state laser crystal pumped by pulsed laser diode is set up due to the pumped intensity distribution. Taking into account the property of YAG materials that varies with temperature, the transient temperature distribution of the laser crystal is calculated using finite element method on condition that K is a constant and a function of temperature. Then, the influence of the pumping parameters on the thermal effect in laser crystal is also discussed. This study is helpful to optimize the design of the diode side pumped solid state lasers. 展开更多
关键词 thermal effects finite element method solid state lasers
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High power all-solid-state quasi-continuous-wave tunable Ti:sapphire laser system
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作者 邹雷 丁欣 +4 位作者 邹跃 马洪梅 温午麒 王鹏 姚建铨 《Chinese Optics Letters》 SCIE EI CAS CSCD 2005年第4期208-209,共2页
This paper reports a high power, all-solid-state, quasi-continuous-wave tunable Ti:sapphire laser system pumped by laser diode (LD) pumped frequency-doubled Nd:YAG laser. The maximum tuned output power of 4.2 W (797 n... This paper reports a high power, all-solid-state, quasi-continuous-wave tunable Ti:sapphire laser system pumped by laser diode (LD) pumped frequency-doubled Nd:YAG laser. The maximum tuned output power of 4.2 W (797 nm) and tuned average power of 3.7 W were achieved when fixing the Ti:sapphire broadband output power at 5.0 W and applying 750-850 nm broadband coated mirror. 展开更多
关键词 High power lasers Pumping (laser) SAPPHIRE solid state lasers TITANIUM Tuning
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A narrow-linewidth continuous wave Ho:YALO_3 laser with Fabry–Perot etalons
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作者 杨晓涛 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第3期289-292,共4页
A narrow linewidth continuous wave Ho:YAP laser with two Fabry-Perot etalons pumped by a Tm:YLF laser is reported. The maximum output power reaches 8.3 W when the incident pump power is 15.8 W, with 52.5% optical-to... A narrow linewidth continuous wave Ho:YAP laser with two Fabry-Perot etalons pumped by a Tm:YLF laser is reported. The maximum output power reaches 8.3 W when the incident pump power is 15.8 W, with 52.5% optical-to- optical conversion efficiency and 62.6% slope efficiency. A stable laser output at 2118.1 nm is achieved, with a linewidth less than 0.4 nm (full width at half maximum). The beam quality factor is M2- 1.25, measured by the traveling knife-edge method. 展开更多
关键词 solid state lasers Tm:YLF Ho:YAP Fabry-Perot etalons
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Laser output of radial-slab solid-state laser
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作者 田兆硕 成洪玲 +2 位作者 许平 张兴宝 付石友 《Chinese Optics Letters》 SCIE EI CAS CSCD 2013年第4期34-36,共3页
In this letter, numerical simulation and experimental study of a radial-slab solid-state laser are presented. The laser includes four crossing-slabs pumped by four Xe flashlamps. The numerical simulation of coherent i... In this letter, numerical simulation and experimental study of a radial-slab solid-state laser are presented. The laser includes four crossing-slabs pumped by four Xe flashlamps. The numerical simulation of coherent intensity in the near field and the far field indicates that the laser with the structure can improve the quality of output beam compared with incoherent beam combination. The radial-slab solid-state laser is fabricated, and initiM experiments are carried out at a pulse repetition of 1 Hz. Nine beams in the near field and one combined beam in the far field are obtained in our initial experiment. The experimental results are consistent with the numerical analysis in the coherent condition. The results show that coherent beam combination is obtained by this laser. 展开更多
关键词 Computer simulation EXPERIMENTS solid state lasers
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Threshold characteristic of intracavity optical parametric oscillator pumped by all-solid-state Q-switched laser
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作者 王与烨 徐德刚 +3 位作者 于意仲 温午麒 李喜福 姚建铨 《Chinese Optics Letters》 SCIE EI CAS CSCD 2008年第3期207-210,共4页
We derive the threshold pump intensity for a singly resonant intracavity optical parametric oscillator (IOPO) based on a temporal coupled field model. Particular attention is paid to the dependence of the intracavit... We derive the threshold pump intensity for a singly resonant intracavity optical parametric oscillator (IOPO) based on a temporal coupled field model. Particular attention is paid to the dependence of the intracavity singly resonant OPO (SRO) threshold intensity on the signal wave output coupling. Meanwhile, a Nd:YAG laser pumped KTiOPO4 (KTP) IOPO for eye-safe laser output is studied experimentally. The experiment is performed with four signal wave output reflectivities of 60%, 70%, 80%, and 90%, respectively. The measured values are in good agreement with the theoretical results. With an output coupler reflectivity of 80%, a peak power of 70 kW at 1572 nm has been obtained at a repetition rate of 3.5 kHz. The pulse width is 4.9 ns. Such investigation is helpful to identifying suitable operational regime of low pump intensity. 展开更多
关键词 Light reflection Q switched lasers solid state lasers
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Growth and Spectral Characteristics of Yb^(3+)-doped LiGd(MoO_4)_2 Crystal 被引量:1
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作者 黄新阳 王国富 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2010年第6期853-860,共8页
The Yb3+-doped LiGd(MoO4)2 crystal with the size up to Φ20×30 mm3 has been grown by Czochralski technique.The polarized room temperature absorption and emission spectra have been investigated.This crystal exh... The Yb3+-doped LiGd(MoO4)2 crystal with the size up to Φ20×30 mm3 has been grown by Czochralski technique.The polarized room temperature absorption and emission spectra have been investigated.This crystal exhibits a broad absorption band centered at 975 nm with an FWHM of 43 and 59 nm for π-and σ-polarization,respectively,and the corresponding maximal absorption cross-sections are 3.36 and 2.42×10-20 cm2.The emission broadband has an FWHM of 47 and 54 nm for π-and σ-polarization,respectively,with the corresponding emission cross sections of 3.92 and 3.34 × 10-20 cm2 at 1020 nm.The measured fluorescence lifetime is 287 μs. 展开更多
关键词 optical microscopy growth from melt MOLYBDATE solid state laser materials
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Growth,Structure,and Spectroscopic Characteristics of the Nd^(3+):LiGd(WO_4)_2 Crystal 被引量:1
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作者 黄新阳 王国富 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第1期85-96,共12页
The Nd^3+:LiGd(WO4) 2 crystal with dimensions of 25mm×28mm×16mm was grown by the top-seeded solution growth method from the 60 mol% Li2W2O7 flux. LiGd(WO4) 2 crystallizes in the tetragonal system with ... The Nd^3+:LiGd(WO4) 2 crystal with dimensions of 25mm×28mm×16mm was grown by the top-seeded solution growth method from the 60 mol% Li2W2O7 flux. LiGd(WO4) 2 crystallizes in the tetragonal system with space group I41/a(C4h^6) and cell parameters: a = 5.1986 and c = 11.2652A. The hardness is about 5.0 Mohs' scale. The specific heat is 0.40 J·g^-1·K^-1 at 50 oC. The thermal expansion coefficients for a-and c-axes are 1.314×10^-5 and 2.052×10^-5 K^-1,respectively. The room-temperature polarized absorption and emission spectra and the fluorescence decay curve was measured. The parameters of oscillator strengths,the spontaneous transition probabilities,the fluorescence branching ratios,the radiative lifetimes,and the emission cross sections have been investigated based on Judd-Ofelt theory and Füchtbauer-Ladenburg method. The absorption cross-section is 5.19×10^-20 cm^2 at 805 nm for π-polarization and its line width is 15 nm; the emission cross section is 1.726×10^-19 cm^2 at 1060.5 nm for π-polarization. The fluorescence and radiative lifetimes are 86 and 158 μs,respectively. The fluorescence quantum efficiency is 54.43%. 展开更多
关键词 optical microscopy growth from melt Nd^3+:LiGd(WO4)2 crystal solid state laser materials
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LD Pumped High Efficient Intracavity Frequency-Doubled Green Laser
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作者 陈进 于意仲 +2 位作者 朱孟 王鹏 王杰 《Transactions of Tianjin University》 EI CAS 2003年第1期1-6,共6页
A laser diode (LD) pumped Q switched high efficient intracavity frequency doubled Nd ∶YAG laser is reported here. The authors have designed an optical coupler and pointed out that the key to increasing harmonic conve... A laser diode (LD) pumped Q switched high efficient intracavity frequency doubled Nd ∶YAG laser is reported here. The authors have designed an optical coupler and pointed out that the key to increasing harmonic conversion efficiency is to decrease the loss of fundamental wave. In the experiments, a fundamental mode output laser was acquired. When the pumping power was 12 W, 2.6 W average output power at 1 064 nm with AO Q switch was obtained. 2.1 W average output power at 532 nm was obtained with intracavity frequency doubling, and the highest second harmonic conversion efficiency was 82 0 0. 展开更多
关键词 LD pumped solid state laser high efficient intracavity frequency doubled green laser
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Realization of a continuous frequency-tuning Ti:sapphire laser with an intracavity locked etalon 被引量:6
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作者 孙雪俊 魏娇 +1 位作者 王文哲 卢华东 《Chinese Optics Letters》 SCIE EI CAS CSCD 2015年第7期65-68,共4页
A continuous-wave all-solid-state tunable Ti:sapphire laser with compact configuration is presented. The frequency-tuning range extends from 760 to 825 nm by rotating the birefringent filters. When the intracavity et... A continuous-wave all-solid-state tunable Ti:sapphire laser with compact configuration is presented. The frequency-tuning range extends from 760 to 825 nm by rotating the birefringent filters. When the intracavity etalon is locked on tile oscillating frequency of the laser and the length of the resonator is scanned by the piezo- electric ceramics transducer, a maximal continuous frequency-tuning range of 15.3 GHz is realized. The obtained Ti:sapphire laser is successfully applied to scan the saturation absorption spectroscopy of D1 transitions of SrRb atoms around the wavelength of 794.97 nm. 展开更多
关键词 Absorption spectroscopy Etalons Locks (fasteners) Piezoelectric ceramics SAPPHIRE solid state lasers
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Measurement of tropospheric CO_2 and aerosol extinction profiles with Raman lidar 被引量:6
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作者 赵培涛 张寅超 +4 位作者 王莲 曹开法 苏嘉 胡顺星 胡欢陵 《Chinese Optics Letters》 SCIE EI CAS CSCD 2008年第3期157-160,共4页
A prototype Raman lidar was designed for monitoring tropospheric CO2 profile and other scientific investigations. The third harmonic of Nd:YAG laser (354.7-nm wavelength) was used as stimulated light source to prov... A prototype Raman lidar was designed for monitoring tropospheric CO2 profile and other scientific investigations. The third harmonic of Nd:YAG laser (354.7-nm wavelength) was used as stimulated light source to provide nighttime measurements. Filter with high rejection ratio performance was used to extract CO2 Raman signals from Rayleigh-Mie scattering signals effectively. To improve the real time monitoring function, a two-channel signal collection system was designed to collect CO2 and N2 Raman scattering signals simultaneously. The N2 Raman scattering signals were used to retrieve aerosol extinction coefficient. Typical features of CO2 concentration profile and aerosol extinction coefficient in Hefei were presented. The mixing ratio of atmospheric CO2 in Hefei can reach about 360 - 400 ppmv. 展开更多
关键词 AEROSOLS Carbon dioxide Light sources Raman scattering solid state lasers
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Linearly polarized operation of Yb-doped fiber laser by Brewster's angle-polished fiber end 被引量:5
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作者 刘侠 杜松涛 +6 位作者 周军 董景星 魏运荣 袁志军 王炜 苏宙平 楼祺洪 《Chinese Optics Letters》 SCIE EI CAS CSCD 2010年第2期184-186,共3页
A new method to obtain linear polarization operation by Brewster's angle-polished fiber end is demonstrated. By using the special polarization operation technique together with introducing a narrow-linewidth fiber gr... A new method to obtain linear polarization operation by Brewster's angle-polished fiber end is demonstrated. By using the special polarization operation technique together with introducing a narrow-linewidth fiber grating into the laser cavity, a cladding-pumped linear polarization and single-transverse-mode (M2 〈 1.1) Yb-doped fiber laser with narrow linewidth whose full-width at half-maximm (FWHM) is less than 0.2 nm, is obtained in a simple configuration. The output power is up to 10 W which is continuous- wave output at 1085 nm, and the slope efficiency is 63% with respect to the coupled pump power and 75% with respect to the absorbed pump power, respectively. The measured 21-dB polarization extinction ratio does not degrade with the output power. The simplicity of such an approach is highly beneficial for a number of applications, including the use of a fiber laser for the nonlinear wavelength conversion (especially for the intracavity frequency doubling) and for the coherent and spectral beam combination. 展开更多
关键词 Fibers Laser cladding Polarization Pumping (laser) PUMPS Single mode fibers solid state lasers YTTERBIUM
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