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1.
Diode-end-pumped passively mode-locked Nd:LuVO4 laser with a semiconductor saturable-absorber mirror
H.H. Yu H.J. Zhang D.Y. Tang Z.P. Wang J.Y. Wang Y.G. Yu G.Q. Xie H. Luo M.H. Jiang 《Applied physics. B, Lasers and optics》2008,91(3-4):425-428
A diode pumped passively mode-locked Nd:LuVO4 laser with a semiconductor saturable-absorber mirror (SESAM) is demonstrated. The mode-locked pulses have a pulse duration of about 8.8 ps and a repetition rate of 157 MHz. Under an absorbed pump power of 12 W a maximum output power of 3.71 W is obtained, which gives an optical conversion efficiency of 31%. Our results show that Nd:LuVO4 is a promising gain medium for the high power mode-locked solid-state lasers. 相似文献
2.
We demonstrate what is to our knowledge the first mode-locked Nd:YVO4 laser operating on the 4F3/2-4I9/2 transition at 914 nm. Using a semiconductor saturable-absorber mirror for passive mode locking, we have obtained 3-ps pulses at a repetition rate of 233.8 MHz. The laser is based on a standard delta cavity and is pumped by a Ti:sapphire laser. We obtained an average output power of 42 mW through one mirror and an accumulated output power of approximately 150 mW (through all cavity mirrors) at a pump power of 1.4 W. 相似文献
3.
H. Ge S. Zhao Y. Li G. Li D. Li K. Yang M. Li G. Zhang K. Cheng Z. Yu 《Laser Physics》2009,19(6):1226-1229
We present a compact passively Q-switched mode-locked Nd:LuVO4 laser run in a Z-type folded cavity with semiconductor saturable absorber mirror (SESAM). The repetition rates of the passively Q-switched pulse envelope ranges from 22.99 to 141.18 kHz as the pump power increased from 2.372 to 8.960 W. The repetition rates of mode-locked laser pulses in the Q-switched pulse envelope has 111 MHz determined by the cavity length and the mode-locked pulse duration is evaluated to be 257 ps. An average output power of 823.5 mW is achieved at the pump power of 8.96 W, corresponding to an optical conversion efficiency of 9.2%. 相似文献
4.
B. Y. Zhang J. L. Xu G. J. Wang J. L. He W. J. Wang Q. L. Zhang D. L. Sun J. Q. Luo S. T. Yin 《Laser Physics》2012,22(4):699-702
The mode-locking operation of the Nd:GGG crystal with a semiconductor saturable absorber mirror (SESAM) was demonstrated.
Continuous wave (CW) mode-locking was obtained with the pulse duration of 11 ps and the pulse repetition rate of 40.38 MHz.
At 7 W of pump power, the maximum average output power of 1.1 W was obtained with the slope efficiency of 18.1%. 相似文献
5.
This paper demonstrates the passively mode-locked Nd:GdVO4 laser operating on the ^4F3/2-^4I9/2 transition at 912 nm by using a semiconductor saturable-absorber mirror for passive mode locking, stable continuous wave modelocked 912nm laser was achieved with a repetition rate of 176 MHz. At the incident pump power of 17.7W, 22.6mW average output power of stable mode-locked laser was obtained with a slope efficiency of 0.3%. 相似文献
6.
采用Nd∶Gd0.1Y0.9VO4晶体作为增益介质和Z形腔结构,分析比较了腔内加入自行设计的镀和不镀高反膜的半导体可饱和吸收镜(SESAM)对激光锁模的影响.在腔内加入镀膜SESAM后,激光锁模阈值由1.69W下降为1.45W,并且锁模更稳定.在2W抽运功率下,在1064nm中心波长处获得了双端250mW的连续锁模输出,光光转换效率为12.5%,重复频率为142.25MHz.
关键词:
0.1Y0.9VO4激光器')" href="#">Nd∶Gd0.1Y0.9VO4激光器
半导体可饱和吸收镜
连续锁模 相似文献
7.
G.J. Spühler T. Südmeyer R. Paschotta M. Moser K.J. Weingarten U. Keller 《Applied physics. B, Lasers and optics》2000,71(1):19-25
We discuss power scaling of passively mode-locked lasers using multiple laser heads in the resonator. We experimentally compared two different approaches for the cavity design, both using three side-pumped Nd:YAG laser heads. We obtained a record-high average output power of up to 27 W with close to diffraction-limited beam quality, a pulse duration of 19 ps, a pulse energy of 0.5 7J, and 23 kW peak power. Single-pass second-harmonic generation in a 10-mm-long LBO crystal yields 16.2 W of 532-nm radiation. 相似文献
8.
A xenon flash-lamp-pumped, passively Q-switched Nd:GdVO4 laser with GaAs semiconductor saturable absorber is demonstrated. The static laser performance is investigated and the static output is 52 mJ when the pump energy is 9.45 J. The dynamic laser has the highest slope efficiency when the GaAs wafer is both the saturable absorber and output coupler. Pulses with duration of 64 ns and dynamic output of 47.6 mJ are obtained when the pump energy is 9.45 J. The highest dynamic–static ratio is 0.9:1. The coupled rate equations are used to simulate the Q-switched process of laser. The theoretical and experimental results are compared and discussed. 相似文献
9.
10.
We have demonstrated an efficient and compact passively Q-switched and mode-locked (QML) 1064 nm Nd:YVO4 laser by using a low temperature grown GaAs (LT-GaAs) saturable absorber as well as an output coupler. Stable QML with envelope duration as short as 10 ns and Q-switched repetition rate of 36 kHz was obtained. It is the shortest envelope duration as far as we know, and it is so short that it can be used as Q-switching pulses directly. At 6.9 W of the incident pump power, average output power of 1.24 W was achieved and the corresponding peak power and energy of a single Q-switched pulse were 3.44 kW and 34.4 μJ, respectively. The mode-locked pulses inside the Q-switched pulse envelope had a repetition rate of 780 MHz. 相似文献
11.
Chao Han Shengzhi Zhao Dechun Li Guiqiu Li Kejian Yang Gang Zhang Kang Cheng 《Optics & Laser Technology》2012,44(3):696-700
By considering the single-photon absorption (SPA) and two-photon absorption (TPA) processes in the GaAs saturable absorber, the coupled rate equations for a diode-pumped passively Q-switched and mode-locked (QML) laser with GaAs coupler under Gaussian approximation are given. The key parameters of an optimally coupled passively QML laser can be obtained by numerically solving these equations. These key parameters include the parameters of the gain medium, the saturable absorber and the resonator, which can maximize the pulse energy of singly Q-switched envelope. Sample calculations for a diode-pumped passively Q-switched mode-locked c-cut Nd:GdVO4 laser with a GaAs saturable absorber are presented to demonstrate the optimal method applicable. 相似文献
12.
Liang W Ilchenko VS Savchenkov AA Matsko AB Seidel D Maleki L 《Physical review letters》2010,105(14):143903
We report on the observation of a mode-locked laser generated with a crystalline whispering gallery mode resonator pumped with a continuous wave laser. Optical pumping of the resonator generates an optical frequency comb with phase locked components at the Raman offset of the resonator host material. Phase locking of the modes is confirmed via measurement of the radio-frequency beat note produced by the comb on a fast photodiode. Neither the conventional Kerr comb nor hyperparametric oscillation is observed when the comb is present. We present a theoretical explanation of the effect. 相似文献
13.
G. Zhang S. Zhao Y. Li G. Li D. Li K. Yang T. Li K. Cheng H. Ge Y. Zhang Z. Yu 《Laser Physics》2010,20(6):1307-1311
A diode-pumped Q-switched and mode-locked (QML) Nd:LuVO4/KTP green laser with acousto-optic modulator (AOM) and Cr4+:YAG saturable absorber is presented. By inserting an AOM into the laser cavity, the stability of the QML green laser pulse with AO and Cr4+:YAG is improved, the modulation depth is increased and the pulse width of Q-switched pulse envelope is significantly compressed in comparison with that of the singly passively QML green laser with Cr4+:YAG. The experimental results show that the peak power of the doubly QML green laser pulse is much higher than that of the singly passively QML green laser pulse. 相似文献
14.
Diode-pumped continuous-wave Nd:LuVO4 laser operating at 916 nm 总被引:1,自引:0,他引:1
We realized an efficient diode-pumped Nd:LuVO4 continuous-wave (CW) laser operating at 916 nm. Laser experiments with 0.5 at. % Nd-doped Nd:LuVO4 crystals of various lengths and cutting directions were also investigated. The maximum output power of 930 mW was obtained with a slope efficiency of 27.2% and an optical conversion efficiency of 20.8% at the absorbed pump power of 4.5 W. The laser experiment shows that Nd:LuVO4 crystal can be used for an efficient diode-pumped laser system. 相似文献
15.
Shi-Xia Li Gui-Qiu Li Sheng-Zhi Zhao Xiao-Mei Wang Ke-Jian Yang De-Chun Li Wen-Chao Qiao Hai-Juan Zhang Tian-Li Feng Hong-Wei Chu 《Optical and Quantum Electronics》2014,46(9):1179-1186
By using GaAs wafer as the saturable absorber, the laser-diode pumped passively Q-switched composite Nd:YVO \(_{4}\) laser has been successfully demonstrated. For this passively Q-switched operation, the average output power obtained is as high as 846 mW at the incident pump power of 5.31 W, while the pulse duration is as short as 14.5 ns. The largest single-pulse energy of 2.49 \(\upmu \) J and the highest peak power of 166 W are obtained. The GaAs saturable absorber with thickness of 400 \(\upmu \) m has shown more excellent laser performance comparing with 700 \(\upmu \) m thick GaAs. 相似文献
16.
We have demonstrated passively Q-switched mode-locked all-solid-state Nd:YLF laser with an uncoated GaAs wafer as saturable absorber and output mirror simultaneously. Q-switched mode-locking pulses laser with about 100% modulation depth were obtained. The average output power is 890 mW at the incident pump power of 5.76 W, corresponding to an optical slop efficiency of 20%. The temporal duration of mode-locked pulses was about 21 ps. At the Q-switched repetition rate of 30 kHz, the energy and peak power of a single pulse near the maximum of the Q-switched envelope was estimated to be about 1.6 μJ and 76 kW. 相似文献
17.
By using the mixed crystals Nd:Lu0.33Y0.37Gd0.3VO4, Nd:Lu0.5Y0.5VO4 and Nd:Lu0.15Y0.85VO4 as laser media, the LD pumped passively Q-switched and mode-locked (QML) lasers with GaAs saturable absorber are realized. The average output power, the pulse width and the repetition rates have been measured and compared. The experimental results show that the passively Q-switched and mode-locked Nd:Lu0.33Y0.37Gd0.3VO4 laser can generate shorter pulse width with higher peak power due to broader fluorescence line-width. By considering the Gaussian distribution of the intracavity photon density and the influence of the continuous pump rate, the coupled rate equations for QML lasers with GaAs saturable absorber are given. The theoretical solutions of the equations are in agreement with the experimental results. 相似文献
18.
19.
Received August 11, 2003 We report continuous-wave and actively Q-switched laser performance achieved with Nd:LuVO4 crystal for the 4F(3/2) --> 4I(1/2) transition (corresponding wavelength of 1065.8 nm) under high-power diode pumping. Continuous-wave output power of 12.55 W is obtained with an optical conversion efficiency of 50.2%. In actively Q-switched operation the average output power reaches 5.42 W at a pulse repetition frequency of 40 kHz with 18 W of pump power incident upon the crystal, yielding an optical conversion efficiency of 30.1%. The pulse energy and peak power reach 138 microJ and 16.2 kW, respectively, at a pulse repetition frequency of 25 kHz under a pump power of 14.2 W; the pulse duration is 8.5 ns. 相似文献
20.
High-power diode-pumped Q-switched and mode-locked Nd:YVO(4) laser with a Cr(4+):YAG saturable absorber 总被引:3,自引:0,他引:3
We demonstrate a high-power passively Q -switched and mode-locked Nd:YVO(4) laser with a Cr(4+):YAG saturable absorber. 2.7 W of average power with an 18-kHz Q -switched repetition rate was generated at a 12.5-W pump power. The peak power of a single pulse near the maximum of the Q -switched envelope was greater than 100 kW. 相似文献