共查询到20条相似文献,搜索用时 62 毫秒
1.
S. Schwertfeger A. Klehr T. Hoffmann A. Liero H. Wenzel G. Erbert 《Applied physics. B, Lasers and optics》2011,103(3):603-607
Using a single-stage all-semiconductor master oscillator-power amplifier system, consisting of a Q-switched distributed Bragg
reflector laser as master oscillator and a tapered power amplifier, we generate laser pulses with a length of 80 ps and a
peak power of 50 W. The spectral width is less than 1 nm around a center wavelength of 1066 nm. The background of the amplified
spontaneous emission is significantly reduced due to a pulsed, instead of continuous-wave operation of the amplifier. The
current pulses have a width of approximately 10 ns and a repetition frequency of 1.25 MHz. 相似文献
2.
采用主振荡功率放大的方式,研制成功集宽带波长连续可调谐、带宽内输出功率谱均衡、高重复频率和高功率性能于一体的超短脉冲包层抽运铒镱共掺光纤激光器.将优化主振荡器和功率放大器的腔结构与掺铒光纤的饱和增益特性结合起来,实现了1535nm—1570nm(35nm带宽)的输出功率均衡的波长连续可调谐激光输出,在带宽内激光功率的最大波动仅为0.5dBm;带宽内平均输出功率大于2W、脉冲重复频率大于10GHz、脉冲宽度小于30ps.该激光器具有综合性能指标先进、结构简单、全光纤化、使用方便等优点.
关键词:
光纤激光器
包层抽运
短脉冲
高重复频率 相似文献
3.
《中国光学快报(英文版)》2016,(6)
We demonstrate a diode-pump Tm~(3+)t-doped all-fiber laser operating at 1908 nm based on a master oscillator power amplifier(MOPA) configuration. In our work, 152 W of laser output power is generated by a total incident pump power of 434 W at 790 nm, corresponding to the total optical efficiency of 35%. The laser wavelength is1908.29 nm. To the best of our knowledge, it is the highest output power reached around 1908 nm with such a narrow linewidth of 0.18 nm based on a MOPA configuration. 相似文献
4.
搭建了一台主振荡功率放大(MOPA)结构的单频脉冲全光纤激光器。通过对线宽为 20 kHz 的连续单频激光器进行强度调制,获得了重复频率 10 MHz、脉宽约 8 ns、平均功率约 0.5 mW 的单频脉冲种子激光。采用多级掺镱光纤放大器对脉冲种子激光进行级联放大,获得了平均功率 300.8 W 的高功率激光输出。目前,激光器输出功率仅受限于泵浦功率,有望通过增加泵浦功率进一步提高输出功率。 相似文献
5.
结温升高是影响主控振荡放大(MOPA)半导体激光芯片输出功率的重要因素,为解决MOPA芯片的多电极封装和高效散热问题,提出了一种正装和热扩散辅助次热沉相结合的封装结构。建立了该封装结构的3D热模型,对比研究了倒装封装结构、正装无辅助次热沉结构与正装有辅助次热沉结构对MOPA半导体激光器结温的影响。计算结果表明,采用正装有辅助次热沉结构与倒装封装结构散热性能接近,且显著优于正装无辅助次热沉结构,结温降低幅度最高可达40%。另外,采用正装有辅助次热沉封装结构的MOPA半导体激光芯片在连续工作条件下输出功率为10.5 W,谱宽可实现半高全宽小于0.1 nm,中心波长随电流的变化约14 pm/A,实现了10 W级MOPA芯片的封装,验证了该封装结构的有效性。 相似文献
6.
报道了一台全光纤结构主振荡功率放大(MOPA)型掺镱脉冲光纤激光器,以光纤光栅为腔镜,光纤型声光调Q的光纤激光器为种子源,通过两级掺镱双包层光纤放大器实现功率放大。对声光调Q的光纤激光器输出特性进行了研究,比较了不同泵浦波长、不同重复频率对激光输出功率和脉冲宽度的影响,并实现了最短脉冲宽度25 ns、单脉冲能量45 μJ的脉冲激光输出。在重复频率50 kHz时,对脉冲宽度130 ns、平均功率0.6 W的种子光进行放大,得到了平均功率102.5 W、脉冲宽度约240 ns的激光输出。 相似文献
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8.
We report experimental results on a 96.2 W all-fiberized nanosecond single-frequency masteroscillator power amplifier (MOPA)
laser working at 1064 nm. An external modulation fiber laser with average power of 0.5 mW and line width of 20 kHz is used
as the seed source. Amplifying the seed laser in four stages, a single-frequency laser with pulse duration of 10 ns and peak
power of 816.7 W is obtained. The average output power is up to 96.2 W. Further power-scaling of this MOPA structure can be
realized since our experiment is only pump-power limited. 相似文献
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10.
A compact tunable high power picosecond green laser pulse source based on frequency doubling of an Yb-doped fiber amplifier
seeded by a gain switch laser diode has been developed. The fiber amplifier generates the picosecond infrared pulses with
average power of 10.3 W, repetition rate of 1 MHz, pulse duration of 150 ps, and tunable range of 20 nm around 1064 nm. For
underwater use, the tunable output infrared pulses are frequency doubled into picosecond green laser pulses, which can be
tuned from 527 to 537 nm with average power of more than 1.1 W, corresponding to an overall conversion efficiency of 10.7%
by a BBO nonlinear crystal. This kind of laser source will have potential application for underwater optical communication. 相似文献
11.
The diode laser (LD) clad-pumped 1947.6 nm continuous wave (CW) Tm3+-doped fiber amplifier is reported using the master oscillation power amplifier (MOPA) method. The injected seed laser is
provided by an all-fiber LD-clad-pumped Tm3+-doped single-mode fiber laser, which has a nearly 2.4 W maximal output power and 0.1 nm ultra-narrow linewidth based on the
intracore reflection FBG. Using the 25/400 μm double-clad LMA Tm3+-doped fiber as the gain fiber, the output maximal output power is 30.6 W from the fiber amplifier, with a slope efficiency
of 39.1% respected to the LD total output power. A high power multi-mode fiber combiner is used to couple high power LD light
into the gain fiber. The output wavelength is also located at 1947.6 nm, with the slightly expanded laser linewidth of 0.2
nm. 相似文献
12.
High power diode-side-pumped 1 112-nm Nd:YAG laser based on master-oscillator power-amplifier system
Biaolong Liu Zhichao Wang Feng Yang Zhimin Wang Yong Bo Hongtao Yuan Lei Yuan Baoshan Wang Jialin Xu Yading Guo Qinjun Peng Jingyuan Zhang Dafu Cui Zuyan Xu 《中国光学快报(英文版)》2014,12(3):31404-49
We demonstrate a high power high beam quality diode-pumped 1 112-nm Nd:YAG master-oscillator power-amplifier (MOPA) laser system. To increase the extraction efficiency and output power, a four-pass amplifier scheme is employed. Finally, the injected laser output power is amplified from 26 to 64 W with beam quality factor M2=2.85. Furthermore, a theoretical model that takes the temporal overlap inversion number dynamics into account is employed to analyze the performance of the MOPA laser system, and a good agreement with the experimental data is obtained. 相似文献
13.
High power single frequency, single mode, linearly polarized laser output at the 1 μm regime is in demand for the interferometric gravitational wave detectors (GWDs). A robust single frequency solid state master oscillator power amplifier (MOPA) is a promising candidate for such applications. We present a single frequency solid state multistage MOPA system delivering 177 W of linearly polarized output power at 1 μm with 83.5% TEM(00) mode content. 相似文献
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15.
Zaytsev A. K. Wang C. -L. Lin C. -H. You Y. -J. Tsai F. -H. Pan C. -L. 《Laser Physics》2012,22(2):447-450
We report the performance of a picosecond master-oscillator power amplifier (MOPA) system based on a diode-pumped solid-state
(DPSS) seed laser and Yb-doped fiber amplifier. An average power of 28 W at ∼200 MHz repetition rate is achieved by using
only one amplification stage. We found that positive nonlinear phase shift induced by nonlinear effect in the active fiber
can be effectively compensated by a grating pair. A pulse duration of ∼1.6 ps is shown after recompression. 相似文献
16.
980-nm all-fiber mode-locked Yb-doped phosphate fiber oscillator based on semiconductor saturable absorber mirror and its amplifier 下载免费PDF全文
A 980-nm semiconductor saturable absorber mirror(SESAM) mode-locked Yb-doped phosphate fiber laser is demonstrated by using an all-fiber linear cavity configuration. Two different kinds of cavity lengths are introduced into the oscillator to obtain a robust and stable mode-locked seed source. When the cavity length is chosen to be 6 m, the oscillator generates an average output power of 3.5 m W and a pulse width of 76.27 ps with a repetition rate of 17.08 MHz. As the cavity length is optimized to short, 4.4-m W maximum output power and 61.15-ps pulse width are produced at a repetition rate of 20.96 MHz. The output spectrum is centered at 980 nm with a narrow spectral bandwidth of 0.13 nm. In the experiment, no undesired amplified spontaneous emission(ASE) nor harmful oscillation around 1030 nm is observed. Moreover,through a two-stage all-fiber-integrated amplifier, an output power of 740 m W is generated with a pulse width of 200 ps. 相似文献
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We report on high-power operation of a fiber distributed-feedback (DFB) laser fabricated from Tm-doped photosensitive alumino-silicate fiber and in-band pumped by an Er/Yb fiber laser at 1565 nm. The fiber DFB laser yielded up to 875 mW of single-ended output at 1943 nm on two orthogonally polarized modes for 3.5 W of absorbed pump power. Further scaling of the DFB laser output power was achieved with the aid of a simple Tm-doped fiber amplifier stage spliced directly to the DFB fiber without the need of an optical isolator. The maximum output power from the DFB laser and fiber amplifier was >3 W for a combined absorbed pump power of 8.1 W. The influence of thermal loading, owing to quantum defect heating in the Tm-doped core, on the output power and longitudinal mode behavior is discussed, and the prospects for further improvement in performance are considered. 相似文献
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We report on the development of a fiber-based laser transmitter designed for active remote sensing spectroscopy. The transmitter uses a master oscillator power amplifier (MOPA) configuration with a distributed feedback diode-laser master oscillator and an erbium-doped fiber amplifier. The output from the MOPA is frequency-doubled with a periodically poled potassium titanium oxide phosphate crystal. With 35 W of single-frequency peak optical pump power, 8 W of frequency-doubled peak power was achieved. The utility of this single-frequency, wavelength tunable, power scalable laser was then demonstrated in a spectroscopic measurement of diatomic oxygen A band. 相似文献