共查询到20条相似文献,搜索用时 31 毫秒
1.
Yuxin Leng Lihuang Lin Wenyao Wang Yunhua Jiang Bin Tang Zhizhan Xu 《Optics & Laser Technology》2003,35(6):425-429
A birefringent crystal quartz plate of known thickness has been used as a spectral filter for spectral shaping in a Ti:sapphire regenerative amplifier. The spectral profile of the amplified pulse ejected from the regenerative amplifier was observed while adjusting the birefringent crystal plate in the cavity. By altering the gain spectrum, the bandwidth of the regeneratively amplified pulse was increased from 18 to 35 nm by using a 0.34-mm thick birefringent plate. The output pulse spectrum from the regenerative amplifier neared the bandwidth of the seed pulse. As a comparison, we used a coated filter outside the regenerative amplifier cavity, and the bandwidth of the regeneratively amplified pulse was stretched to 28 nm. When the bandwidth was stretched to 35 nm, the pulse was compressed to 35 fs. 相似文献
2.
针对啁啾脉冲放大技术建成的钛宝石激光装置,提出一种获得高重复率激光脉冲列的方法.通过改变钛宝石再生放大器中泡克耳斯盒电光开关的传统工作模式,使得腔内放大的脉冲从某特定时刻起,每当在腔内往返一次就以一定的倒出比例(倒出率)倒出腔内脉冲能量的一部分,从而可以在有限的时间段内产生高重复率的啁啾激光脉冲列.基于Franz-Nodvik放大理论,建立了该高重复率再生放大器的理论模型,通过数值计算,系统地分析了初始增益、倒出时刻、倒出率对输出的脉冲序列的影响.在抽运功率为35mJ、倒出率为1/2的实验条件下,通过腔外的脉冲数量选择器,在一个抽运周期内的有限时间段内已获得了14个幅度相近、单脉冲能量约为0.02mJ、重复率为100MHz的啁啾脉冲序列.从此啁啾脉冲列中选取数个脉冲,通过10TW级的激光系统放大和压缩,已获得100MHz重复率的飞秒太瓦级脉冲列.
关键词:
高重复率
多通放大
啁啾脉冲放大
钛宝石激光器 相似文献
3.
We present a diode-pumped, chirped-pulse Yb:S-FAP regenerative amplifier. This regenerative amplifier was developed as a first amplifier in an all-solid-state Yb:S-FAP laser system for laser-Compton X-ray generation. The amplifier delivers pulse energies above 24 mJ at a repetition rate of 50 Hz. Pulse compression reduces pulse widths to approximately 2.0 ps. 相似文献
4.
High-energy, diode-pumped, picosecond Yb:YAG chirped-pulse regenerative amplifier for pumping optical parametric chirped-pulse amplification 总被引:1,自引:0,他引:1
Akahane Y Aoyama M Ogawa K Tsuji K Tokita S Kawanaka J Nishioka H Yamakawa K 《Optics letters》2007,32(13):1899-1901
A diode-pumped, cryogenic-cooled Yb:YAG regenerative amplifier utilizing gain-narrowing has been developed. A 1.2-ns chirped-seed pulse was simultaneously amplified and compressed in the regenerative amplifier, which generated a 35-ps pulse with ~8-mJ of energy without a pulse compressor. Second-harmonics of the amplified pulse was used to pump picosecond two-color optical parametric amplification. 相似文献
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6.
文章报导了基于大基模体积的高能量飞秒钛宝石激光再生放大器的设计与实验研究,在重复频率10 Hz、抽运能量60 mJ的激励下,得到了单脉冲能量17.4 mJ的种子脉冲放大结果,压缩后的脉冲宽度为40.6 fs,能量为13.9 mJ.借助于此大基模体积再生腔,仅增加一级多通放大,实现了峰值功率达1.9 TW飞秒激光脉冲输出.结果表明,大模体积再生放大不仅降低了后续放大对抽运能量的要求,也可以单独压缩实现再生腔直接输出10 mJ量级的飞秒激光脉冲,是大能量高峰值功率飞秒激光系统的优质前端. 相似文献
7.
A single 30 ps pulse from a passively mode-locked Nd:YAG oscillator was synchronized with a longer pulse of 3–5 ns from a Nd:YAG regenerative amplifier. Jitter between the two pulses was found to be negligible over a wide range of energies injected into the regenerative amplifier. 相似文献
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9.
利用超短脉冲放大过程中的光谱增益窄化效应以及标准具的滤波作用,提出了基于再生放大器的多脉冲相干叠加方案,并对该方案在多脉冲叠加阶段的工作原理进行了分析;在小信号增益区内,对多个超短脉冲相干叠加进行了理论分析和数值计算,数值模拟的结果表明,影响形成窄带平顶长脉冲的基本关系为子脉冲宽度、再生放大器中的损耗及其与振荡器的长度失配量对构成脉冲时间波形影响很大,而对其频谱影响很小;叠加脉冲个数、标准具的通带宽度对构成脉冲波形和光谱均有影响.
关键词:
超短脉冲
多脉冲叠加器
窄带平顶长脉冲
数值计算 相似文献
10.
M. Delaigue I. Manek-Hönninger F. Salin C. Hönninger P. Rigail A. Courjaud E. Mottay 《Applied physics. B, Lasers and optics》2006,84(3):375-378
We report a diode-pumped high-repetition-rate chirped-pulse Yb:KGW regenerative amplifier delivering tens of microjoules pulse energy at repetition rates of up to 300 kHz. High repetition rates are obtained by using an acousto-optic modulator as switching element in the regenerative amplifier cavity. The output pulses were compressed down to 600 fs pulse duration. Even shorter pulses in the 100 fs range are obtained using an amplifier configuration without chirped pulse amplification. PACS 42.55.Xi; 42.60.Da; 42.65 Re 相似文献
11.
We are currently developing a high-efficiency Yb:YAG regenerative amplifier pumped by CW diode lasers. The performance of
the regenerative amplifier was estimated by theoretical calculations. For the excitation process, a rate equation was numerically
integrated over the repetition interval with CW pumping. For the regenerative pulse amplification process, the Frantz-Nodvik
equation was applied for each pass. The result of the theoretical calculation was compared with experimental data of a 2 mJ
output pulse energy at a 10 kHz repetition rate. An optical-optical conversion efficiency of 17.8% was achieved. The outline
of a prototype under development for a commercial product is also mentioned 相似文献
12.
A diode-pumped, cryogenically cooled Yb:LuLiF(4) regenerative amplifier has been developed for the first time to our knowledge. A chirped-seed pulse was amplified and compressed in the regenerative amplifier, simultaneously, which generated approximately 6 mJ, 13 ps pulses at 999 nm in wavelength without a pulse compressor. Simultaneous lasing at 999 and 1024 nm, respectively, was demonstrated, which could be used for different frequency generation in the terahertz region. 相似文献
13.
X. Zhou T. Kanai D. Yoshitomi T. Sekikawa S. Watanabe 《Applied physics. B, Lasers and optics》2005,81(1):13-17
The spectral width of a 5-kHz Ti:sapphire laser system was broadened by spectral control in a regenerative amplifier consisting of broadband chirped mirrors. The dispersion over the wide spectral range was compensated by a deformable mirror along with a genetic algorithm, resulting in a pulse width of 15 fs. The pulse width is the shortest, to our knowledge, in chirped pulse amplification systems with a regenerative amplifier. The phase distortion of broadband frequency doubling in addition to the Ti:sapphire laser was compensated by using the self-diffraction intensity in sapphire as the feedback signal into the genetic algorithm, resulting in a pulse width of 7.5 fs. The average power of the second harmonic was 1 W with a fundamental input of 7 W. 相似文献
14.
The visible second harmonic of the idler output from a noncollinear optical parametric amplifier was compressed using adaptive dispersion control with a deformable mirror. The amplifier was pumped by and seeded in the signal path by a common 400 nm second-harmonic pulse from a Ti:sapphire regenerative amplifier. Thus, both the idler output and the second harmonic of the idler were passively carrier-envelope phase stabilized. The shortest pulse duration achieved was below 3 fs. 相似文献
15.
We present the design and experimental results for a diode pumped Nd:YLF regenerative amplifier applied to amplify a nanosecond laser pulse. Numerical simulation shows that the maximum output energy and the best stability can be obtained when the regenerative amplifier operates in a saturated mode for all pulse duration and temporal profiles. Using extra post-pulse is a good method to decrease the square-pulse distortion caused by gain saturation effect. The amplifier shows output energy of 4.2mJ with a total energy gain of more than 10^7 and output energy stability of better than 1% rms. When extra post-pulse is added, square-pulse distortion is decreased from 1.33 to 1.17 for the amplifier that is seeded with an optical pulse of 3ns. 相似文献
16.
ZHU Xiaolei XU Shixiang LIU Yupu SHEN Xiaohua ZHANG Yinghua WANG Liushui LIN Zunqi 《Chinese Journal of Lasers》1998,7(4):298-302
The design and performance of a Ti:sapphire regenerative amplifier operating at 1. 056 μm are described. A laser pulse with an initial pulsewidth of 100 fs is amplified to ≥1.5 mJ in the amplifier after firstly stretched to 850 ps. The amplified pulse can be re-compressed to ~300 fs with energy of ~1 mJ. Loss of the spectrum happens in the regenerative cavity since bandwidth of the coat of optics in the cavity is not enough adequate. 相似文献
17.
High energy and long pulse generation with high-birefringence photonic crystal fibre and laser-diode pumped regenerative amplifier 下载免费PDF全文
We report on the generation of a high energy and long
pulse for pumping optical parametric chirped-pulse amplification
(OPCPA) by a high-birefringence photonic crystal fibre (HB-PCF) and
a laser-diode-pumped regenerative chirped pulse amplifier. Using the
femtosecond pump pulse centred at 815~nm, a 1064~nm soliton pulse is
produced in the HB-PCF. After injecting it into an Nd:YAG
regenerative amplifier with the glass etalons, a narrow-band
amplified pulse with an energy of $\sim $4~mJ and a duration of 235
ps is achieved at a repetition rate of 10~Hz, which is suitable for
being used as a pump source in the 800~nm OPCPA system. 相似文献
18.
We demonstrate the direct generation of 12 fs pulses from a Ti:sapphire regenerative amplifier system at a 1 kHz repetition rate utilizing properly designed broadband components for chirped-pulse amplification. Optimized designs of a regenerative amplifier with a multilayer gain-narrowing compensator and an adaptive dispersion compensator with a spatial light modulator contribute to the shorter pulse amplification. 相似文献
19.
A diode-pumped chirped-pulse regenerative amplifier with a cooled Yb:YLF crystal has been developed. The output pulse energy is 30 mJ at 20-Hz repetition rate. A high effective extraction efficiency of 68% is obtained, which is attributed to reduced saturation fluence at low temperature and to a high effective pulse energy fluence during regenerative amplification. After pulse compression by use of a parallel grating pair, 18-mJ pulse energy and 795-fs pulse duration are obtained. 相似文献