使用氮化镓蓝色激光二极管泵浦的 Pr3+:LiYF4 晶体进行绿色脉冲再生放大。

IF 3.2 2区 物理与天体物理 Q2 OPTICS
Optics express Pub Date : 2024-11-04 DOI:10.1364/OE.541513
Hiroyuki Yada, Yuki Ichikawa
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引用次数: 0

摘要

利用掺杂 Pr3+ 的 LiYF4 晶体,在氮化镓蓝色激光二极管的泵浦下,研究了绿色脉冲(522 nm)的直接再生放大。亚皮秒(sub-ps)和亚纳秒(sub-ns)两种不同时长的绿脉冲是由重复频率为 100.86 kHz 的锁模掺镱光纤激光器产生的二次谐波制备的,并用作放大过程比较的种子。对于亚 ps (0.63 ps) 和亚 ns (0.3-0.4 ns) 种子,放大后的脉冲能量分别为 1.25 µJ 和 1.53 µJ,带宽分别为 0.60 nm 和 0.27 nm,光束质量分别为 (M2x = 2.26, M2y = 1.25) 和 (M2x = 1.47, M2y = 1.23)。B 积分的比较证实,亚 ps 种子放大与亚 ns 种子放大相比,带宽更宽,光束质量更低,这是由于亚 ps 放大的非线性效应造成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Green pulse regenerative amplification using a Pr3+:LiYF4 crystal pumped by GaN blue laser diodes.

Direct regenerative amplifications of green pulses (522 nm) were investigated using a Pr3+-doped LiYF4 crystal pumped by GaN blue laser diodes. Green pulses with two different temporal duration regimes, i.e. sub-picosecond (sub-ps) and sub-nanosecond (sub-ns), were prepared from the second harmonic generation of the mode-locked Yb3+-doped fiber laser at the repetition rate of 100.86 kHz and used as a seed for the comparison of the amplification processes. For the sub-ps (0.63 ps) and sub-ns (0.3-0.4 ns) seeds, the amplifications resulted in 1.25 µJ and 1.53 µJ in the pulse energies, 0.60 nm and 0.27 nm bandwidths, and the beam qualities of (M2x = 2.26, M2y = 1.25) and (M2x = 1.47, M2y = 1.23), respectively. A comparison of the B integrals confirmed that the wider bandwidth and the lower beam quality of the sub-ps seed amplification versus the sub-ns seed amplification were caused by the nonlinear effects in the sub-ps amplification.

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来源期刊
Optics express
Optics express 物理-光学
CiteScore
6.60
自引率
15.80%
发文量
5182
审稿时长
2.1 months
期刊介绍: Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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