中国激光, 2009, 36 (7): 1789, 网络出版: 2009-07-16
高效大功率全固态1.5 μm腔内光参量振荡器
Efficiency and High Power All-Solid-State 1.5 μm Intracavity Optical Parametric Oscillator
激光技术 光参量振荡 人眼安全波长 KTA晶体 全固态激光 laser technique optical parametric oscillator eye-safe wavelength KTA crystal all-solid-state lasers
摘要
基于KTA和KTP非线性光学晶体, 在全固态大功率1.5 μm光参量振荡(OPO)方面做了相关的实验研究, 将激光二极管(LD)侧面抽运Nd:YAG 1064 nm高功率激光模块应用于腔内KTA-OPO设计中, 获得了高效稳定的光参量输出。当重复频率为18 kHz时, 1.53 μm信号光功率和脉宽分别为13 W和5.46 ns, 3.4 μm休闲光输出功率为3 W。作为比较, 对基于KTP晶体的腔内光参量振荡特性也进行了实验研究。结果发现,由于KTA晶体在3.4 μm波段的吸收相对KTP晶体来说可以忽略, 热效应的影响大为降低, 可获得比KTP-OPO更高的输出功率和转换效率。
Abstract
The high power all solid state intracavity optical parametric oscillator (IOPO) at 1.5 μm eye-safe wavelength band based on KTA and KTP crystals is demonstrated. Under the repetition rate of 18 kHz, the optimum signal output power of 13 W at 1.5 μm with a 5.46 ns pulse width, and idler beam of 3 W at 3.4 μm were obtained using laser diode-side-pumped Nd:YAG 1064 nm high power laser as the KTA-IOPO pumping source. In addition, the characteristic of KTA-IOPO was compared with that of the similar crystal KTP. These results show that the absorption of 3.4 μm wavelength band in KTA was negligible compared with KTP crystal, allowing high-power and high-frequencey-conversion operation with minimal thermally induced refractive distortion in the OPO crystal.
何京良, 王瑞华, 黄海涛, 张百涛, 杨见飞, 董晓龙. 高效大功率全固态1.5 μm腔内光参量振荡器[J]. 中国激光, 2009, 36(7): 1789. He Jingliang, Wang Ruihua, Huang Haitao, Zhang Baitao, Yang Jianfei, Dong Xiaolong. Efficiency and High Power All-Solid-State 1.5 μm Intracavity Optical Parametric Oscillator[J]. Chinese Journal of Lasers, 2009, 36(7): 1789.
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