9 W Average Power, 150 kHz Repetition Rate Diamond Raman Laser at 1519 nm, Pumped by a Yb Fibre Amplifier
9 W Average Power, 150 kHz Repetition Rate Diamond Raman Laser at 1519 nm, Pumped by a Yb Fibre Amplifier
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DOI：
10.1109/cleoe-eqec.2019.8873181
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发表时间：
2019-06
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影响因子：
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通讯作者：
Ł. Dziechciarczyk;Zhi-Meng Huang;G. Demetriou;Dan Cheng;S. Pidishety;Yujun Feng;Yutong Feng;Guozheng Wang;H. Lin;Sheng Zhu;D. Lin;T. Hawkins;L. Dong;A. Kemp;J. Nilsson;V. Savitski
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文献类型：
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作者：
Ł. Dziechciarczyk;Zhi-Meng Huang;G. Demetriou;Dan Cheng;S. Pidishety;Yujun Feng;Yutong Feng;Guozheng Wang;H. Lin;Sheng Zhu;D. Lin;T. Hawkins;L. Dong;A. Kemp;J. Nilsson;V. Savitski
市售的 ∼1.5 μm 脉冲光纤激光器在成像、国防、通信和光雷达 (LIDAR) 领域有许多用途 [1]。对于3D扫描激光雷达，更高的信噪比需要具有高平均功率和高脉冲重复率（理想情况下几MHz）的激光器以实现更快的扫描速率，而为了提高距离分辨率则需要脉冲持续时间<10 ns [2,3]。 〜1.5 μm 脉冲光纤激光器的一个限制是缩放至高平均功率 [4]。 ∼1 μm 的高平均功率光纤主振荡器功率放大器 (MOPA) 系统的拉曼频率转换是一种潜在的替代方案。金刚石的大拉曼位移和拉曼增益允许两级拉曼转换为~1.5 μm，用于~1 μm 泵浦[5]。优异的热性能使金刚石适合高平均功率 [6]。使用金刚石将 1.064 μm 激光转换为 1.485 μm 激光已做了大量工作 [7]；然而，LIDAR 的“人眼安全”要求通常要求波长高于 1.5 μm，因为最大允许暴露限值要高出一个数量级 [8]。开发这种金刚石拉曼激光器（DRL）是这项研究的主要动机。
Commercially available pulsed fibre lasers at ∼1.5 μm have many uses in imaging, defense, communications and light radar (LIDAR) [1]. For 3D scanning LIDAR, higher signal-to-noise ratio requires lasers with high average power and high pulse repetition rate (ideally several MHz) for faster scanning rate, whereas to improve distance resolution requires pulse durations <10 ns [2,3]. One limitation of the pulsed fibre lasers at ∼1.5 μm is scaling to high average powers [4]. Raman frequency conversion of high average power fibre master oscillator power amplifier (MOPA) systems at ∼1 μm is a potential alternative. The large Raman shift and Raman gain of diamond allows two-stage Raman conversion to ∼1.5 μm for ∼1 μm pumping [5]. Excellent thermal properties make diamond suitable for high average powers [6]. Much work has been done on conversion of 1.064 μm lasers to 1.485 μm using diamond [7]; however, the "eye-safety" requirements for LIDAR typically call for wavelengths above 1.5 μm, due to the order of magnitude higher Maximum Permissible Exposure limit [8]. Developing such a diamond Raman laser (DRL) was the major motivation for this research.