Green pulsed lidar-radar emitter based on a multipass frequency-shifting external cavity

Zhang Haiyang; Brunel Marc; Romanelli Marco; Vallet Marc

首页> 外文期刊>Applied optics >Green pulsed lidar-radar emitter based on a multipass frequency-shifting external cavity

【24h】

Green pulsed lidar-radar emitter based on a multipass frequency-shifting external cavity

机译：基于多汇款频率移位外腔的绿色脉冲激光雷达发射器

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

This paper investigates the radio frequency (RF) up-conversion properties of a frequency-shifting external cavity on a laser beam. We consider an infrared passively Q-switched pulsed laser whose intensity modulation results from the multiple round-trips in the external cavity, which contains a frequency shifter. The output beam undergoes optical second-harmonic generation necessary to reach the green wavelength. We model the pulse train using a rate-equation model to simulate the laser pulses, together with a time-delayed interference calculation taking both the diffraction efficiency and the Gaussian beam propagation into account. The predictions are verified experimentally using a diode-pumped Nd:YAG laser passively Q-switched by Cr4+:YAG whose pulse train makes multiple round-trips in a mode-matched external cavity containing an acousto-optic frequency shifter driven at 85 MHz. Second-harmonic generation is realized in a KTP crystal, yielding RF-modulated pulses at 532 nm with a modulation contrast of almost 100%. RF harmonics up to the 6th order (1.020 GHz) are observed in the green output pulses. Such a RF-modulated green laser may find applications in underwater detection and ranging. (C) 2016 Optical Society of America

机译：本文研究了激光束上的频移外腔的射频（RF）上转换特性。我们考虑一种红外被动Q开关脉冲激光器，其强度调制由外腔中的多个圆形跳闸导致，其包含频率移位器。输出光束经过所需的光学二次谐波发电以达到绿色波长。我们使用速率方程模型模拟脉冲序列来模拟激光脉冲，以及时间延迟的干扰计算，取得衍射效率和高斯光束传播。通过CR4 +：YAG激光通过CR4 +切换的二极管泵浦的Nd：YAG切换，其脉冲序列在包含在85MHz驱动的模式匹配的外腔中进行多个往复运动的YAG激光，其验证了预测。在KTP晶体中实现了二次谐波产生，在532nm处产生RF调制脉冲，其调节对比度为近100％。在绿色输出脉冲中观察到第6阶的RF谐波（1.020 GHz）。这种RF调制的绿色激光可以在水下检测和测距中找到应用。（c）2016年美国光学学会

著录项

来源
《Applied optics》 |2016年第10期|共7页
作者
Zhang Haiyang; Brunel Marc; Romanelli Marco; Vallet Marc;
展开▼
作者单位

Beijing Inst Technol Sch Optoelect 5 South Zhongguancun St Beijing 100081 Peoples R China;

Univ Rennes 1 Inst Phys Rennes CNRS UMR 6251 Campus Beaulieu F-35042 Rennes France;

Univ Rennes 1 Inst Phys Rennes CNRS UMR 6251 Campus Beaulieu F-35042 Rennes France;

Univ Rennes 1 Inst Phys Rennes CNRS UMR 6251 Campus Beaulieu F-35042 Rennes France;

展开▼
收录信息
原文格式 PDF
正文语种 eng
中图分类应用;
关键词

Green pulsed lidar-radar emitter based on a multipass frequency-shifting external cavity

摘要

著录项

相关主题

期刊订阅