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Monoblock laser for a low-cost, eyesafe, microlaser range finder

机译：整体激光器，低成本，人眼安全，微激光测距仪

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摘要

A small, lightweight, low-cost prototype laser has been developed for use in a microlaser range finder (μLRF). The laser design is based on a flash-lamp-pumped, Nd:YAG laser with a Cr~(4+) passive Q switch. The design incorporates a monolithic potassium titanyl arsenide (KTA) optical parametric oscillator (OPO) in an intracavity configuration, producing output at 1.54 μm. Precisely cut, properly coated crystals make up the laser resonator, reducing the number of components and enabling laser oscillation with the simplest of alignment fixtures. The 1.54-μm laser cavity consists of only four rectangular-shaped crystals: a Nd:YAG laser rod, a Nd:YAG endcap, a Cr~(4+) Q switch, and a KTA OPO. Along with a ceramic laser pallet and a flash lamp, these six components make up a prototype monoblock (essentially a one-piece) laser transmitter. Several of these simple prototypes have been built and tested, giving a nominal output of>3.0 mJ at 1.54 μm with a 27-ns pulse width. The transmitter was incorporated into a breadboard laser range finder, and successful ranging operations were performed to targets at ranges in excess of 3 km.
机译：已经开发出一种小型，轻巧，低成本的原型激光器，用于微激光测距仪（μLRF）。该激光器的设计基于带有Cr〜（4+）无源Q开关的闪光灯泵浦Nd：YAG激光器。该设计在腔内配置中集成了单片钛氧基砷化钾（KTA）光学参量振荡器（OPO），可产生1.54μm的输出。精确切割，适当涂层的晶体组成了激光谐振器，从而减少了组件数量，并通过最简单的对准夹具实现了激光振荡。 1.54μm的激光腔仅包含四个矩形晶体：Nd：YAG激光棒，Nd：YAG端盖，Cr〜（4+）Q开关和KTA OPO。这六个组件与陶瓷激光托盘和闪光灯一起构成了原型整体式（基本上是一件式）激光发射器。已构建并测试了其中几个简单的原型，它们在1.54μm处以27 ns的脉冲宽度提供了大于3.0 mJ的标称输出。该发射器被整合到面包板激光测距仪中，并成功对超过3 km的目标进行了测距操作。

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