Compact Q-Switched Oscillator With Combined Nanosecond and Microsecond Pulse Outputs

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-04-22 DOI:10.1109/LPT.2025.3563194

Qian Ti;Wen-Quan Nie;Da-Fu Cui;Qi Bian;Nan Zong;Yong Bo;Qin-Jun Peng

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引用次数: 0

Abstract

We have developed a laser-diode side-pumped Q-switched Nd:YAG laser capable of generating combined pulses, consisting of high-peak-power nanosecond (ns) and microsecond (

$\mu $

s) pulses. In free-running mode, a maximum output power of 22.1 W was achieved at a 1 kHz repetition rate with a pulse duration of

$115~\mu $

s. By carefully adjusting the Q-switch trigger delay and the Q-switch opening time, a combined macro-pulse consisting of a single ns pulse and a

$\mu $

s pulse train was generated, where the ns pulse power ratio relative to the total combined pulse power can be adjusted from 45% to nearly 100%. The peak power of the ns pulse increases from 83 kW to 396.4 kW, while the peak power of the

$\mu $

s pulse decreases from 143.2 W to 87.5W, corresponding to intensities of up to GW/cm² and MW/cm², respectively. The micro-pulse programmable Q-switched regime is well useful to extend the potential applications of the combined pulse laser, particularly in laser beam drilling.

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结合纳秒和微秒脉冲输出的紧凑型q开关振荡器

我们开发了一种激光二极管侧泵浦调q Nd:YAG激光器，能够产生由峰值功率纳秒（ns）和微秒（$\mu $ s）脉冲组成的组合脉冲。在自由运行模式下，在1 kHz重复频率下，脉冲持续时间为$115~ $115 μ $ s，最大输出功率为22.1 W。通过仔细调整q开关触发延迟和q开关打开时间，产生了由单个ns脉冲和$\ μ $ s脉冲序列组成的组合宏脉冲，其中ns脉冲功率相对于总组合脉冲功率的比例可以从45%调节到接近100%。ns脉冲的峰值功率从83 kW增加到396.4 kW，而$\mu $ s脉冲的峰值功率从143.2 W减少到87.5W，强度分别高达GW/cm2和MW/cm2。微脉冲可编程调q机制有助于扩展组合脉冲激光器的潜在应用，特别是在激光束钻孔方面。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.