Fundamentals of Direct Multi-Wavelength Diode Pumping of Ti:Sapphire Lasers for Enhanced Optical-to-Optical Conversion Efficiency Across a Broad Spectral Range

IF 1.3 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2025-05-26 DOI:10.1134/S0021364025606773

K. E. Reznikov, A. O. Mavritskiy, M. N. Esaulkov, A. V. Naumov, A. V. Konyashchenko

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Abstract

Direct-diode-pumped titanium–sapphire lasers are gaining popularity as sources of coherent light due to their wide emission bandwidth, cost-effectiveness, ergonomics and compactness. Despite recent advances in this field, reported laser output powers remain relatively low. Here, we present a theoretically and experimentally described pumping technique that involves the spectral and collinear combination of blue and green laser diode radiation. We show that this approach yields an impressive average optical-to-optical efficiency of 16.6% in continuous-wave laser mode and up to 43.6% in femtosecond mode based on Kerr-lens mode-locking. Consequently, with a maximum pump power of 15 W, the generated output power at 770 nm reaches 2.5 W in continuous-wave mode. With a pump of 14.5 W we have 1.84 W in femtosecond mode. In the future, such titanium–sapphire lasers promise to become even more accessible and user-friendly.

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直接多波长二极管泵浦Ti的基本原理：蓝宝石激光器在宽光谱范围内增强光对光转换效率

直接二极管泵浦钛蓝宝石激光器由于其宽发射带宽、成本效益、人体工程学和紧凑性而越来越受欢迎。尽管最近在这一领域取得了进展，但报道的激光输出功率仍然相对较低。在这里，我们提出了一种理论和实验描述的泵浦技术，涉及蓝绿激光二极管辐射的光谱和共线组合。我们表明，这种方法在连续波激光模式下产生了令人印象深刻的平均光对光效率16.6%，在基于克尔透镜模式锁定的飞秒模式下高达43.6%。因此，在最大泵浦功率为15w的情况下，在770 nm处产生的输出功率在连续波模式下达到2.5 W。14.5 W的泵在飞秒模式下有1.84 W。在未来，这种钛蓝宝石激光器有望变得更加易于使用和用户友好。

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

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.