Compact mid-infrared dual-wavelength optical parametric oscillator pumped by Yb-doped fiber lasers based on two PPMgLN crystals

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2024-09-19 DOI:10.1016/j.optcom.2024.131130

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引用次数: 0

Abstract

A compact mid-infrared (MIR) dual-wavelength optical parametric oscillator (OPO) pumped by Yb-doped fiber lasers (YDFLs) based on dual-crystal with an L-shaped cavity structure is demonstrated. Two periodically poled MgO-doped lithium niobite (PPMgLN) crystals with polarization periods of 30.44 μm and 28.96 μm are pumped by two YDFLs, respectively. The dual-wavelength output at 3.45 μm and 4.00 μm is obtained synchronously by adjusting the double pump power. When the total power of double-end pumping is 28.98 W with a ratio of 2:3, the pulse width is 60.80 ns under the repetition frequency of 110 kHz, the output power is 1.483 [email protected] μm and 1.703 [email protected] μm, respectively. The total conversion efficiency is 10.99%. By utilizing this cavity structure, the gain and wavelength tuning of the two OPOs can be controlled separately. Meanwhile, the pulse width is 46.93 [email protected] μm and 39.38 [email protected] μm, respectively. The laser beam quality closely approaches the theoretical quality of the fundamental mode beam. Additionally, by independently adjusting the temperature of the two PPMgLN crystals from 20 °C to 150 °C, tunable mid-infrared laser outputs with wavelengths of 3.448–3.272 μm and 4.006–3.864 μm are achieved. The corresponding tuning bandwidths are 176 nm and 142 nm, respectively.

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基于两块 PPMgLN 晶体、由掺镱光纤激光器泵浦的紧凑型中红外双波长光参量振荡器

本文展示了一种由掺镱光纤激光器（YDFL）泵浦的紧凑型中红外（MIR）双波长光参量振荡器（OPO），该振荡器基于具有 L 形腔结构的双晶体。两个偏振周期分别为 30.44 μm 和 28.96 μm 的周期性极化氧化镁掺杂铌酸锂（PPMgLN）晶体由两个 YDFL 泵浦。通过调节双泵浦功率，可同步获得 3.45 μm 和 4.00 μm 的双波长输出。当双端泵浦的总功率为 28.98 W，比例为 2:3，脉冲宽度为 60.80 ns，重复频率为 110 kHz 时，输出功率分别为 1.483 [email protected] μm 和 1.703 [email protected] μm。总转换效率为 10.99%。利用这种腔体结构，可以分别控制两个 OPO 的增益和波长调节。同时，脉冲宽度分别为 46.93 [email protected] μm 和 39.38 [email protected] μm。激光光束质量接近基模光束的理论质量。此外，通过将两个 PPMgLN 晶体的温度从 20 °C 单独调节到 150 °C，实现了波长为 3.448-3.272 μm 和 4.006-3.864 μm 的可调谐中红外激光输出。相应的调谐带宽分别为 176 纳米和 142 纳米。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.