Constructive emission from terahertz quantum cascade laser array integrated with Talbot cavity

Yunfei Xu; Quanyong Lu; Weijiang Li; Yu Ma; Ning Zhuo; Junqi Liu; Jinchuan Zhang; Shenqiang Zhai; Shuman Liu; Lijun Wang; Fengqi Liu

doi:10.1117/12.2647978

15 March 2023 Constructive emission from terahertz quantum cascade laser array integrated with Talbot cavity

Yunfei Xu, Quanyong Lu, Weijiang Li, Yu Ma, Ning Zhuo, Junqi Liu, Jinchuan Zhang, Shenqiang Zhai, Shuman Liu, Lijun Wang, Fengqi Liu

Author Affiliations +

Proceedings Volume 12430, Quantum Sensing and Nano Electronics and Photonics XIX; 124301B (2023) https://doi.org/10.1117/12.2647978
Event: SPIE OPTO, 2023, San Francisco, California, United States

Conference Poster

Abstract

Integration of ridge array and Talbot cavity is an effective method for semiconductor laser optical power amplification. However, it is difficult for such designs to work stably in the fundamental supermode, resulting in the inability to achieve phase locking among the ridge arrays. Here, we report a phase-locked scheme that significantly increases the waveguide loss of high-order supermodes by adjusting the absorption boundary width of the ridge array, making the Talbot devices work stably in the fundamental supermode. Compared with the first-generation devices, the output power of the designed device is increased from 286 mW to 359 mW, and the central brightness is increased by twice. The demonstrated phase-locked high-brightness terahertz (THz) laser sources will have great application potential in THz spectroscopy and imaging.

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Yunfei Xu, Quanyong Lu, Weijiang Li, Yu Ma, Ning Zhuo, Junqi Liu, Jinchuan Zhang, Shenqiang Zhai, Shuman Liu, Lijun Wang, and Fengqi Liu "Constructive emission from terahertz quantum cascade laser array integrated with Talbot cavity", Proc. SPIE 12430, Quantum Sensing and Nano Electronics and Photonics XIX, 124301B (15 March 2023); https://doi.org/10.1117/12.2647978

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