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Integrated electro-optically tunable narrow-linewidth III-V laser

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posted on 2023-11-29, 17:01 authored by Yiran Zhu, Shupeng Yu, Zhiwei Fang, Difeng Yin, Jian Liu, Zhe Wang, Yuan Zhou, Yu Ma, Haisu Zhang, Min Wang, Ya Cheng
We demonstrate an integrated electro-optically tunable narrow-linewidth III-V laser with an output power of 738.8 {\mu}W and an intrinsic linewidth of 45.55 kHz at the C band. The laser cavity is constructed using a fiber Bragg grating (FBG) and a tunable Sagnac loop reflector (TSLR) fabricated on thin film lithium niobate (TFLN). The combination of the FBG and the electro-optically tunable TSLR offers the advantages of single spatial mode, single-frequency, narrow-linewidth, and wide wavelength tunability for the electrically pumped hybrid integrated laser, which features a frequency tuning range of 20 GHz and a tuning efficiency of 0.8 GHz/V.

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