期刊
OPTICS LETTERS
卷 46, 期 10, 页码 2320-2323出版社
Optica Publishing Group
DOI: 10.1364/OL.424496
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资金
- National Natural Science Foundation of China [61635004, 61905028, 61933004]
- China Postdoctoral Science Foundation [2018M643406]
- Chongqing Postdoctoral Program for Innovative Talents [CQBX201902]
- Fundamental Research Funds for the Central Universities [2019CDCGGD323, 2020CDCGJ036]
- Innovative Research Groups of Chongqing [cstc2020jcyj-cxttX0005]
- National Science Fund for Distinguished Young Scholars [61825501]
A narrow linewidth vertical-cavity surface-emitting laser (VCSEL) with stable frequency was achieved by injecting resonant optical feedback into the lasing cavity, providing a high-performance light source for single VCSEL or VCSM array-based applications. The on-chip microring add-drop filter played a key role in achieving a Lorentzian linewidth of 32.6 kHz and a purified optical spectrum. The frequency noise spectrum of the VCSEL showed that the thermo-optic effect in the microring resonator helped stabilize the lasing frequency.
We demonstrate a narrow linewidth vertical-cavity surface-emitting laser (VCSEL) by injecting resonant optical feedback into the lasing cavity. A single longitudinal mode VCSEL with a Lorentzian linewidth of 32.6 kHz and a purified optical spectrum is experimentally achieved by an on-chip microring add-drop filter with a quality factor of 1.36 million, where the feedback level is -47.77 dB. The frequency noise spectrum of the VCSEL demonstrates that the thermo-optic effect in the microring resonator can also stabilize the lasing frequency. A VCSEL with narrow linewidth and stable frequency provides a high-performance light source for a single VCSEL or VCSM array-based application. (C) 2021 Optical Society of America
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