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Linewidth enhancement factor in a microcavity Brillouin laser

Yuan, Zhiquan and Wang, Heming and Wu, Lue and Gao, Maodong and Vahala, Kerry (2020) Linewidth enhancement factor in a microcavity Brillouin laser. Optica, 7 (9). pp. 1150-1153. ISSN 2334-2536.

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The linewidth of regenerative oscillators is enhanced by amplitude–phase coupling of the oscillator field [Phys. Rev. 160, 290 (1967)]. In laser oscillators, this effect is well known for its impact on semiconductor laser performance. Here, this coupling is studied in Brillouin lasers. Because their gain is parametric, the coupling and linewidth enhancement are shown to originate from phase mismatch. The theory is confirmed by measurement of linewidth in a microcavity Brillouin laser, and enhancements as large as 50× are measured. The results show that pump wavelength and device temperature should be carefully selected and controlled to minimize linewidth. More generally, this work provides a new perspective on the linewidth enhancement effect.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Wang, Heming0000-0003-3861-0624
Wu, Lue0000-0002-7503-7057
Vahala, Kerry0000-0003-1783-1380
Additional Information:© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Received 2 April 2020; revised 27 July 2020; accepted 28 July 2020 (Doc. ID 394311); published 4 September 2020. The authors thank Y. Lai, Q. Yang, and C. Bao for helpful discussions. Funding. Air Force Office of Scientific Research (FA9550-18-1-0353); Caltech Kavli Nanoscience Institute. The authors declare no conflicts of interest. See Supplement 1 for supporting content.
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-18-1-0353
Kavli Nanoscience InstituteUNSPECIFIED
Issue or Number:9
Record Number:CaltechAUTHORS:20201022-112713346
Persistent URL:
Official Citation:Zhiquan Yuan, Heming Wang, Lue Wu, Maodong Gao, and Kerry Vahala, "Linewidth enhancement factor in a microcavity Brillouin laser," Optica 7, 1150-1153 (2020)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106228
Deposited By: George Porter
Deposited On:22 Oct 2020 20:41
Last Modified:22 Oct 2020 20:41

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