High Power Laser Science and Engineering, Volume. 11, Issue 4, 04000e47(2023)
Linewidth narrowing in free-space-running diamond Brillouin lasers
Fig. 1. Illustration of the phase match, experimental setup and linewidth measurement system of a free-space, free-running BL based on a diamond. (a) Demonstration of the Brillouin gain process. The grey curve refers to the cavity resonant mode with full width at half maximum (FWHM) γ. The red (blue) curves refer to pump (Stokes) frequency
Fig. 2. (a) PSD at different fiber lengths for a linewidth of 1 kHz. (b) PSD spectrum at different laser linewidth values for a fiber length of 1 km.
Fig. 3. (a) Amplitude of the envelope differences and the frequency shift of the first extreme value point (
Fig. 4. Stokes linewidth corresponding to the reflectivity of the three sets of coupling mirrors at 60 W power pumping. (a) Power spectrum of the corresponding delayed self-heterodyne amplitude difference. (b) Linewidth and envelope amplitude difference curves calculated by the coherent envelope method.
Fig. 5. Stokes power with different coupling mirror reflectivities.
Fig. 6. (a) Stokes output linewidth determined by passive loss and coupling mirror reflectivity. (b) Stokes output power determined by passive loss and coupling mirror reflectivity at a fixed pump power of 60 W.
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Duo Jin, Zhenxu Bai, Zhongan Zhao, Yifu Chen, Wenqiang Fan, Yulei Wang, Richard P. Mildren, Zhiwei Lü. Linewidth narrowing in free-space-running diamond Brillouin lasers[J]. High Power Laser Science and Engineering, 2023, 11(4): 04000e47
Category: Research Articles
Received: Mar. 28, 2023
Accepted: May. 30, 2023
Published Online: Jul. 7, 2023
The Author Email: Zhenxu Bai (baizhenxu@hotmail.com), Yulei Wang (wyl@hebut.edu.cn), Zhiwei Lü (zhiweilv@hebut.edu.cn)