Enhanced Diamond Brillouin Scattering Based on Cascaded Raman Conversion
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-06-26 |
| Authors | Hui Chen, Yulei Wang, Zhiwei LĆ¼, Richard P. Mildren, Zhenxu Bai |
| Institutions | Hebei University of Technology, Macquarie University |
Abstract
Section titled āAbstractāStimulated Brillouin scattering (SBS) is a wavelength-conversion effect favored by many researchers because of its low threshold, narrow linewidth and low noise intensity [1], [2]. In the past, low threshold and narrow linewidth Brillouin laser output has been obtained based on optical fiber, on-chip-waveguides and microcavities [3-5], but there are also problems such as low output power and difficult to control the cascade order. Comparatively, diamond crystal not only has a large Brillouin frequency shift (~70 GHz @1 Ī¼m) and gain coefficient (~80 cm/GW @0.5 Ī¼m) [7], [8], it has ultra-high thermal conductivity (>2000 Wm <sup xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā xmlns:xlink=āhttp://www.w3.org/1999/xlinkā>ā1</sup> K <sup xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā xmlns:xlink=āhttp://www.w3.org/1999/xlinkā>ā1</sup> ) and very wide spectral transmission band (>0.23 Ī¼m). These characteristics are important and give diamond the potential to break through the current bottlenecks limiting waveguide-based Brillouin lasers.