scholarly journals Tailorable Brillouin Light Scattering in a Lithium Niobate Waveguide

2021 ◽  
Vol 11 (18) ◽  
pp. 8390
Author(s):  
Wuyue Wang ◽  
Yu Yu ◽  
Yunfei Li ◽  
Zhenxu Bai ◽  
Gong Wang ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Phonon Frequency ◽  
Brillouin Scattering ◽  
Tunable Laser ◽  
Stimulated Brillouin Scattering ◽  
Hybrid Structure ◽  
Low Noise ◽  
Silicon Waveguides ◽  
New Type ◽  
Stimulated Brillouin

Stimulated Brillouin scattering (SBS) lasers based on silicon waveguides with large SBS gain have been widely used in frequency tunable laser emissions, mode-locked pulse lasers, low-noise oscillators, optical gyroscopes and other fields. However, among SBS lasers, the realization of Brillouin laser output often requires a longer waveguide length, which not only increases waveguide loss but also increase the size of the device. As a new medium, lithium niobate has been fabricated into a new type of hybrid structure. Meanwhile, the width of a suspended waveguide is adjusted to tune the phonon frequency of an SBS laser based on lithium niobate substrate. Simulation results show that the tunable forward SBS effect is realized in a lithium niobate-suspended optical waveguide, showing a larger forward stimulated Brillouin scattering gain of 0.31 W−1m−1. The tunable phonon frequency ranges from 1 to 15 GHz. Therefore, utilizing the photon–phonon conversion effect, the waveguide system with LiNbO3 will pave a new way forward with better integration.

scholarly journals Tailorable Stimulated Brillouin Scattering Laser Based on Silicon Ring Waveguides

2021 ◽  
Vol 9 ◽  
Author(s):  
Yulei Wang ◽  
Kai Li ◽  
Yu Yu ◽  
Sensen Li ◽  
Yunfei Li ◽  
...  
Keyword(s):  
Optical Waveguide ◽  
Moving Boundary ◽  
Acoustic Radiation ◽  
Brillouin Scattering ◽  
Ring Cavity ◽  
Tunable Laser ◽  
Stimulated Brillouin Scattering ◽  
Low Noise ◽  
Stimulated Brillouin ◽  
Silicon Based

Stimulated Brillouin scattering (SBS) lasers based on silicon waveguides with large SBS gain, have been widely used in frequency tunable laser emission, mode-locked pulse laser, low-noise oscillator, optical gyroscope, and other fields. However, current SBS lasers still need long waveguide lengths to realize Brillouin laser output, which increases the waveguide losses and is not conductive to be integrated. In this paper, we propose a silicon ring waveguide, in order to tune the frequency of the phonon field of SBS laser based on the silicon substrate of the ring cavity. The simulation results exhibit that the tailorable forward SBS effect is realized in the silicon-based optical waveguide with a large SBS gain up to 1.90 W-1m-1. Particularly, with the mutual restraint between photoelastic and moving boundary effects, the tunable phonon frequencies emitting from 1 to 15 GHz are realized through the conversion among higher order modes by modifying the widths of the ring cavity. Therefore, this silicon waveguide based on ring cavity will provide a new technical scheme for designing tunable SBS lasers by tuning the ring widths. In addition, this enhanced and broadband acoustic radiation will pave the way for hybrid integration in silicon-based optical waveguide, micro-electromechanical system, and CMOS signal processing technology.

scholarly journals Mode conversion using stimulated Brillouin scattering in nanophotonic silicon waveguides

2014 ◽  
Vol 22 (23) ◽  
pp. 29270 ◽  
Author(s):  
Iman Aryanfar ◽  
Christian Wolff ◽  
M. J. Steel ◽  
Benjamin J. Eggleton ◽  
Christopher G. Poulton
Keyword(s):  
Mode Conversion ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Silicon Waveguides ◽  
Stimulated Brillouin

scholarly journals Tailorable stimulated Brillouin scattering in nanoscale silicon waveguides

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Heedeuk Shin ◽  
Wenjun Qiu ◽  
Robert Jarecki ◽  
Jonathan A. Cox ◽  
Roy H. Olsson ◽  
...  
Keyword(s):  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Silicon Waveguides ◽  
Stimulated Brillouin
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