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4 March 2019 Investigating Brillouin scattering in a few-mode fiber (Conference Presentation)
Yuan Mao, Islam Ashry, Tien Khee Ng, Boon S. Ooi
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Proceedings Volume 10902, Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII; 109021H (2019) https://doi.org/10.1117/12.2509587
Event: SPIE LASE, 2019, San Francisco, California, United States
Abstract
Stimulated Brillouin scattering (SBS) based distributed optical fiber sensors have been deployed in a myriad of potential applications. Recently, the characteristics of SBS in few-mode-fibers (FMFs) have been investigated for designing optical sensors of high selectivity. For example, monitoring SBS of the individual modes in a two-mode fiber (TMF) allows simultaneous sensing of temperature and strain. In optical communications, on contrary, SBS degrades the signal-to-noise ratio (SNR) and limits the channel capacity. We here experimentally measure the threshold power required to stimulate Brillouin scattering in an FMF when using different mode-pair combinations as pump and probe signals. In particular, we use mode-division-multiplexing (MDM) to launch different linearly-polarized (LP) modes into the both ends of a TMF. For each mode-pair, we gradually raise the pump power until observing the transition from spontaneous to stimulated Brillouin scattering. The results presented here are considerably important for designing efficient FMF-based optical communications/sensing system.
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Yuan Mao, Islam Ashry, Tien Khee Ng, and Boon S. Ooi "Investigating Brillouin scattering in a few-mode fiber (Conference Presentation)", Proc. SPIE 10902, Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII, 109021H (4 March 2019); https://doi.org/10.1117/12.2509587
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KEYWORDS
Scattering
Optical communications
Signal to noise ratio
Telecommunications
Fiber optics sensors
Optical design
Optical sensors
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