Study on the signal-to-noise ratio of Brillouin optical-time domain analyzers

Optics Express
Sheng WangLuc Thévenaz

Abstract

The signal-to-noise ratio (SNR) of Brillouin optical time-domain analyzers (BOTDA) is modelled and experimentally validated, using direct detection with and without the use of optical pre-amplification. The behavior of SNR as a function of the Brillouin gain and the probe power reaching the photo detection is analyzed in depth using this developed model and checked using two photodetectors with different specifications. It proves that a pre-amplification associated to a good-quality photodetector and a well-matched post-processing filtering can secure the highest SNR for direct-detection BOTDA. Such an optimal SNR presents only a 2.3 dB penalty compared to the ideal shot-noise-limited case that can only be reached using rather sophisticated configurations. In addition, the model here established predicts the SNR at any fiber position in any given experimental condition.

References

Jan 19, 2010·Optics Letters·Marcelo A SotoLuc Thévenaz
Jan 26, 2011·Optics Letters·Marcelo A SotoFabrizio Di Pasquale
Feb 12, 2014·Optics Express·Marcelo A Soto, Luc Thévenaz
Jul 15, 2016·Optics Express·Alejandro Dominguez-LopezMiguel Gonzalez-Herraez
Aug 19, 2018·Optics Express·Zhisheng YangMarcelo A Soto
Jan 31, 2019·Optics Express·Ruolin LiaoPerry Ping Shum

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cell Imaging in CNS

Here is the latest research on cell imaging and imaging modalities, including light-sheet microscopy, in the central nervous system.