Maintaining maximum signal-to-noise ratio in uncooled vertical-cavity surface-emitting laser-based self-mixing sensors

Ranveer S. Matharu, Julien Perchoux, Russell Kliese, Yah Leng Lim, Aleksandar D. Rakić

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We demonstrate a method for maintaining the maximum signal-to-noise ratio (SNR) of the signal obtained from the self-mixing sensor based on a vertical-cavity surface-emitting laser (VCSEL). It was found that the locus of the maximum SNR in the current-temperature space can be well approximated by a simple analytical model related to the temperature behavior of the VCSEL threshold current. The optimum sensor performance is achieved by tuning the laser current according to the proposed model, thus enabling the sensor to operate without temperature stabilization in a wide temperature range between ?20 °C and +80 °C.

Original languageEnglish
Pages (from-to)3690-3692
Number of pages3
JournalOptics Letters
Volume36
Issue number18
DOIs
Publication statusPublished - 15 Sep 2011
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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