Multiple receivers in a high-resolution near-infrared heterodyne spectrometer

Joe Kurtz*, Sean O'Byrne

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The paper describes a modification of a high-resolution heterodyne NIR spectrometer described by Rodin, et al. in Opt. Express 22, 13825 (2014), wherein the noise amplitude of the heterodyne signal squared was proportional to the power of the incoherent radiation source (the sun). The addition of a second receiver collecting radiation from the sun into a second single-mode fiber created up to a factor of two increase in detected source power spectrum. The ability to add uncorrelated heterodyne IF signals as Gaussian noise (variance) provides the means by which multiple heterodyne receivers of signal from an incoherent source can increase the detected source power by the same multiple, thus avoiding the limit imposed by the antenna theorem for a single receiver (A. E. Siegman, Appl. Opt. 5, 1588 (1966)).

Original languageEnglish
Pages (from-to)23838-23848
Number of pages11
JournalOptics Express
Volume24
Issue number21
DOIs
Publication statusPublished - 17 Oct 2016
Externally publishedYes

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