Improving the efficiency of optical coherence tomography by using the non-ideal behaviour of a polarising beam splitter

Norman Lippok, Poul Nielsen, Frédérique Vanholsbeeck

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We present a new way of improving the efficiency of optical coherence tomography by using the polarisation crosstalk of a polarizing beam splitter to direct most of the available source optical power to the sample. The use of a quarter wave plate in both the reference and the sample arms allows most of the sample power to be directed to the detector while adjusting the reference arm to ensure noise optimised operation. As a result, the sensitivity of such a system can be improved by 6 dB, or alternatively the acquisition time can be improved by a factor of 4 for shot noise limited performance,compared to a traditional OCT configuration using a 50/50 beam splitter. © 2011 Optical Society of America.
Original languageEnglish (US)
Pages (from-to)7161
JournalOptics Express
Volume19
Issue number8
DOIs
StatePublished - Mar 30 2011
Externally publishedYes

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