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

Norman Lippok, Poul Nielsen, Frédérique Vanholsbeeck
2011 Optics Express  
We present a new way of improving the efficiency of optical coherence tomography by using the polarisation crosstalk ofap o l a r i s i n g 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
more » ... be improved by 6 dB, or alternatively the acquisition time can be improved by a factor of 4 for shot noise limited performance. ©2 0 1 0O p t i c a lS o c i e t yo fA m e r i c a
doi:10.1364/oe.19.007161 pmid:21503030 fatcat:7rrclr6o65dghmfztox3grsbxe