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Proceedings Paper

Instantaneous coherence length measurement of a swept laser source using a Mach-Zehnder interferometer
Author(s): Tim von Niederhäusern; Christoph Meier; Marcus Duelk; Philipp Vorreau
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Paper Abstract

We present a measurement method which is capable of measuring the instantaneous coherence length as a function of the wavelength while the source is working at its full sweep rate. The measurement principle is based on the dynamic decrease of fringe contrast as a function of the optical path difference. The measurement setup consists of a free-space Mach-Zehnder interferometer with a variable optical path difference. We present results for instantaneous coherence lengths in a range from 0 mm to 50 mm with a mean standard deviation of 0.42 mm at sweep rates of up to 120 kHz.

Paper Details

Date Published: 11 February 2011
PDF: 7 pages
Proc. SPIE 7889, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV, 78892R (11 February 2011); doi: 10.1117/12.873769
Show Author Affiliations
Tim von Niederhäusern, Bern Univ. of Applied Sciences (Switzerland)
Christoph Meier, Bern Univ. of Applied Sciences (Switzerland)
Marcus Duelk, Exalos AG (Switzerland)
Philipp Vorreau, Exalos AG (Switzerland)


Published in SPIE Proceedings Vol. 7889:
Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV
James G. Fujimoto; Joseph A. Izatt; Valery V. Tuchin, Editor(s)

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