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Proceedings Paper

Spectral domain optical coherence tomography using a microchip laser-pumped photonic crystal fiber supercontinuum source
Author(s): Qi Zhao; Takashi Buma
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Paper Abstract

We report spectral domain optical coherence tomography (SDOCT) with a supercontinuum source based on a photonic crystal fiber pumped with nanosecond laser pulses. The Q-switched Nd:YAG microchip laser produces 0.6 ns duration pulses at 1064 nm with 8 μJ of energy at a 6.6 kHz repetition rate. These pulses are sent through 3 m of photonic crystal fiber with a zero dispersion wavelength of 1040 nm. The fiber output is coupled into a fiber-based SDOCT system operating at a central wavelength of 800 nm. The A-line acquisition rate is 6.6 kHz, where each A-line is produced by a single supercontinuum pulse. Point spread function measurements show excellent resolution, but sensitivity is degraded by spectral fluctuations of individual supercontinuum pulses. Test images show less dynamic range compared to a Ti:Sapphire femtosecond laser based system. However, this supercontinuum source has potential for stroboscopic illumination in time-resolved low coherence interferometry.

Paper Details

Date Published: 18 February 2008
PDF: 8 pages
Proc. SPIE 6847, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII, 68472M (18 February 2008); doi: 10.1117/12.763914
Show Author Affiliations
Qi Zhao, Univ. of Delaware (United States)
Takashi Buma, Univ. of Delaware (United States)

Published in SPIE Proceedings Vol. 6847:
Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII
Joseph A. Izatt; James G. Fujimoto; Valery V. Tuchin, Editor(s)

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