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Proceedings Paper

Programmable high speed (~1MHz) Vernier-mode-locked frequency-swept laser for OCT imaging
Author(s): M. Kourogi; Y. Kawamura; Y. Yasuno; H. Oyaizu; H. Miyao; K. Imai
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Paper Abstract

We propose and demonstrate a programmable high-speed, frequency-swept laser for swept-source optical coherence tomography (SS-OCT). This new technique is based on Vernier effect of two pieces of Fabry-Perot electro-optic modulators. This technique offers a non-mechanical optical filter with high resolution and wide tuning range. By applying it to a Fourier domain mode-locked laser, such sweeps are generated. The Vernier effect filter can be modulated by arbitrary wave forms, thus this laser source can eliminate the rescaling process which is the main bottle-neck of the operation time in SS-OCT by applying frequency sweep to equidistant spacing in frequency. Effective repetition frequencies of 100kHz~1MHz are demonstrated with a tuning range of 17THz (140nm) at 1550nm center wavelength. OCT imaging of in vivo human sweat duct with A-line rate of 100kHz and 300kHz are also demonstrated. The resolution of 12μm~ is realized without rescaling process. We present an analysis which suggests design approaches for optimization performance.

Paper Details

Date Published: 18 February 2008
PDF: 8 pages
Proc. SPIE 6847, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII, 68470Z (18 February 2008); doi: 10.1117/12.765364
Show Author Affiliations
M. Kourogi, Optical Comb, Inc. (Japan)
Y. Kawamura, Optical Comb, Inc. (Japan)
Y. Yasuno, Univ. of Tsukuba (Japan)
H. Oyaizu, Optical Comb, Inc. (Japan)
H. Miyao, Optical Comb, Inc. (Japan)
K. Imai, Optical Comb, Inc. (Japan)

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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