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Proceedings Paper

New optical instruments for coherence tomography
Author(s): Youxin Mao; Shoude Chang; Costel Flueraru
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Paper Abstract

We present the following novel technologies for optical coherence tomography developed in Institute for Microstructural Sciences, National Research Council Canada. We first demonstrate a high power mode-lock wavelength swept laser using a polygon-based narrowband optical scanning filter first. Peak and average output powers of 98 mW and 71 mW have been achieved, respectively, without an external amplifier, while the wavelength was swept continuously from 1247 nm to 1360 nm. Then, we present a design, construction and characterization of ultra-small OCT probes using fiber lenses. Those fiber lens modules are made of a single mode fiber and a GRIN or ball fiber lens with or without a fiber spacer between them. The lens diameters are smaller than 0.3 mm. We discuss theoretical models, design methods, fabrication techniques, and measured performance compared with modeling results. Finally, we demonstrate an instantaneous complex conjugate resolved swept-source OCT using a 3x3 Mach-Zehnder interferometer. The interferometer provides simultaneous access to complementary phase components of the complex interferometric signals; therefore, the effective imaging depth was doubled. The complex conjugate artifact suppression of 27 dB was obtained. OCT Images of human nail and animal tissue are presented.

Paper Details

Date Published: 24 November 2009
PDF: 8 pages
Proc. SPIE 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration, 750908 (24 November 2009); doi: 10.1117/12.839588
Show Author Affiliations
Youxin Mao, National Research Council Canada (Canada)
Shoude Chang, National Research Council Canada (Canada)
Costel Flueraru, National Research Council Canada (Canada)

Published in SPIE Proceedings Vol. 7509:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration
Xuping Zhang; Wojtek J. Bock; Xuejun Lu; Hai Ming, Editor(s)

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