New optical instruments for coherence tomography

Youxin Mao; Shoude Chang; Costel Flueraru

doi:10.1117/12.839588

24 November 2009 New optical instruments for coherence tomography

Youxin Mao, Shoude Chang, Costel Flueraru

Proceedings Volume 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration; 750908 (2009) https://doi.org/10.1117/12.839588
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

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.

Citation Download Citation

Youxin Mao, Shoude Chang, and Costel Flueraru "New optical instruments for coherence tomography", Proc. SPIE 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration, 750908 (24 November 2009); https://doi.org/10.1117/12.839588

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KEYWORDS

Optical coherence tomography

GRIN lenses

Optical filters

Tissue optics

Single mode fibers

In vivo imaging

Lenses

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