Comparison of different focusing systems for common-path optical coherence tomography with fiber-optic bundle as endoscopic probe

Weichao Wang; Kang Zhang; Qiushi Ren; Jin Ung Kang

doi:10.1117/1.3250270

1 October 2009 Comparison of different focusing systems for common-path optical coherence tomography with fiber-optic bundle as endoscopic probe

Weichao Wang, Kang Zhang, Qiushi Ren, Jin Ung Kang

Author Affiliations +

Optical Engineering, Vol. 48, Issue 10, 103001 (October 2009). https://doi.org/10.1117/1.3250270

Abstract

A fiber-optic bundle-based submillimeter probe for endoscopic common-path optical coherence tomography with focusing system is presented. Three different focusing systems, bulk lenses, a gradient index (GRIN) lens, and a microlens array, are proposed and compared. The simulation results show that all the focusing systems can focus the beam with different degrees of effectiveness. The major differences between the different focusing systems exist in the beam size and the divergence angle between the inner and outer pixels of the fiber bundle. The microlens array shows the smallest change in beam size from the central fiber to the outermost fiber, while the GRIN lens exhibits the largest. Signal-to-noise ratio of the system, taking attenuation and cross talk between adjacent pixels of the fiber bundle into account, is also analyzed.

©(2009) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Weichao Wang, Kang Zhang, Qiushi Ren, and Jin Ung Kang "Comparison of different focusing systems for common-path optical coherence tomography with fiber-optic bundle as endoscopic probe," Optical Engineering 48(10), 103001 (1 October 2009). https://doi.org/10.1117/1.3250270

Published: 1 October 2009

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