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Proceedings Paper

High-speed wide tuning range wavelength swept laser around 1310 nm for frequency domain OCT
Author(s): Minghui Chen; Zhihua Ding; Tong Wu; Lei Xu
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Paper Abstract

Optical coherence tomography (OCT) is an emerging cross-sectional imaging technology. It uses broadband light sources to achieve axial image resolutions on a few microns scale. In this paper, the principle of Fourier domain mode-locked (FDML) wavelength swept laser for swept source optical coherence tomography (SS-OCT) is presented and crucial parameters of the laser system are discussed. On analysis of different methods and system configurations, a new configuration of swept laser system is put forward. We theoretically demonstrate a high-speed, broad bandwidth, Fourier domain mode-locked (FDML) wavelength swept laser around 1310 nm for high-resolution frequency domain optical coherence tomography (FD-OCT). The laser has a fiber ring cavity with a semiconductor optical amplifier gain medium. Intra-cavity mode selection is achieved with an in-fiber tunable fiber Fabry-Perot filter. The laser is designed to generate 32 kHz sweeping rate with a tuning range of 165 nm full width, 3 dB sweep range of 91 nm. In SS-OCT applications the swept laser will achieve about 8.3 μm axial resolution in air and 5.9 μm axial resolution in biological tissue. The instantaneous linewidth is 0.103 nm corresponding to a coherence length of several mm, enabling OCT imaging over a large axial range. The swept laser implemented in the FD-OCT system can provide information of biological tissue imaging in real time.

Paper Details

Date Published: 6 March 2009
PDF: 8 pages
Proc. SPIE 7280, Seventh International Conference on Photonics and Imaging in Biology and Medicine, 72800A (6 March 2009); doi: 10.1117/12.821464
Show Author Affiliations
Minghui Chen, Zhejiang Univ. (China)
Zhihua Ding, Zhejiang Univ. (China)
Tong Wu, Zhejiang Univ. (China)
Lei Xu, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 7280:
Seventh International Conference on Photonics and Imaging in Biology and Medicine
Qingming Luo; Lihong V. Wang; Valery V. Tuchin, Editor(s)

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