Broadband low-repetition-rate mode-locked fiber laser for swept source optical coherence tomography

Laiyang Dang; Wenhao Zhu; Dongmei Huang; Feng Li

doi:10.1117/12.3048722

5 December 2024 Broadband low-repetition-rate mode-locked fiber laser for swept source optical coherence tomography

Laiyang Dang, Wenhao Zhu, Dongmei Huang, Feng Li

Author Affiliations +

Proceedings Volume 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024); 134183F (2024) https://doi.org/10.1117/12.3048722
Event: 15th International Conference on Information Optics and Photonics (CIOP2024), 2024, Xi’an, China

Abstract

We proposed and demonstrated an all-fiber Nonlinear Polarization rotation (NPR) erbium-doped mode-locked laser, which reduces the laser repetition rate to 5.7 MHz based on a Large Mode Area Fiber (LAMF). In addition, the laser 3 dB bandwidth is extended to 86.4 nm by using extra cavity supercontinuum broadening. To the best of our knowledge, this is the first time to obtain a broadband output using such a low repetition rate mode-locked laser. This broadband low repetition rate mode-locked laser signal is then applied to time-stretched Optical Coherence Tomography (OCT). The swept source can achieve an imaging range of more than 85 mm and a sensitivity roll-off of 3.5 dB in OCT. The all-fiber low repetition rate broadband swept source based on time-stretching technology has a compact structure and high stability, and is very promising in the field of frequency measurement and high-resolution OCT.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Laiyang Dang, Wenhao Zhu, Dongmei Huang, and Feng Li "Broadband low-repetition-rate mode-locked fiber laser for swept source optical coherence tomography", Proc. SPIE 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024), 134183F (5 December 2024); https://doi.org/10.1117/12.3048722

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KEYWORDS

Mode locking

Optical coherence tomography

Fiber lasers

Imaging systems

Pulsed laser operation

Biological imaging

Image resolution

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