Stretched-pulse mode-locked wavelength-swept laser with various lengths of CFBG for ultrahigh-speed optical coherence tomography

Seungwan Cho; Wang-Yuhl Oh; JongYoon Joo

doi:10.1117/12.3001225

13 March 2024 Stretched-pulse mode-locked wavelength-swept laser with various lengths of CFBG for ultrahigh-speed optical coherence tomography

Seungwan Cho, Wang-Yuhl Oh, JongYoon Joo

Author Affiliations +

Proceedings Volume PC12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII; PC128300I (2024) https://doi.org/10.1117/12.3001225
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Imaging speed of OCT is a crucial factor for various applications. In swept source OCT, the imaging speed is directly determined by the sweep repetition speed of the wavelength-swept laser. Recently, a stretched-pulse mode-locked (SPML) wavelength-swept laser has been developed, utilizing chromatic dispersion to generate the wavelength-swept output with repetition rates from a few MHz to over 10 MHz without using any mechanical filter. In this work, we investigated SPML lasers with various repetition rates of 10 MHz, 20 MHz, and 80 MHz utilizing 10 m (930 ps/nm), 5 m (465 ps/nm), and 1 m (93 ps/nm) long CFBGs, respectively. We present coherence length and relative intensity noise (RIN) performances of the SPML lasers with various speeds and show the comparison of images acquired using the SPML lasers of 10 MHz and 80 MHz repetition rates.

Conference Presentation

Citation Download Citation

Seungwan Cho, Wang-Yuhl Oh, and JongYoon Joo "Stretched-pulse mode-locked wavelength-swept laser with various lengths of CFBG for ultrahigh-speed optical coherence tomography", Proc. SPIE PC12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII, PC128300I (13 March 2024); https://doi.org/10.1117/12.3001225

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