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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 9, Iss. 5 — Apr. 29, 2014

High-energy pulsed Raman fiber laser for biological tissue coagulation

Hyoung Won Baac, Néstor Uribe-Patarroyo, and Brett E. Bouma  »View Author Affiliations

Optics Express, Vol. 22, Issue 6, pp. 7113-7123 (2014)

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We demonstrate a high-energy pulsed Raman fiber laser (RFL) with an emission wavelength of 1.44 μm, corresponding to an absorption peak of water. Microsecond pulses with >20 mJ/pulse and >40 W peak power were generated, well above the threshold for tissue coagulation and ablation. Here, we focus on the optical characterization and optimization of high-energy and high-power RFLs excited by an ytterbium fiber laser, comparing three configurations that use different Raman gain fibers, but all of which were prepared with a one-side opened, free-run mode without output mirrors. We show that the free-run configuration can generate sufficiently high energy without requiring a closed cavity design. Experimental RFL characteristics corresponded well with numerical simulations. We discuss the Stokes beam generation process in our system and loss mechanisms mainly associated with fiber Bragg gratings.

© 2014 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3550) Lasers and laser optics : Lasers, Raman
(170.3890) Medical optics and biotechnology : Medical optics instrumentation

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: December 18, 2013
Revised Manuscript: February 1, 2014
Manuscript Accepted: February 5, 2014
Published: March 19, 2014

Virtual Issues
Vol. 9, Iss. 5 Virtual Journal for Biomedical Optics

Hyoung Won Baac, Néstor Uribe-Patarroyo, and Brett E. Bouma, "High-energy pulsed Raman fiber laser for biological tissue coagulation," Opt. Express 22, 7113-7123 (2014)

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