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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 27 — Sep. 20, 2012
  • pp: 6465–6470

All-fiber passively mode-locked thulium/holmium laser with two center wavelengths

Rajesh Kadel and Brian R. Washburn  »View Author Affiliations


Applied Optics, Vol. 51, Issue 27, pp. 6465-6470 (2012)
http://dx.doi.org/10.1364/AO.51.006465


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Abstract

We have demonstrated a self-starting, passively mode-locked Tm/Ho codoped fiber laser that lases at one of two center wavelengths. An amplified 1.56 μm distributed feedback laser pumps a ring laser cavity which contains 1 m of Tm/Ho codoped silica fiber. Mode locking is obtained via nonlinear polarization rotation using a c-band polarization sensitive isolator with two polarization controllers. The laser is able to pulse separately at either 1.97 or 2.04 μm by altering the intracavity polarization during the initiation of mode locking. The codoped fiber permits pulsing at one of two wavelengths, where the shorter is due to the Tm3+ emission and the longer due to the Ho3+ emission. The laser produces a stable pulse train at 28.4 MHz with 25 mW average power, and a pulse duration of 966 fs with 9 nm bandwidth.

© 2012 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(190.4370) Nonlinear optics : Nonlinear optics, fibers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: June 18, 2012
Revised Manuscript: August 17, 2012
Manuscript Accepted: August 17, 2012
Published: September 11, 2012

Citation
Rajesh Kadel and Brian R. Washburn, "All-fiber passively mode-locked thulium/holmium laser with two center wavelengths," Appl. Opt. 51, 6465-6470 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-27-6465

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