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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 2 — Jan. 15, 2014
  • pp: 327–330

Highly efficient and robust operation of Kerr-lens mode-locked Cr:LiSAF lasers using gain-matched output couplers

Ferda Canbaz, Ersen Beyatli, Li-Jin Chen, Alphan Sennaroglu, Franz X. Kärtner, and Umit Demirbas  »View Author Affiliations


Optics Letters, Vol. 39, Issue 2, pp. 327-330 (2014)
http://dx.doi.org/10.1364/OL.39.000327


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Abstract

We present efficient and robust Kerr-lens mode locking (KLM) of a diode-pumped Cr:LiSAF laser using a gain-matched output coupler (GMOC). An inexpensive, battery-powered 660 nm single-spatial-mode diode was used as the pump source. GMOC enhances the effective self-amplitude modulation depth by reducing the gain-filtering effect in broadband KLM operation to provide significant improvement in efficiency and robustness. Pulsing can be initiated without careful cavity alignment and is sustained for hours. 13 fs pulses with an average power of 25 mW have been generated using only 120 mW of pump power. The corresponding pulse energy and peak power is 200 pJ and 15 kW for the 126 MHz repetition rate cavity. Optical-to-optical conversion efficiency of the system is 21%, which represents an order of magnitude improvement in reported efficiencies for such diode-pumped ultrashort-pulse KLM Cr:LiSAF lasers. The obtainable pulse width is currently limited by the dispersion bandwidth of the available optics and can be potentially reduced to below 7 fs.

© 2014 Optical Society of America

OCIS Codes
(140.4050) Lasers and laser optics : Mode-locked lasers
(320.7090) Ultrafast optics : Ultrafast lasers
(310.6845) Thin films : Thin film devices and applications

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 30, 2013
Revised Manuscript: December 2, 2013
Manuscript Accepted: December 2, 2013
Published: January 10, 2014

Citation
Ferda Canbaz, Ersen Beyatli, Li-Jin Chen, Alphan Sennaroglu, Franz X. Kärtner, and Umit Demirbas, "Highly efficient and robust operation of Kerr-lens mode-locked Cr:LiSAF lasers using gain-matched output couplers," Opt. Lett. 39, 327-330 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-2-327


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