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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 25 — Dec. 3, 2012
  • pp: 27503–27509

Versatile large-mode-area femtosecond laser-written Tm:ZBLAN glass chip lasers

D. G. Lancaster, S. Gross, A. Fuerbach, H. Ebendorff Heidepriem, T. M. Monro, and M. J. Withford  »View Author Affiliations

Optics Express, Vol. 20, Issue 25, pp. 27503-27509 (2012)

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We report performance characteristics of a thulium doped ZBLAN waveguide laser that supports the largest fundamental modes reported in a rare-earth doped planar waveguide laser (to the best of our knowledge). The high mode quality of waveguides up to 45 um diameter (~1075 μm2 mode-field area) is validated by a measured beam quality of M2~1.1 ± 0.1. Benefits of these large mode-areas are demonstrated by achieving 1.9 kW peak-power output Q-switched pulses. The 1.89 μm free-running cw laser produces 205 mW and achieves a 67% internal slope efficiency corresponding to a quantum efficiency of 161%. The 9 mm long planar chip developed for concept demonstration is rapidly fabricated by single-step optical processing, contains 15 depressed-cladding waveguides, and can operate in semi-monolithic or external cavity laser configurations.

© 2012 OSA

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3390) Lasers and laser optics : Laser materials processing
(140.3580) Lasers and laser optics : Lasers, solid-state
(230.7380) Optical devices : Waveguides, channeled

ToC Category:
Lasers and Laser Optics

Original Manuscript: September 25, 2012
Manuscript Accepted: November 4, 2012
Published: November 27, 2012

D. G. Lancaster, S. Gross, A. Fuerbach, H. Ebendorff Heidepriem, T. M. Monro, and M. J. Withford, "Versatile large-mode-area femtosecond laser-written Tm:ZBLAN glass chip lasers," Opt. Express 20, 27503-27509 (2012)

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