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|Title:||Versatile large-mode-area femtosecond laserwritten Tm:ZBLAN glass chip lasers|
|Citation:||Optics Express, 2012; 20(25):27503-27509|
|Publisher:||Optical Soc Amer|
|D. G. Lancaster, S. Gross, A. Fuerbach, H. Ebendorff Heidepriem, T. M. Monro, and M. J. Withford|
|Abstract:||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.|
|Keywords:||Fluorides; Lanthanum; Thulium; Sodium; Barium; Zirconium; Aluminum; Metals, Rare Earth; Glass; Refractometry; Equipment Design; Lasers|
|Rights:||© 2012 Optical Society of America|
|Appears in Collections:||IPAS publications|
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