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

D. G. Lancaster; S. Gross; A. Fuerbach; H. Ebendorff Heidepriem; T. M. Monro; M. J. Withford

doi:10.1364/OE.20.027503

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

D. G. Lancaster^*, S. Gross, A. Fuerbach, H. Ebendorff Heidepriem, T. M. Monro, M. J. Withford

^*Corresponding author for this work

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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 freerunning 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.

Original language	English
Pages (from-to)	27503-27509
Number of pages	7
Journal	Optics Express
Volume	20
Issue number	25
DOIs	https://doi.org/10.1364/OE.20.027503
Publication status	Published - 3 Dec 2012

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-20-25-27503. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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title = "Versatile large-mode-area femtosecond laserwritten Tm:ZBLAN glass chip lasers",

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 freerunning 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.",

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note = "This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-20-25-27503. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.",

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AU - Fuerbach, A.

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AU - Monro, T. M.

AU - Withford, M. J.

N1 - This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-20-25-27503. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

PY - 2012/12/3

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N2 - 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 freerunning 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.

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

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