Ion-exchanged tapered-waveguide laser in neodymium-doped BK7 glass
Optics Letters, Vol. 25, Issue 19, pp. 1433-1435 (2000)
http://dx.doi.org/10.1364/OL.25.001433
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Abstract
We report what is to our knowledge the first operation of a planar dielectric tapered-waveguide laser. The waveguide laser is fabricated by potassium-ion exchange in Nd3+ -doped BK7 glass and consists of a single-mode channel waveguide of a few micrometers' width followed by a linear taper up to a broad region with a width of ∼180µm . A slope efficiency of 42% is found both in the tapers and in standard channel waveguides fabricated upon the same substrate, indicating that the tapers and the channels have similar internal losses; hence the low-loss nature of the tapered beam expansion. The output from either end of the tapered structure is found to be nearly diffraction limited.
© 2000 Optical Society of America
[Optical Society of America ]
OCIS Codes
(140.3410) Lasers and laser optics : Laser resonators
(140.3460) Lasers and laser optics : Lasers
(140.3580) Lasers and laser optics : Lasers, solid-state
(230.7370) Optical devices : Waveguides
Citation
S. J. Hettrick, J. I. Mackenzie, R. D. Harris, J. S. Wilkinson, D. P. Shepherd, and A. C. Tropper, "Ion-exchanged tapered-waveguide laser in neodymium-doped BK7 glass," Opt. Lett. 25, 1433-1435 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-19-1433
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