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Optical Engineering

Tunable external-cavity diode laser based on integrated waveguide structures
Author(s): Kevin S. Repasky; Jennifer Williams; John L. Carlsten; Elizabeth J. Noonan; Gregg Switzer
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Paper Abstract

Ion diffusion of rubidium (Rb) in potassium titanyl phosphate (KTP) creates areas of high Rb concentration. The areas of high Rb concentration have an index of refraction of nRb = 1.846 as compared to the index of refraction for the KTP of nK = 1.842. The small change in the index of refraction is enough to create waveguide structures and integrated optics such as Bragg gratings in the KTP substrate. A tunable external-cavity diode laser is constructed using waveguide structures and integrated optics created by this ion diffusion. The resulting Bragg grating is used to provide optical feedback to control the operating wavelength of an external-cavity laser. Tuning is accomplished using the electro-optic properties of KTP to control the effective period of the Bragg grating. A tuning response of R = 19.5 MHz/V was measured.

Paper Details

Date Published: 1 August 2003
PDF: 6 pages
Opt. Eng. 42(8) doi: 10.1117/1.1590319
Published in: Optical Engineering Volume 42, Issue 8
Show Author Affiliations
Kevin S. Repasky, Montana State Univ./Bozeman (United States)
Jennifer Williams, Montana State Univ. (United States)
John L. Carlsten, Montana State Univ. (United States)
Elizabeth J. Noonan, AdvR Inc. (United States)
Gregg Switzer, AdvR, Inc. (United States)

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