1 August 2003 Tunable external-cavity diode laser based on integrated waveguide structures
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Optical Engineering, 42(8), (2003). doi:10.1117/1.1590319
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.
Kevin S. Repasky, Jennifer Williams, John L. Carlsten, Elizabeth J. Noonan, Gregg Switzer, "Tunable external-cavity diode laser based on integrated waveguide structures," Optical Engineering 42(8), (1 August 2003). http://dx.doi.org/10.1117/1.1590319
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KEYWORDS
Waveguides

Semiconductor lasers

Ferroelectric materials

Fiber Bragg gratings

Refraction

Rubidium

Electro optics

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