Tunable narrowband filter based on a combination of Fabry-Perot etalon and volume Bragg grating |
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| Authors: | Lumeau J Glebov L B Smirnov V |
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| Affiliation: | CREOL, College of Optics and Photonics, University of Central Florida, Orlando, FL 32816-2700, USA. jlumeau@creol.ucf.edu |
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| Abstract: | A new type of tunable narrowband filter is proposed. This filter is a combination of a Fabry-Perot etalon, which permits the selection of a comb of discrete narrow bands, and a high-efficiency rotating volume Bragg grating recorded in photo-thermo-refractive glass, which permits tuning between the Fabry-Perot resonances. A tunable filter for fixed wavelengths in the region of 1.5 mum with a spectral width of 220 pm (FWHM), separation between channels of 800 pm, and throughput of 95% (losses <0.2 dB) is demonstrated. |
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