Narrowing of the emission spectra of high-power laser diodes with a volume Bragg grating recorded in photo-thermo-refractive glass
| Autor: | A. I. Ignat’ev, I. S. Tarasov, N. A. Pikhtin, Nikolay Nikonorov, Ya V Lubyanskiy, V. V. Zolotarev, S. A. Ivanov |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Distributed feedback laser Materials science Laser diode Holographic grating business.industry Physics::Optics Grating Condensed Matter Physics Laser 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics Ultrasonic grating Optics Fiber Bragg grating law 0103 physical sciences Blazed grating Optoelectronics Physics::Atomic Physics business |
| Zdroj: | Semiconductors. 50:819-823 |
| ISSN: | 1090-6479 1063-7826 |
| DOI: | 10.1134/s1063782616060087 |
| Popis: | The spectral characteristics of a high-power semiconductor laser with an external cavity in which longitudinal-mode selection is implemented by means of a holographic volume Bragg grating recorded in photo-thermo-refractive glass are investigated. Mode selection leads to narrowing of the spectrum of the laser diode from an initial width of 6 nm to 5 A. In the narrowed spectrum, a fine structure representing a set of eigenmodes that correspond to the length of a laser chip is resolved. The number of these modes is limited by the width of the spectral selectivity curve of the grating. It is shown that insertion of the grating into the cavity leads to severalfold enhancement of the grating selectivity. It is demonstrated that the implemented external-cavity design makes it possible to smoothly tune the laser emission wavelength in a 10-nm range. |
| Databáze: | OpenAIRE |
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