New concept of single-mode resonator for distributed feedback semiconductor and fiber lasers

Vladimir N. Seminogov; Alexander I. Khudobenko; Vladislav Ya. Panchenko; Victor I. Sokolov

doi:10.1117/12.221257

22 September 1995 New concept of single-mode resonator for distributed feedback semiconductor and fiber lasers

Vladimir N. Seminogov, Alexander I. Khudobenko, Vladislav Ya. Panchenko, Victor I. Sokolov

Proceedings Volume 2532, Application and Theory of Periodic Structures; (1995) https://doi.org/10.1117/12.221257
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The new concept of single-mode resonator for single-frequency distributed feedback (DFB) lasers is presented. This concept is based on embedded nonharmonic distributed Bragg structure with sinusoidally modulated coupling coefficient, which is a combination of two superimposed sinusoidal Bragg gratings of equal heights and slightly different periods. Resonant frequencies and corresponding threshold gains of such distributed resonator are calculated theoretically by using the coupled-mode theory. The designed resonator provides stable single-frequency oscillation and has lasing characteristics (frequencies and thresholds) very similar to those of well-known distributed resonator with quarter-wavelength shift. The developed concept of resonator with sinusoidally modulated coupling coefficient can be applied both to semiconductor laser diodes with incorporated Bragg relief grating and to DFB fiber lasers with refractive index grating. The important advantage of designed new single-mode Bragg structure, as compared to quarter-wavelength-shifted structure, is that it can be fabricated very easily on semiconductor surfaces and in photosensitive fibers by direct three-beam holographic writing.

Citation Download Citation

Vladimir N. Seminogov, Alexander I. Khudobenko, Vladislav Ya. Panchenko, and Victor I. Sokolov "New concept of single-mode resonator for distributed feedback semiconductor and fiber lasers", Proc. SPIE 2532, Application and Theory of Periodic Structures, (22 September 1995); https://doi.org/10.1117/12.221257

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KEYWORDS

Resonators

Modulation

Laser resonators

Semiconductor lasers

Fiber lasers

Phase shifts

Refractive index

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