Distributed feedback lasers with an S-bent waveguide for high-power single-mode operation
| Autor: | B. Tromborg, O. Albrektsen, H. Olesen, J. Hanberg, B. Jonsson, A. Moller-Larsen, J Nørregaard, J. Salzman |
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| Rok vydání: | 1995 |
| Předmět: |
Materials science
business.industry Single-mode optical fiber Physics::Optics Grating Laser Atomic and Molecular Physics and Optics law.invention Optics law Modulation Physics::Accelerator Physics Wavenumber Optoelectronics Electrical and Electronic Engineering business Waveguide Diffraction grating Tunable laser |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 1:346-355 |
| ISSN: | 1077-260X |
| DOI: | 10.1109/2944.401214 |
| Popis: | DFB lasers with variations in the Bragg wavenumber along the cavity (corrugation-pitch modulation) can be designed to operate in a single mode up to high output powers. Practical implementation of various pitch-modulated DFB cavities is facilitated by bending the laser waveguide over a uniform grating, so that the Bragg wavenumber is varied along the cavity. In this paper, above-threshold behavior of such lasers is studied, and design rules for high power single-mode operation are developed. S-bent waveguide DFB lasers, fabricated according to our design criteria, exhibit single-mode operation with 40 dB side mode suppression ratio from threshold to 10/spl times/I/sub th/. > |
| Databáze: | OpenAIRE |
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