Stabilizing DFB laser injection-locked to an external fiber-optic ring resonator
| Autor: | Vasily V. Spirin, Dmitry A. Korobko, Patrice Mégret, Andrei A. Fotiadi, José L. Bueno Escobedo |
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| Rok vydání: | 2020 |
| Předmět: |
Distributed feedback laser
Optical fiber Materials science business.industry Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention Semiconductor laser theory 010309 optics Longitudinal mode Laser linewidth Optics Fiber Bragg grating law Fiber laser 0103 physical sciences Physics::Atomic Physics 0210 nano-technology business |
| Zdroj: | Optics express. 28(1) |
| ISSN: | 1094-4087 |
| Popis: | Self-injection locking to an external fiber cavity is an efficient technique enabling drastic linewidth narrowing and self-stabilization of semiconductor lasers. The main drawback of this technique is its high sensitivity to fluctuations of the configuration parameters and surroundings. In the proposed laser configuration, to the best our knowledge, for the first time the self-injection locking mechanism is used in conjunction with a simple active optoelectronic feedback, ensuring stable mode-hopping free laser operation in a single longitudinal mode. Locking to 4-m length fiber resonator causes a drastic narrowing of the DFB laser linewidth down to 2.8 kHz and a reduction of the laser phase noise by three orders of magnitude. We have explored key features of the laser dynamics with and without active feedback, revealing stability and tunability of the laser linewidth as an additional benefit of the proposed technique. |
| Databáze: | OpenAIRE |
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