Harmonic fundamental self-pulsations from a laser diode using phase-conjugate optical feedback
| Autor: | Emeric Mercier, Delphine Wolfersberger, A. Karsaklian dal Bosco, Marc Sciamanna |
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| Přispěvatelé: | OPTEL - Equipe Optique et électronique pour les télécoms |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Distributed feedback laser Laser diode business.industry Physics::Optics Saturable absorption Laser 01 natural sciences law.invention Semiconductor laser theory 010309 optics Optics law Harmonics 0103 physical sciences Harmonic [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Optoelectronics Semiconductor optical gain 010306 general physics business |
| Zdroj: | Proceeding of SPIE, Semiconductor Lasers and Laser dynamics SPIE Photonics Europe: Semiconductor Lasers and Laser Dynamics SPIE Photonics Europe: Semiconductor Lasers and Laser Dynamics, Apr 2014, Brussels, Belgium. pp.1-6, ⟨10.1117/12.2052302⟩ |
| DOI: | 10.1117/12.2052302⟩ |
| Popis: | International audience; Thanks to the band-gap engineering of quantum confined semiconductor materials and the development of semiconductor-based saturable absorber mirrors, recent years have seen the development of compact and low-cost external-cavity laser diodes generating pulses at several tens of GHz. The physics of the bifurcation leading to selfpulsation leads however to an intrinsic limitation: the fundamental repetition rate is fixed to and limited by the externalcavity round-trip time. By contrast, we demonstrate here that an external-cavity diode laser may generate fundamental self-pulsating dynamics at harmonics of the external-cavity frequency, when a phase conjugate mirror replaces the conventional mirror. As is known from theory, a laser diode with phase conjugate external feedback supports a single stationary solution that bifurcates to self-pulsating dynamics of increasing frequency when increasing the amount of light reflected back to the laser diode. The self-pulsation frequency then increases in step of the external-cavity frequency as one increases the feedback strength. We provide here the first experimental evidence of such harmonic external-cavity fundamental self-pulsation. As a proof-of-concept, we generate experimentally a self-pulsating dynamics at twice and three times the fundamental external-cavity frequency using an edge-emitting laser with a self-pumped ring-cavity photorefractive phase conjugator. Numerical simulations also predict stable higher harmonics. |
| Databáze: | OpenAIRE |
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