Broadly Tunable Laser Using Double-Rings Vertically Coupled to a Passive Waveguide
| Autor: | Dimitris Syvridis, Michael Hamacher, Alexandros Kapsalis, Helmut Heidrich |
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| Přispěvatelé: | Publica |
| Rok vydání: | 2010 |
| Předmět: |
Coupling
Fabrication Materials science business.industry Wafer bonding Physics::Optics Condensed Matter Physics Laser Waveguide (optics) Atomic and Molecular Physics and Optics law.invention Semiconductor laser theory Optics law Optoelectronics Electrical and Electronic Engineering business Free spectral range Tunable laser |
| Zdroj: | IEEE Journal of Quantum Electronics. 46:306-312 |
| ISSN: | 1558-1713 0018-9197 |
| DOI: | 10.1109/jqe.2009.2033714 |
| Popis: | A widely tunable laser source based on double microrings is presented which exhibits tuning range up to 46 nm. Two microrings consisting of active GaInAsP/InP material are vertically coupled with a straight transparent waveguide using full wafer bonding techniques. Wafer bonding allows the fabrication of ultra short couplers where the critical coupling gap can be epitaxially controlled. The microrings are operated above threshold and act as laser sources forming a coupled cavity system. Their respective radii are chosen to be slightly different, greatly extending the coupled cavity free spectral range (FSR) providing sufficiently high mode suppression ratio ( MSR > 30ndB). The isolation of adjacent rings allows an individual electrical control and enables a wavelength tuning with pm accuracy. The tuning mechanism benefits from the Vernier effect resulting in a broad range of achievable wavelengths in a systematic and repeatable way. |
| Databáze: | OpenAIRE |
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