Evaluation of an automatic method to extract the grating coupling coefficient in different types of fabricated DFB lasers
| Autor: | L. Gillner, A.-C. Morner, Olof Sahlen, J. Wallin, P. Granestrand, J. Terlecki, F. Wahlin, Richard Schatz, Lennart Lundqvist, O. Oberg, F. Pusa, B. Stoltz, J. Skagerlund |
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| Rok vydání: | 1998 |
| Předmět: |
Distributed feedback laser
Materials science business.industry Phase (waves) Physics::Optics Grating Condensed Matter Physics Laser Atomic and Molecular Physics and Optics law.invention Semiconductor laser theory Optics law Wavelength-division multiplexing Optoelectronics Spontaneous emission Physics::Atomic Physics Electrical and Electronic Engineering business Diffraction grating |
| Zdroj: | IEEE Journal of Quantum Electronics. 34:141-146 |
| ISSN: | 0018-9197 |
| DOI: | 10.1109/3.655017 |
| Popis: | Distributed feedback (DFB) laser parameters such as grating coupling coefficient, effective indices, facet reflectances, and the phases of facet reflectances have been determined using a method based on least-square fitting of theoretical spectra to measured, subthreshold DFB laser emission spectra. The only inputs needed are geometrical parameters such as length, grating period, and internal grating phase shifts. A larger number of devices have been successfully characterized, and consistent results have been obtained in both 1.3-/spl mu/m multi-quantum-well (MQW) DFB lasers with both facets as-cleaved, and in 1.55-/spl mu/m MQW DFB lasers with no, one, or two facets as-cleaved. |
| Databáze: | OpenAIRE |
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