Picosecond laser dynamics of gain‐coupled and index‐coupled InGaAs/InGaAlAs quantum well distributed feedback lasers

Autor:	Heinz Schweizer, C. Kaden, Holger Schmidt, J. Kovac, H.-P. Gauggel, A. Hase, H. Künzel, V. Hofsäss
Rok vydání:	1995
Předmět:	Coupling Materials science Physics and Astronomy (miscellaneous) business.industry Physics::Optics Grating Laser Semiconductor laser theory law.invention Optics Laser diode rate equations Modulation law Optoelectronics Physics::Atomic Physics business Tunable laser Quantum well
Zdroj:	Applied Physics Letters. 67:816-818
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.115453
Popis:	High frequency modulation of gain‐coupled (GC) and index‐coupled (IC) InGaAs/InGaAlAs distributed feedback (DFB) lasers is investigated. Laser dynamics of conventionally fabricated IC DFB lasers are compared with GC DFB lasers realized by the new technology of masked implantation enhanced intermixing. Band structure dependence of the modulation response at low temperature (T=2K) is analyzed by detuning the emission energy of the DFB lasers with respect to the gain maximum using different grating periods. Pulse widths decreasing from 53 ps down to 4.5 ps with increasing emission energy demonstrate the capability of both coupling types. The experimental results are in excellent agreement with a theory without any fit parameter based on laser rate equations.
Databáze:	OpenAIRE
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