Metal‐grating‐outcoupled, surface‐emitting distributed‐feedback diode lasers
作者:
Masoud Kasraian,
Dan Botez,
期刊:
Applied Physics Letters
(AIP Available online 1996)
卷期:
Volume 69,
issue 19
页码: 2795-2797
ISSN:0003-6951
年代: 1996
DOI:10.1063/1.116846
出版商: AIP
数据来源: AIP
摘要:
The theoretical analysis of antiphase, surface‐emitting, complex‐coupled, distributed feedback (SE‐CC‐DFB) lasers is presented. The specific configuration chosen for analysis is relatively simple: a metallic second order grating placed atop a diode‐laser structure. This type of SE‐CC‐DFB structure can be fabricated by a lift‐off and evaporation process; can operate in a single‐lobed, orthonormal beam with a rather uniform near‐field intensity pattern, and external differential quantum efficiency, &eegr;d, values in excess of 30%. The dependence of the gain threshold on grating duty cycle for both the symmetric and antisymmetric (longitudinal) modes is presented and discussed. The external differential quantum efficiency for the symmetric mode is found to steadily increase with grating length at the expense of the degree of near‐field‐pattern uniformity. ©1996 American Institute of Physics.
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