Open AccessSmall-Signal Theory and Design of Traveling-Wave Semiconductor Cascade Lasers
Author(s) -
H. Hashim,
S. Iezekiel
Publication year - 2010
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2010.2044500
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
Traveling-wave semiconductor cascade lasers (TWSCLs) are a form of series cascade laser (SCL) in which series-connected laser diodes are interconnected with commensurate transmission lines to create a periodically loaded structure. The inclusion of transmission line segments allows broadband impedance matching in addition to preserving the link gain improvements of conventional SCLs. This paper describes the small-signal analysis of TWSCLs using both transmission line theory and Bloch waves. The latter technique is then applied to a study of how transmission line and laser diode parameters affect both the return loss and gain-bandwidth product of TWSCLs.