Nonuniform output characteristics of laser diode with wet-etched spot-size converter.
We study the output characteristics of spot-size converter (SSC) integrated buried heterostructure (BH) laser diode (LD) by forming SSC with wet etching process. SSC-LD shows large chip-to-chip variation in threshold current(Ith) and slope efficiency (eta(slope)) compared to LD without SSC. Ith and eta(slope) are closely related with each other so that the front facet eta(slope) increases while the rear facet eta(slope) decreases with Ith. Far-field angle is also found to be proportional to the front facet eta(slope). The trends observed are explained clearly by a unidirectional loss occurring when photons travel from the front to rear facet.
Electronics and Telecommunications Research Institute, Daejeon 305-700, Korea. jschoe@etri.re.kr
Joong-Seon
JS
Choe
Yong-Hwan
YH
Kwon
Sung-Bock
SB
Kim
Jung Jin
JJ
Ju
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D008962:Models, Theoretical; D017711:Nonlinear Dynamics