Title :
GaAs/GaAlAs integrated twinguide DFB BCRW lasers with first-order contacted surface grating
Author :
Zhang, Xiaobing ; Shahparonjan, W. ; Grothe, H. ; Harth, W. ; Hommel, J. ; Kaden, C. ; Schweizer, H. ; Pilkuhn, M.H.
Author_Institution :
Lehrstuhl fur Allgemeine Elektrotech. und Angewandle Elektron., Tech. Univ. Munchen, Germany
Abstract :
GaAs/GaAlAs integrated twinguide DFB lasers with first-order contacted surface grating are fabricated from MBE-wafers by electron beam lithography and ion milling. A room temperature CW threshold current of 40 mA is obtained for a BCRW structure with a coupling coefficient of 60 cm-1. The lasers exhibit stable singlemode operation with a sidemode suppression of more than 25 dB.
Keywords :
III-V semiconductors; aluminium compounds; diffraction gratings; distributed feedback lasers; gallium arsenide; integrated optics; optical waveguides; semiconductor junction lasers; 40 mA; BCRW lasers; CW threshold current; DFB lasers; GaAs-GaAlAs; MBE-wafers; coupling coefficient; electron beam lithography; first-order contacted surface grating; integrated twinguide; ion milling; room temperature; semiconductor laser; sidemode suppression; stable singlemode operation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920265
