Distributed feedback gain-coupled lasers based on InGaAs quantum-wire arrays

Authors :: M. Glick
F. K. Reinhart
Denis Martin
P.C. Silva
P.-H. Jouneau
M. Achtenhagen
Y. Magnenat
J. Robadey
F. Bobard
U. Marti
F. Filipowitz
R.O. Miles
François Morier-Genoud
Source :: IEEE Photonics Technology Letters. 9:5-7
Publication Year :: 1997
Publisher :: Institute of Electrical and Electronics Engineers (IEEE), 1997.
Abstract: Fabrication and characterization of a current-injected InGaAs-GaAs quantum-wire gain-coupled distributed feedback (DFB) laser operating at 77 K at a wavelength of 923 nm are presented. Threshold current densities in broad area lasers were measured to be as low as 160 A/cm/sup 2/. The side-mode suppression ratio at twice threshold is 35 dB. A 4-/spl mu/m rib waveguide device has a threshold of 14 mA. The patterning process for the second-order DFB grating fabricated with deep UV holography and wet-chemical etching is described.