DocumentCode :
765726
Title :
Dry-etched wire distributed feedback laser
Author :
Griesinger, U.A. ; Schweizer, H. ; Härle, V. ; Hommel, J. ; Barth, F. ; Höhing, B. ; Klepser, B. ; Scholz, F.
Author_Institution :
4. Phys. Inst., Stuttgart Univ., Germany
Volume :
7
Issue :
9
fYear :
1995
Firstpage :
953
Lastpage :
955
Abstract :
We report on the realization and the properties of dry-etched wire and wire-DFB lasers and compare them with two-dimensional (2-D) reference lasers. The starting vertical structure, which was optimized for low threshold, consists of four GaInAs quantum wells embedded in a GaInAsP waveguide. Even for very small longitudinal confinement factors of the order 0.23, the dry-etched wire lasers show laser operation up to 60/spl deg/C and a threshold current density at room temperature of 5 kA/cm/sup 2/ for simple oxide stripe lasers. For the wire lasers, an increase of the differential material gain of more than one order of magnitude (about a factor of 20) was measured, compared to conventional 2-D lasers. The wires were also arranged periodically with different grating constants to allow gain-coupled DFB laser operation. Clear single-mode emission has been found, as expected, from the gain-coupling mechanism.<>
Keywords :
III-V semiconductors; current density; distributed feedback lasers; gallium arsenide; indium compounds; laser modes; quantum well lasers; sputter etching; 60 degC; GaInAs; GaInAsP; GaInAsP waveguide; clear single-mode emission; differential material gain; distributed feedback laser; dry-etched wire; four GaInAs quantum wells; gain-coupled DFB laser operation; gain-coupling mechanism; grating constants; laser operation; low threshold; room temperature; simple oxide stripe lasers; starting vertical structure; threshold current density; two-dimensional reference lasers; very small longitudinal confinement factors; wire-DFB lasers; Distributed feedback devices; Gain measurement; Laser feedback; Optical materials; Quantum well lasers; Temperature; Threshold current; Two dimensional displays; Waveguide lasers; Wire;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/68.414666
Filename :
414666
Link To Document :
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