DocumentCode :
1112017
Title :
Reduction of absorption loss in asymmetric twin waveguide laser tapers using argon plasma-enhanced quantum-well intermixing
Author :
Huang, Yu ; Xia, Fengnian ; Menon, Vinod M. ; Forrest, Stephen R. ; Gokhale, Milind
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., NJ, USA
Volume :
16
Issue :
10
fYear :
2004
Firstpage :
2221
Lastpage :
2223
Abstract :
Lasers based on asymmetric twin waveguide integration technology are limited by the necessity of pumping the tapers to avoid absorption losses within this section of the active region. Here, we demonstrate that the threshold current is reduced by argon plasma-enhanced quantum-well intermixing in the taper. Intermixing induces a (57±5) nm wavelength blue shift in the emission peak, accompanied by a <12-nm linewidth broadening of the photoluminescence spectrum, indicating minimal material degradation. The threshold current of a 0.6-mm-long laser is reduced by (18±1)% to (27±1) mA using an intermixed taper as compared to a nonintermixed structure.
Keywords :
integrated optics; optical losses; photoluminescence; quantum well lasers; semiconductor quantum wells; spectral line broadening; spectral line shift; waveguide lasers; 26 to 28 mA; Ar; absorption loss; argon plasma; asymmetric twin waveguide; blue shift; inductively coupled plasma; linewidth broadening; material degradation; photoluminescence spectrum; photonic integrated circuits; quantum-well intermixing; twin waveguide integration technology; twin waveguide laser tapers; Absorption; Argon; Laser excitation; Photoluminescence; Plasma materials processing; Plasma waves; Pump lasers; Quantum well lasers; Threshold current; Waveguide lasers;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2004.834488
Filename :
1336883
Link To Document :
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