Title :
70-GHz relaxation oscillation in a vertical cavity surface emitting laser
Author :
Tauber, D. ; Wang, Guibin ; Geels, R.S. ; Bowers, John E. ; Coldren, Larry A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA
fDate :
11/1/1992 12:00:00 AM
Abstract :
Summary form only given. Very-high-frequency relaxation oscillations were measured in an electrically pumped vertical cavity surface emitting laser (VCSEL). The measurements were performed over a range of drive currents, and a 71-GHz relaxation oscillation was observed when current injection was maximum. The lasers used for the measurements consisted of an active region of 3 In0.2Ga0.8As quantum wells. CW (continuous-wave) measurements showed a very high resonance frequency-square root of power coefficient of 7 GHz/√mW. The maximum resonance frequency was limited to 7 GHz by heating. The larger signal pulse responses also showed a linear dependence of relaxation oscillation frequency on square root of current above threshold, with a maximum of 71 GHz for a peak drive voltage on the order of 15 V
Keywords :
III-V semiconductors; gallium arsenide; indium compounds; oscillations; semiconductor lasers; 71 GHz; CW measurements; In0.2Ga0.8As quantum wells; VCSEL; current injection; drive currents; electrical pumping; maximum resonance frequency; relaxation oscillations; signal pulse responses; vertical cavity surface emitting laser; Current measurement; Electric variables measurement; Laser excitation; Performance evaluation; Pump lasers; Quantum well lasers; Resonance; Resonant frequency; Surface emitting lasers; Vertical cavity surface emitting lasers;
Journal_Title :
Electron Devices, IEEE Transactions on
