Title :
High-frequency modulation of a QW diode laser by dual modal gain and pumping current control
Author :
Gorfinkel, V.B. ; Kompa, G. ; Novotny, M. ; Gurevich, S.A. ; Shtengel, G.E. ; Chebunina, I.E.
Author_Institution :
Fachgebiet Hochfrequenztechnik, Kassel Univ., Germany
Abstract :
A novel dual modulation technique is proposed and realized for a new four terminal QW diode laser structure. The simultaneous output modulation by modal gain and pumping current density (G&J) control was investigated experimentally. Applying a step-like electric signal with a 20 ps rise-time to the side contacts resulted in the laser switching-off time of the same value. The dynamic laser parameters were extracted from RF measurements, and simulation of the laser response to the dual G&J modulation was carried out. A 3dB bandwidth as broad as 60 GHz has been obtained at moderate laser output powers. In millimeterwave region the laser output response decays as 1spl omega/.<>
Keywords :
current density; electric current control; gain control; optical modulation; optical pumping; semiconductor lasers; 60 GHz; HF modulation; QW diode laser; RF measurements; dual modulation technique; dynamic laser parameters; four terminal quantum well LD; high-frequency modulation; laser output response; millimeterwave region; modal gain control; pumping current control; pumping current density; Current control; Diode lasers; Laser excitation; Laser modes; Laser theory; Optical control; Pulsed laser deposition; Pump lasers; Semiconductor lasers; Surface emitting lasers;
Conference_Titel :
Electron Devices Meeting, 1993. IEDM '93. Technical Digest., International
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-1450-6
DOI :
10.1109/IEDM.1993.347246
