Title :
A novel compact 35 A/150 ps current pulse generator for a new generation of the laser radars
Author :
Vainshtein, S. ; Kostamovaara, J. ; Kilpela, A. ; Maata, K.
Author_Institution :
Dept. of Electr. Eng., Oulu Univ., Finland
Abstract :
A current pulse generator is presented which allows a 35 A current amplitude with a rise time of 150 ps to be achieved across a low-ohmic load. The generator is based on an avalanche transistor matrix with intrinsic switching synchronisation. The front of the pulse is further sharpened by employing sub-nanosecond diode recovery in the first stage and super-fast switching of another diode under pulsed reverse biasing in the second stage. An application of this current pulse for the feeding of a high-power gain-switched semiconductor laser is demonstrated
Keywords :
charge storage diodes; driver circuits; field effect transistor circuits; laser accessories; optical radar; power supplies to apparatus; pulse generators; semiconductor lasers; switching circuits; 150 ps; 35 A; current amplitude; current pulse generator; high-power gain-switched semiconductor laser; intrinsic switching synchronisation; laser radars; low-ohmic load; pulsed reverse biasing; rise time; subnanosecond diode recovery; super-fast switching; Breakdown voltage; Diode lasers; Laser radar; Laser theory; Optical pulse generation; Optical pulses; Optical transmitters; Power semiconductor switches; Pulse generation; Semiconductor diodes;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Conference_Location :
Sacramento, CA
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.666055
