Coherent light generators – Particular component circuitry – Optical pumping
Patent
1987-08-21
1988-02-02
Buczinski, Stephen C.
Coherent light generators
Particular component circuitry
Optical pumping
372 25, H01S 300, H01S 310
Patent
active
H00004367
ABSTRACT:
A low voltage trigger pulse is coupled to a three-stage driver which genees therefrom a high amplitude (e.g., 20 amp.) decaying current spike of predetermined width. The current pulse or spike from the driver is coupled to the gates of a multiplicity (i.e., 12) of parallel-connected field effect transistors (FETs) to turn or switch the same to the "ON" state. A laser diode array is series-connected with the parallel connected FETs so that when the latter is switched ON a very high (100 amp.) current pulse is delivered to the laser diode array to enable the same. At the cessation of the pulser current drive, a passive pull-down technique is used to enhance the turn-off of the parallel-connected FETs so that the laser diode array is quickly disabled. A protective overload circuit sets a limit to the average current through the laser diode array without affecting the pulse burst current.
Kerfoot Charles S.
Milberger Walter E.
Buczinski Stephen C.
Kanars Sheldon
Mullarney John K.
Murray Jeremiah G.
The United States of America as represented by the Secretary of
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