Active energy control for diode pumped laser systems using pulse

Details Active energy control for diode pumped laser systems using pulse Active energy control for diode pumped laser systems using pulse

1993-01-21

1994-03-01

Scott, Jr., Leon

Coherent light generators

Particular component circuitry

Optical pumping

372 25, 372 10, 372 29, 372 26, H01S 300

Patent

active

052915050

ABSTRACT:
An active energy control circuit and method employing pulsewidth modulation for use with diode pumped laser systems. The active energy control circuit and method employs optical energy feedback sensing and output control of the electrical pulsewidth to pump diodes of the laser system. This creates an active energy control loop for maintaining diode pumped laser output energy at a desired level over different pulse repetition frequencies, time, and environmental conditions. The diode pumped laser output energy is controlled by varying the pulsewidth of the output energy pulse while maintaining a current amplitude set point. By using a pulsewidth-modulation-based control system, the current applied to the pump diodes is regulated at an efficient set point below their damage level, and the pulsewidth is adjusted to maintain a desired output optical energy of the laser system. The pulse width modulated output energy control scheme provided by the present invention is appropriate for all diode pumped laser applications including laser rangefinders, laser designators, laser radar systems, laser welding systems, and other low and high power laser systems.

REFERENCES:
patent: 5144631 (1992-09-01), Okino

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