Coherent light generators – Particular beam control device – Control of pulse characteristics
Patent
1990-07-31
1992-07-07
Epps, Georgia Y.
Coherent light generators
Particular beam control device
Control of pulse characteristics
372 26, 372 29, 372 30, 372 31, 372 38, 359180, 359181, H01S 310
Patent
active
051289504
ABSTRACT:
A low noise pulsed light source using a laser diode for generating a short pulsed light of a high repetitive frequency. The low noise pulsed light source includes a laser diode drived by an electric pulse generator for emitting repetitive pulsed light; a current source for supplying a bias current to the laser diode; and a photodetector for detecting the repetitive pulsed light emitted from the laser diode; and control means. The control means modulates at least one of the bias current from the current source and the amplitude of a pulse signal generated from the electric pulse generator in accordance with an output signal from the photodetector such that the intensity of the pulsed light is kept unchanged and any noise involved in the same is reduced.
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Nakamura Takuya
Takahashi Hironori
Tsuchiya Yutaka
Epps Georgia Y.
Hamamatsu Photonics K.K.
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