19 August 1997 Generating optical pulses for a fast laser radar
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Abstract
Laser pulsing techniques utilizing gain switching and Q- switching operation modes of commercially available SH and DH laser diodes have been studied to realize powerful and fast laser pulses for industrial applications of pulsed time-of-flight laser range finding techniques. Pulses with the length of 100 ps to some nanoseconds and peak power level of 50 to 200 W have been aimed at. As an example, with a high speed current driver realized with a combination of an avalanche transistor matrix and a DSRD, an isolated pulse with a peak power level of 200 W and a pulse length of 100 ps was achieved from a DH laser diode operating under the gain switching region. Internal Q-switching mechanisms of SH laser diodes enable the lasers to achieve a pulse power of 100 W and a pulse width in the range of 100-200 ps.
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Ari Kilpelae, Sergey N. Vainshtein, Juha Tapio Kostamovaara, "Generating optical pulses for a fast laser radar", Proc. SPIE 3101, New Image Processing Techniques and Applications: Algorithms, Methods, and Components II, (19 August 1997); doi: 10.1117/12.281286; https://doi.org/10.1117/12.281286
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