OPTICAL PULSE COMPRESSION USING BRAGG SCATTERING BY ULTRASONIC WAVES

Abstract
Pulse compression using Bragg scattering of light by an acoustic beam has been demonstrated. An ultrasonic delay line containing a frequency ramp signal is used to scatter monochromatic diverging light. If the incident and divergence angles are properly adjusted, the scattered light is focused and rapidly traverses a slit in front of a photodetector. A 1.16‐GHz, 2‐μsec pulse has been compressed to 18 nsec. Five‐nanosecond compressed pulses should be possible with this scheme.

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