Optical limiter
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United States of America Patent
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-
Feb 2, 1988
Issued Date -
N/A
app pub date -
Jun 11, 1985
filing date -
Jun 10, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical device that stabilizes the power in a cw laser beam comprises a material whose absorption coefficient increases wth increasing incident intensity. The same device acts as an energy limiter and pulse shortener for a pulsed laser. In either case, the device can be located either within the laser cavity or outside it. In another embodiment, the device is placed into the cavity of a passively mode-locked laser to permit mode-locking with laser materials that have high gain-saturation energy. Materials suitable for use in the device include Cr-doped crystalline solids and organic solutions, such as laser dyes, saturable absorber dyes, etc.
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