Optical: systems and elements – Optical amplifier – Dispersion compensation
Patent
1992-01-21
1994-02-08
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Dispersion compensation
359348, 372 94, H01S 305, H01S 323
Patent
active
052853101
ABSTRACT:
A regenerative amplifier design capable of operating at high energy per pulse, for instance, from 20-100 Joules, at moderate repetition rates, for instance from 5-20 Hertz is provided. The laser amplifier comprises a gain medium and source of pump energy coupled with the gain medium; a Pockels cell, which rotates an incident beam in response to application of a control signal; an optical relay system defining a first relay plane near the gain medium and a second relay plane near the rotator; and a plurality of reflectors configured to define an optical path through the gain medium, optical relay and Pockels cell, such that each transit of the optical path includes at least one pass through the gain medium and only one pass through the Pockels cell. An input coupler, and an output coupler are provided, implemented by a single polarizer. A control circuit coupled to the Pockels cell generates the control signal in timed relationship with the input pulse so that the input pulse is captured by the input coupler and proceeds through at least one transit of the optical path, and then the control signal is applied to cause rotation of the pulse to a polarization reflected by the polarizer, after which the captured pulse passes through the gain medium at least once more and is reflected out of the optical path by the polarizer before passing through the rotator again to provide an amplified pulse.
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Dane Clifford B.
Hackel Lloyd A.
Miller John L.
Zapata Luis E.
Moskowitz Nelson
Regents of the University of California
Sartorio Henry P.
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