Self-injection locking technique

Details Self-injection locking technique Self-injection locking technique

1989-10-02

1991-01-01

Davie, James W.

Coherent light generators

Particular beam control device

Mode locking

372 25, 372 32, 372 99, 372103, 372106, H01S 3098

Patent

active

049824066

ABSTRACT:
A self-injection locking system is disclosed that internally narrows the prepulse of a laser cavity before it is replicated as the laser output using: two quarter wave plates, an air spaced etalon, and a polarizing beam splitter. The air spaced etalon will separate the off-center frequency signals from the center frequency signals of the prepulse by inducing a phase shift. Following this, the polarizing beam splitter impedes the off-center frequency signals by a power loss of about ten percent while the center frequency signals are unaffected. In operation, this can cause the off-center frequency signals to fail to reach the threshold at which stimulated emission takes place. The result is that the laser replicates only the center frequency signals as the laser output.

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