Self-injection locking technique
This patent describes a self-injection laser locking system. It comprises: a power source which outputs a high power pulse; a first and a second mirror. The second mirror having a central aperture; a gain cell which is fixed between the first and second mirrors and which generates a prepulse which will be replicated as a laser output when the gain cell receives the high power pulse from the power source. The gain cell thereby amplifying the prepulse above a threshold at which stimulated emission takes place. The laser output then exiting through the central aperture of the second mirror; and an internal means for spectrally narrowing the prepulse so that the laser output will be line narrowed when it replicates the prepulse. The internal spectrally narrowing means being fixed between the gain cell and the second mirror and conducting a center frequency signal of the prepulse therebetween with no losses while providing a power loss to off-center frequency signals so that the off-center frequency signals fail to reach the threshold at which stimulated emission takes place. The laser output thereby replicating only the center frequency signals and having a reduced linewidth when compared with an uncorrected laser output which replicates both the center frequency signals and the off-center frequency signals. The uncorrected laser output being an output produced by the gain cell when it operates without the spectrally narrowing means.
- Assignee:
- Secretary of the Air Force, Washington, DC (USA)
- Patent Number(s):
- US 4982406; A
- Application Number:
- PPN: US 7-415520
- OSTI ID:
- 5048112
- Resource Relation:
- Patent File Date: 2 Oct 1989
- Country of Publication:
- United States
- Language:
- English
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