Ring laser having an output at a single frequency
This patent describes a ring laser that produces a single frequency of laser radiation in either the pulsed mode of operation or the continuous waveform (cw) mode of operation. The laser comprises a ring laser in a bowtie configuration, a birefringent gain material such as Nd:YLF, an improved optical diode that supports laser oscillation having a desired direction of travel and linear polarization, and a Q-switch. An output coupler (mirror) having a high reflectivity, such as 94%, is disclosed. Also disclosed is a self-seeded method of operation in which the laser can provide a pulse or a series of pulses of high power laser radiation at a consistent single frequency with a high degree of amplitude stability and temporal stability. In operation, the laser is operated in continuous waveform (cw) at a low power output with the Q-switch introducing a loss into the resonating cavity. Pumping is continued at a high level, causing the gain material to store energy.
- Assignee:
- Dept. of Energy, Washington, DC (USA)
- Patent Number(s):
- US 5022033; A
- Application Number:
- PPN: US 7-428540
- OSTI ID:
- 5539236
- Resource Relation:
- Patent File Date: 30 Oct 1989
- Country of Publication:
- United States
- Language:
- English
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Ring laser having an output at a single frequency
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