Mirror-grating tuning arrangement for high resolution lasers
Patent
·
OSTI ID:5893553
A tuning arrangement for a tunable laser comprises a single holographic grating and two flat surface reflective mirrors. The beam from the laser cavity is incident on the grating at a grazing angle for optimum beam expansion. The diffracted beam propogates from the grating to the first mirror, therefrom to the second mirror and is reflected at the Littrow angle to the grating, whereat it is diffracted a second time and returned to the second mirror for reflection to the first mirror. Therefrom it is reflected back to the grating. After undergoing a third diffraction it is directed back into the cavity for further amplification.
- Assignee:
- California Institute of Technology
- Patent Number(s):
- US 4559500
- OSTI ID:
- 5893553
- Country of Publication:
- United States
- Language:
- English
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