Coherent light generators – Particular beam control device – Q-switch
Patent
1989-02-13
1990-07-31
Sikes, William L.
Coherent light generators
Particular beam control device
Q-switch
372 20, H01S 3117, H01S 310
Patent
active
049455397
ABSTRACT:
An acousto-optic tunable filter, for laser tuning, comprises an acoustic transducer connected to one face of an anisotropic crystal or Bragg cell which is cut at such an angle relative to its optic axis that an acoustic wave projected into the crystal normal to the face causes wavelength-specific diffraction of an incident optic wave (from a laser amplifying element) which nearly, but not completely, satisfies the parallel-tangents phase matching condition, thus preserving a substantial angular field of view, the angle also being such that the diffraction is polarization-insensitive.
REFERENCES:
patent: 3725812 (1973-04-01), Scott
patent: 3749476 (1973-07-01), Daly et al.
patent: 4057770 (1977-11-01), Henningsen et al.
Klann et al.; "Highly Stable Acousto-Optic Mode-Locking Using Active Feedback; Optics Comm."; vol. 38, Nos. 5,6; pp. 390-392.
Bagshaw John M.
Kent Lionel W. J.
Payne Steven J.
Willats Terence F.
Epps Georgia Y.
Sikes William L.
The General Electric Company p.l.c.
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