STUDY OF PHONON-OPTICAL INTERACTIONS.
MICROWAVE ELECTRONICS CORP PALO ALTO CALIF
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Exploratory research is described concerning phononphoton interactions in optical sources. These include a theoretical description of Bragg and Raman-Nath scattering caused by propagation of a plane acoustic wave through the path of a laser beam. This interaction is considered for intracavity operation with possibilities of modulation, frequency translation and output coupling. The conditions for synchronous mode operation are described. Modulation of an injection laser is considered on a theoretical basis with suggestions as to what results are to be attained and how the concept may be tested. Because boundary conditions are indeterminate for the injection laser, it was felt that experimental research should first deal with the intracavity modulation and coupling in an optically pumped laser. The interaction was tested in a ruby laser. The prime problem was associated with strains set up by the thermal shock created when the laser was operated in a pulsed mode. 850 Mc acoustic wave interaction was observed in the laser, its magnitude slightly above the noise level. Author
- Lasers and Masers