Analysis of an interferometer with acoustic surface waves on one mirror.
It has been demonstrated that surface waves propagating on one mirror of an interferometer form an optical diffraction grating. Experimentally confirmed analyses of an interferomet er with 95.5% reflectivity mirrors now indicate that a surface wave power density of 0.028 mW/mm.MHz is required to diffract 1% of transmitted light into the first order beam. This power can be diminished by a factor of more than 20 by increasing the mirror reflectivity to 99%.
Diffraction of light by surface acoustic waves
Diffraction of light by surface acoustic waves in quartz is reported. Optical heterodyne detection of the diffracted light is described. Experimental observations are shown to be in approximate agreement with theoretical predictions.
Unidirectional surface wave transducer
A surface wave transducer is described which radiates acoustic power in essentially one direction. Using Y cut, Z axis propagating lithium niobate and unidirectional transducers, a delay line has been constructed that exhibits 6.5-dB insertion loss and 52-dB triple-transit echo suppression at 106.5 MHz.