Tolerance to the phase-matching condition for the integrated acoustooptic filter.
An analysis on the tolerance to the phase-matching condition for the integrated acoustooptic filter using coupling of TE(0) and TE(1) modes is presented. It is found that at a film thickness near cutoff, the tolerance in the film surface variation is relatively large; however, the tolerance in the film index variation may cause serious problems. It is also shown that at this thickness, the transverse spatial coupling constant for the mode conversion is at its maximum.
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