Abstract
The performance of an acoustooptic standing wave Raman-Nath deflector as active mode-locking switch is evaluated and compared with theory. The time averaged intensities of the diffracted beam up to the eight order are calculated for acoustic phase shifts up to Δϕ = 4. With fused quartz the highest attainable value of σm was 6.4 at 633 nm. In the theory describing the pulse width of homogeneously broadened AM mode-locked laser oscillators the modulation index σm is a parameter, given by δm = 2 Δϕ.
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