frequency shifting
1.Analyses of the frequency-shifting and beam deflection of the Bragg acoustooptic interaction in cascade
4.The theory and basic light path are given in chapter2. And bases on the requirements of this item, a heterodyne LPDVM light path are designed, in order to realize the frequency shifting, an acoustooptic modulator is added in the reference light path, so the direction of the speed and be distinguish.
5.According to those formulas to revise expediently decimal values of control registers,a PWM output pulse with suited output frequency,delay time and phase-shifting angle is gained expediently by the TMS320LF2407A Demo module and a C & assembler languages program,in order to achieve a zero-voltage soft-switch operational mode of DC/DC full bridge spot-welding inverter power supply.

