The laser beam modulation frequency has been increased to achieve better accuracy. The circuit has been designed in a simple manner to reduce unexpected error and debugging complexity.

Nowadays, the mainstream of far field beam smoothing technology adopted by foreign high power laser drivers is smoothing by spectral dispersion (SSD) based upon sinusoidal frequency modulation.

This sensor featuring plane-convex lens collimator for expanding beam and coupling, and a low frequency for light pulse modulation is introduced.