Optical pulse generator

摘要

The invention relates to an optical pulse generator. The optical pulse generator comprises a laser pulse oscillating means (R) for generating an optical pulse by means of harmonic mode locking using a clock (CLK) possessing a predetermined modulation frequency, a clock extracting means (9) for detecting said optical pulse, extracting a signal component of said modulation frequency, and supplying the extracted signal to said laser pulse oscillating means as said clock, and protective means (8, 20) for limiting the optical power of said optical pulse which is emitted from said laser pulse oscillating means to an optical power which said clock extracting means is capable of photo-detecting, and emitting the result to said clock extracting means.