OPTICAL PULSE COMPRESSION METHOD AND ITS DEVICE

摘要

PROBLEM TO BE SOLVED: To solve the problems that a mode lock laser and a distributed feedback type laser require a strong continuous light stimulating light source or separate mode lock laser light beams to stimulate short pulses respectively and are expensive and the ratio between the main section of a short pulse and a front section can not be made large because nonignored strong light beams are associated with the front and the back of a simple single pulse taken out (please refer to Figure 1) due to the fact that the output of the laser is fundamentally a pulse train. SOLUTION: In a new pulse generation method, a laser pulse whose tip end section is made steeper is saturation amplified by the laser having a wide amplification gain frequency band.