Reduction of timing jitter in passively Q-switched microchip lasers using self-injection seeding

摘要

We present an efficient, simple, and passive technique for the reduction of timing jitter in passively Q-switchednmicrochip lasers via self-injection seeding using a fiber delay line. The presented approach mitigates one inherentnissue of passively Q-switched lasers without the need for active stabilization. At a repetition rate of a few hundrednkilohertz and pulse duration of ~200 ps delivered by a microchip laser, the rms jitter is reduced from severalnnanoseconds down to 20 ps, hence, significantly below the pulse duration of the laser source.