Frequency conversion of fiber Raman lasers to visible regime and self-pulsed fiber Raman MOPA

摘要

Multiple cw visible lasers at wavelengths ranging from 550nm to 625nm were generated by intracavity frequency sum-mixing of a cascading fiber Raman laser in a type-Ⅰ noncritically phase-matched lithium triborate crystal. Self-pulsed lasers were generated in fiber Raman master oscillator power amplifiers, where the amplifier and oscillator are pumped by one laser source successively. The pulse periods are one or half of the round-trip time of the oscillator, depending on the optical length of the amplifier.