SYNCHRONOUS MODE-LOCKING USING PUMP-INDUCED PHASE MODULATION

Synchronous mode locking using phase modulation directly from the pump laser is demonstrated for what is to our knowledge the first time. A synchronously mode-locked erbium/ytterbium fiber laser pumped with a N d YAG laser delivers 2.4-ps pulses at a repetition rate of 100 MHz. Th e emission wavelength is self-adjusting to the cavity length within a locking of 1 mm. The relative timing jitter is consistently less than 40% of the fiber laser pulse width and less than 1% of the pump pulse width.