Ultra-low noise all fiber mode-locked laser

A new design of all fiber-based, mode-locked laser with ultra-low phase noise of -158 dBc/Hz at 1MHz is reported. Both high repetition rate optical pulses and microwave with ultra-low phase noise were generated using an injection locked actively mode-locked fiber laser. The obtained microwave showed much lower phase noise than that of the equivalent commercial synthesizer. As the laser used is all fiber-based, our design is a cost-effective solution for low noise microwave, and high repetition rate optical pulse train generators.