Patent ID: 9071037
Filing Date: 2015-06-30
Classification: H01S

Abstract:
1. A pulsed fiber laser amplification system comprising: a passively modelocked fiber oscillator outputting optical pulses, said passively modelocked fiber oscillator comprising a saturable absorber disposed in a temperature-controlled saturable absorber module and an oscillator pump that optically pumps said passively modelocked fiber oscillator, wherein said saturable absorber exhibits a multi-temporal lifetime and is configured in such a way that Q-switched mode-locking evolves at a low oscillator pump power followed by cw mode locking at a higher operational pump power that exceeds a threshold pump power for operation of said modelocked fiber oscillator; a fiber Bragg grating configured to control intra-cavity dispersion of said passively modelocked fiber oscillator and configured as a mirror of said passively modelocked fiber oscillator; a fiber amplifier optically connected to said modelocked fiber oscillator via a first optical path, said amplifier amplifying said optical pulses; an optical pump source optically connected to said fiber amplifier; a pulse compressor optically coupled to receive said amplified optical pulses output from fiber amplifier via a second optical path; and (i) a first optical tap in said first optical path between said modelocked fiber oscillator and said fiber amplifier, and a first feedback loop from said first tap to control said modelocked fiber oscillator based on measurement of output from said first optical tap, said first feedback loop from said first tap controlling at least said oscillator pump, and (ii) a second optical tap in said second optical path between said fiber amplifier and said compressor, and a second feedback loop from said second tap to control said fiber amplifier based on measurement of output from said second optical tap.