title: Coherent combining of pulsed fiber amplifiers in the nonlinear chirp regime with intra-pulse phase control.
abstract: Two high pulse contrast (> 95 dB) polarization maintaining all-fiber amplifier chains were coherently combined to generate 0.42 mJ, 1 ns 25 kHz pulses with 79% efficiency despite 38 radians of intra-pulse phase distortion. A recursive intra-pulse phase compensation method was utilized to correct for the large nonlinear chirp providing a path for improved coherent waveform control of nanosecond pulse trains.
authors.affiliation: Northrop Grumman Aerospace Systems, One Space Park, Redondo Beach, California 90045, USA. steven.palese@ngc.com
authors.forename: Stephen
authors.initials: S
authors.lastname: Palese
authors.forename: Eric
authors.initials: E
authors.lastname: Cheung
authors.forename: Gregory
authors.initials: G
authors.lastname: Goodno
authors.forename: Chun-Ching
authors.initials: CC
authors.lastname: Shih
authors.forename: Fabio
authors.initials: F
authors.lastname: Di Teodoro
authors.forename: Timothy
authors.initials: T
authors.lastname: McComb
authors.forename: Mark
authors.initials: M
authors.lastname: Weber
mesh_terms: D000669:Amplifiers, Electronic; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D017711:Nonlinear Dynamics