Open AccessCoherent femtosecond pulse combining of multiple parallel chirped pulse fiber amplifiers
Author(s) -
Leo A. Siiman,
Wei Zung Chang,
Tong Zhou,
Almantas Galvanauskas
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.018097
Subject(s) - optics , femtosecond , detector , pulse shaping , femtosecond pulse shaping , coherence (philosophical gambling strategy) , pulse (music) , amplifier , physics , optoelectronics , laser , cmos , quantum mechanics
We report on femtosecond pulse combining with up to four parallel chirped-pulse fiber amplifier channels. Active phase locking is implemented using the LOCSET (Locking of Optical Coherence by Single-detector Electronic-frequency Tagging) single detector feedback technique, resulting in 96.4%, 94.0%, and 93.9% relative combining efficiency with two, three, and four channels respectively. Theoretical and experimental analysis of combining efficiency dependence on amplitude and phase noise shows convergence to a fixed value with increasing number of channels, indicating that multi-channel pulse combining with LOCSET feedback should be scalable to very large numbers of channels.