Journal
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume 15, Issue 2, Pages 328-336Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2008.2012134
Keywords
Multicore fibers; optical fiber lasers; phase locking; photonic crystal fibers (PGFs); Q-switched fiber laser; supermode selection
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Funding
- U.K. Ministry of Defence
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In this paper, the authors discuss the modal and lasing properties of multicore photonic crystal fiber lasers in the context of high power/energy production from fiber cores with very large mode area. Supermode selection methods like Talbot imaging or far-field aperturing are tested using 6-, 7-, and 18-core fibers. It is shown that in-phase mode selection is achieved efficiently by using either method. The fibers have been tested in continuous-wave (CW) and Q-switched laser operation. The mode field area is as large as 4240 mu m(2) for one of the fibers, providing up to 2 mJ of pulse energy in Q-switched operations with 30 ns pulse duration.
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