Open AccessMode locked multi-core photonic crystal fiber laser
Author(s) -
Xiaohui Fang,
Minglie Hu,
Youjian Song,
Chen Xie,
Li Chai,
Qingyue Wang
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.064208
Subject(s) - materials science , optics , fiber laser , photonic crystal fiber , laser , core (optical fiber) , optoelectronics , fiber bragg grating , slope efficiency , mode locking , dispersion (optics) , fiber , saturable absorption , physics , wavelength , composite material
A mode locked fiber laser based on Yb-doped large mode area photonic crystal fiber operating in the all-normal dispersion regime is experimentally studied. The eighteen cores of the gain fiber are arranged in array-type geometry with an equivalent mode diameter of about 52 μm. A sigma laser cavity is used without using any elements for dispersion compensation. Reliable self-starting mode-locking is achieved using a fast semiconductor saturable absorber mirror. The laser directly produces 4.92 ps chirped pulses at a 44.68 MHz repetition rate for an average power of 3.3 W corresponding to a pulse energy of 74 nJ. The pulses are compressed to 780 fs with a grating pair outside the cavity.