PHOTONIC-CRYSTAL FIBER;
SAGNAC LOOP MIRROR;
RING LASER;
NM;
POLARIZATION;
WAVELENGTH;
D O I:
10.1134/S1054660X12010173
中图分类号:
O43 [光学];
学科分类号:
070207 ;
0803 ;
摘要:
Multi-wavelength Ytterbium-doped fiber laser (YDFL) is demonstrated using a longitudinal mode interference assisted by a four-wave mixing (FWM) effect in a ring laser cavity. The gain medium is a 16 m long of the fabricated (Ytterbium-doped fiber) YDF, which has a core composition of 0.8 wt % of Yb2O3, 1.8 wt % of Al2O3 and 23 wt % of GeO2, Ytterbium ion fluorescence lifetime of 1.1 ms and absorption of 9.0 dB/m at the pump wavelength of 976 nm. 20 m long photonic crystal fiber (PCF) is used to provide FWM effect so that the energy of different oscillating lines can be redistributed to improve multi-wavelength operation. The proposed laser generates 12 lines of optical comb with a line spacing of approximately 0.59 nm at 1035 nm region.