Chinese Optics Letters, 2013, 11 (12): 120603, Published Online: Dec. 13, 2013
Dual-wavelength fiber grating laser in linear overlapping cavity Download: 687次
060.2320 Fiber optics amplifiers and oscillators 060.3735 Fiber Bragg gratings 060.3510 Lasers, fiber
Abstract
We report a switchable dual-wavelength fiber grating laser in linear overlapping cavity. The laser features two overlapping cavities sharing a single Yb-doped gain medium fiber and two sets of fiber Bragg gratings. A coiling fiber setup is inserted into the 1035 nm laser cavity. Given that the bending loss is inversely related to the bending radius, the cavity loss of 1035-nm can be modulated. Modulating the bending loss facilitates the switching of the fiber grating laser to a single-or dual-wavelength output at 1030 or 1035 nm and convenient tuning of the power ratio of the two wavelengths. An approximately 152.6-mW output power and up to 38-dB polarization extinction ratio are observed. The simultaneous lasing at 1030 and 1035 nm is a qualified seeder source for amplification to high power scale and can be applied to difference frequency generation of a terahertz signal. This dual-wavelength fiber grating laser is a potential pump source for generating terahertz radiation using a novel approach.
Yaqian Ding, Yunfeng Qi, Yuan Liu, Fuyang Jia, Kejia Wang, Xijia Gu, Jun Zhou. Dual-wavelength fiber grating laser in linear overlapping cavity[J]. Chinese Optics Letters, 2013, 11(12): 120603.