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A single frequency narrow linewidth fiber laser based on quasi‐π‐phase‐shifted grating
Author(s) -
She L. J.,
Zhang D. T.,
Wang X. L.,
Chen D. R.
Publication year - 2018
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31032
Subject(s) - laser linewidth , fiber bragg grating , materials science , optics , fiber laser , lasing threshold , optoelectronics , grating , dispersion shifted fiber , laser , phosfos , polarization maintaining optical fiber , long period fiber grating , distributed feedback laser , slope efficiency , optical fiber , fiber optic sensor , wavelength , physics
We propose and demonstrate a single frequency narrow linewidth fiber laser composed of the quasi‐π‐phase‐shifted grating (QπPSG) with a short line cavity and a structure of distributed feedback. On the high‐precision displacement platform, quasi‐π phase shift is introduced between two uniform fiber Bragg gratings based on a high‐concentration Erbium‐doped fiber (EDF) by ultraviolet exposure. Coupling the 980 nm pumped light to the QπPSG, the obtained laser is further amplified using a section of low‐concentration EDF. The single frequency lasing is achieved with a central wavelength of 1550.5 nm, and a slope efficiency of about 5.7%.
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