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Dual-Wavelength, Linearly Polarized All-Fiber Laser With High Extinction Ratio

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5 Author(s)
EL-Damak, A.R. ; Dept. of Electr. & Comput. Eng., Ryerson Univ., Toronto, ON, Canada ; Jianhua Chang ; Jian Sun ; Changqing Xu
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We demonstrate a dual-wavelength linearly polarized all-fiber laser emitting 1- μm and 1.5- μm wavelengths with a total output power of 1.3 W. The laser consists of two pairs of fiber Bragg gratings (FBGs) fabricated on PM fibers to form a cavity and an Er/Yb co-doped fiber as a gain medium. A high extinction ratio of 23 dB is achieved using specially designed PM FBGs. The laser output has a narrow bandwidth of 26 pm at both 1057 and 1554 nm. When the dual-wavelength all-fiber laser is used to pump a PPLN crystal, the generation of mid-infrared emission at 3.3 μm is successfully demonstrated.

Fiber Bragg Grating spectra at 1057 nm show the matching fast- and slow-axis wavelengths. Fiber Bragg Grating spectra at 1057 nm show the matching fast- and slow-axis wavelengths.

Published in:

Photonics Journal, IEEE  (Volume:5 ,  Issue: 4 )