[OPTICAL REVIEW Vol. 7, No. 4 (2000) 277-280]

Simultaneous Double-Color Continuous Wave Raman Fiber Laser at 1239 nm and 1484 nm Using Phosphosilicate Fiber

Mahendra PRABHU, Nam Seong KIM* and Ken-ichi UEDA

Institute for Laser Science, University of Electro-Communications, 1 5-1 Chofugaoka, Chofu, Tokyo, 182-8585 Japan

(Received February 5, 2000; Accepted March 27, 2000)

Simultaneous double-color high-power continuous wave (CW) Raman fiber laser at 1239 nm and 1484 nm is demonstrated which uses CW 8.4 W Yb-doped double-clad fiber laser at 1064 nm as a pump, 1 km phosphosilicate fiber, and cascaded cavities consisting of two pairs of fiber Bragg grating (FBG) mirrors. Maximum output powers are 0.65 W at 1239 nm and 0.97 W at 1484 nm with a 50%/50% output mirror reflectivity pair, and 0.37 W at 1239 nm and 1.06 W at 1484 nm with a 75.5%/50% pair. The output characteristics of this laser for different FBG mirror reflectivities are reported.

Key words : Raman fiber laser, phosphosilicate fiber, stimulated Raman scattering, Raman fiber amplifiers, optical fiber communications, optical amplifiers