A new method to equalize power imbalance caused by Raman-induced crosstalk among optical channels is proposed using a lumped germanosilicate fiber Raman amplifier. Evolution of optical channels through the Raman amplifier was simulated using Raman frequency modeling, which theoretically predicted simultaneous amplification and power equalization. Experimentally, a gain band with negative slope in the range of 1.571-1.591 μm was achieved in a lumped Raman amplifier pumped by a broad-band laser diode centered at 1.467 μm. We demonstrated compensation of the Raman-induced crosstalk of 5 dB accumulated along 330 km of conventional single-mode fiber.
Bibliographical noteFunding Information:
Manuscript received August 14, 2000. This work was supported in part by UFON, an ERC program sponsored by KOSEF, by the BK21 program, and by MOE in Korea. The authors are with the Department of Information and Communications, Kwangju Institute of Science and Technology, Puk-gu Kwangju, 500-712, South Korea (e-mail: firstname.lastname@example.org). Publisher Item Identifier S 1041-1135(01)00512-2.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering