High efficiency, dual-wavelength fibre Raman pump laser for U-band fibre Raman amplifiers |
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| Authors: | D.A. Chestnut C.J.S. De Matos P.C. Reeves-Hall J.R. Taylor |
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| Affiliation: | (1) Femtosecond Optics Group, Department of Physics, Imperial College of Science, Technology and Medicine, Prince Consort Road, London, SW7 2BW, UK |
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| Abstract: | A dual-wavelength, continuous wave, high efficiency fibre Raman ring laser for pumping U-band (1625–1675 nm) fibre Raman amplifiers is demonstrated. Two fibre Bragg gratings were used as wavelength-selective elements resulting in lasing lines at 1529.7 and 1558.7 nm with respective maximum powers of 209.0 and 390.9 mW. A simple U-band Raman amplifier was constructed to test the dual-wavelength pump laser and on:off gain with a peak of 7.3 dB and a 3-dB bandwidth of 73 nm was obtained. |
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| Keywords: | fibre fibre Bragg grating multi-wavelength Raman amplifier Raman laser U-band |
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