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Impact of the pump reflector in double‐pass discrete Raman amplifiers
Author(s) -
Md Ali M. I.,
Ahmad A.,
Zamzuri A. K.,
Mohamad R.,
Mahdi M. A.
Publication year - 2006
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.21473
Subject(s) - optics , reflector (photography) , raman scattering , materials science , amplifier , distributed bragg reflector , optical amplifier , grating , rayleigh scattering , optoelectronics , laser , raman spectroscopy , physics , light source , cmos
We present the experimental investigation of a counter‐pumped double‐pass discrete Raman amplifier with and without a pump reflector. The pump reflector is constructed with high‐reflectivity fiber Bragg grating. Gain improvement is obtained as a result of pump recycling, in comparison to the conventional double‐pass Raman amplifier. Noise‐figure degradation is found for large signals in the proposed Raman amplifier due to the enhanced double‐Rayleigh scattering and bidirectional pumping caused by the pump reflector. The impact of pump‐to‐signal relative intensity noise in the experimental work is minimized by utilizing Fabry–Perot pump lasers. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 777–779, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21473