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Gain‐clamped Raman fiber amplifier in a counter‐lasing ring‐cavity using a pair of circulators
Author(s) -
Ahmad A.,
Md Ali M. I.,
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.21455
Subject(s) - lasing threshold , circulator , noise figure , optical amplifier , materials science , optics , optoelectronics , noise (video) , laser diode , active laser medium , relative intensity noise , laser , amplifier , diode , wavelength , physics , semiconductor laser theory , laser power scaling , computer science , cmos , artificial intelligence , image (mathematics)
An all‐optical gain‐clamped Raman fiber amplifier (RFA) based on the ring‐lasing technique using a pair of circulators is demonstrated experimentally. The RFA is powered using a pair of 1465‐nm pump laser diodes, which provide a peak gain at around 1565 nm. The analyses of the gain and the noise figure are carried out using different lasing wavelengths between 1550 and 1565 nm. The gain and noise figure variations are 0.4 and 0.5 dB in the gain‐clamping range, respectively. We observe a strong influence of pump‐signal relative‐intensity noise transfer, which results in a noise‐figure penalty at the signal. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 721–724, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21455