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High gain Er 3+ ‐doped fiber amplifier with double‐pass preamplification stage
Author(s) -
Bouzid Belloui,
Abdullah M. K.,
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.21501
Subject(s) - amplifier , amplified spontaneous emission , optical amplifier , noise figure , signal (programming language) , optoelectronics , band pass filter , materials science , optics , direct coupled amplifier , wavelength , physics , operational amplifier , computer science , cmos , laser , programming language
A new architecture of dual‐stage erbium‐doped fiber amplifier with double‐pass preamplification is successfully demonstrated. A maximum gain of 52 dB is obtained at −50‐dBm signal power with 1550‐nm signal wavelength. An efficient filtering of amplified spontaneous emission improves gain at the signal wavelength up to 18 dB in the double‐pass amplifier section. The noise‐figure penalty is very minimal in the small‐signal range, compared to the dual‐stage amplifier without bandpass filters. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 866–868, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21501