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Optical Engineering

Effects of signal seeding on long-wavelength-band Er3+-doped fiber amplifiers
Author(s): Mohd Adzir Mahdi; F. R. Mahamd Adikan; P. Poopalan; S. Selvakennedy; Harith B. Ahmad
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Paper Abstract

A study of gain improvement in the long-wavelength band (L-band) by a seeding signal from the conventional-wavelength band (C-band) is presented. The seeding signal reduces losses through amplified spontaneous emission and supplies energy for L-band amplification in the underpumped region. Gain improvement is observed for a copumped configuration, where the L-band and seeding signal are colaunched together with minimal noise figure penalty when an optimized seeding signal is used. The seeding signal boosts the L-band gain profile in the underpumped region to the flat-gain profile with gain flatness of less than 1 dB. High flat-gain values of 24 dB with gain variation of less than 0.9 dB when a seeding signal at 1555 nm is applied to the L-band amplifier pumped by only 105 mW from a 980 nm pump laser. A gain improvement of 52 dB is obtained at 1580 nm with this architecture.

Paper Details

Date Published: 1 February 2001
PDF: 7 pages
Opt. Eng. 40(2) doi: 10.1117/1.1336528
Published in: Optical Engineering Volume 40, Issue 2
Show Author Affiliations
Mohd Adzir Mahdi, Univ. of Malaysia (Malaysia)
F. R. Mahamd Adikan, University of Malaysia (Malaysia)
P. Poopalan, University of Malaysia (Malaysia)
S. Selvakennedy, University of Malaysia (Malaysia)
Harith B. Ahmad, Telekom Malaysia Photonics Research Ctr. (Malaysia)

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