1 February 2001 Effects of signal seeding on long-wavelength-band Er3+-doped fiber amplifiers
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Optical Engineering, 40(2), (2001). doi:10.1117/1.1336528
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.
Mohd Adzir Mahdi, F. R. Mahamd Adikan, P. Poopalan, S. Selvakennedy, Harith B. Ahmad, "Effects of signal seeding on long-wavelength-band Er3+-doped fiber amplifiers," Optical Engineering 40(2), (1 February 2001). https://doi.org/10.1117/1.1336528
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