1 February 2001 Effects of signal seeding on long-wavelength-band Er3+-doped fiber amplifiers
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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.
© (2001) Society of Photo-Optical Instrumentation Engineers (SPIE)
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 . Submission:

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