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- Title
Effect of Injection of C-band ASE on L-band Erbium-Doped Fiber Amplifier.
- Authors
Harun, S. W.; Tamchek, N.; Poopalan, P.; Ahmad, H.
- Abstract
The effect of injecting conventional band (C-band) amplified spontaneous emission on the performance of long-wavelength band erbium-doped fiber amplifier (L-band EDFA) is demonstrated. It uses a circulator and broadband fiber Bragg grating (FBG) to route C-band ASE from a C-band EDFA. Injection of a small amount of ASE (attenuation of 20 dB or above) improves the small signal gain with a negligible noise figure penalty compared to that of an amplifier without the ASE injection. A maximum gain improvement of 3.5 dB is obtained at an attenuation of 20 dB. At very large amounts of ASE injection (attenuation of 0 dB), the gain of the amplifier is clamped at 15.2 dB from -40 to -10 dBm with a gain variation of less than 0.3 dB. The saturation power is also increased from -8 dBm (for without ASE injection) to 2 dBm (VOA = 0 dB) with a slight noise figure penalty. These results show that the ASE injection technique can be used either for gain improvement or for gain clamping in L-band EDFA.(c) 2003 MAIK "Nauka/Interperiodica".
- Subjects
ELECTRONIC amplifiers; OPTICAL fibers; ERBIUM
- Publication
JETP Letters, 2003, Vol 77, Issue 9, p461
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.1591969