Gain clamped L-band EDFA using a fiber Bragg grating in two stage configuration
A gain clamping technique for the long-wavelength-band erbium-doped fiber amplifier (L-band EDFA) is presented. If uses two circulators and a fiber Bragg grating (FBG) to route a backward amplified spontaneous emission (ASE) from a second-stage amplifier and launch it back into the first stage. The...
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| Main Authors: | , , |
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| Format: | Article |
| Published: |
John Wiley & Sons
2003
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/19637/ http://dx.doi.org/10.1002/mop.10889 |
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| Institution: | Universiti Malaya |
| Summary: | A gain clamping technique for the long-wavelength-band erbium-doped fiber amplifier (L-band EDFA) is presented. If uses two circulators and a fiber Bragg grating (FBG) to route a backward amplified spontaneous emission (ASE) from a second-stage amplifier and launch it back into the first stage. The use of a broadband (BB) FBG has shown a better gain clamping effect, compared to a narrowband (NB) FBG. The amplifier gain for the BB FBG set up is clamped at 15.0 dB with a gain variation of less than 0.1 dB for an input power as high as -5 dBm. The use of a BB FBG has also flattened the gain spectrum. |
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