Long-wavelength erbium-doped fiber amplifier gain enhanced by ASE end-reflectors

We use for what we believe is the first time narrow-band end-reflectors to reduce losses through short-wavelength amplified stimulated emission (ASE) in silica-based erbium-doped fiber amplifiers operating at wavelengths above 1570 mm. The end-reflectors feed a small fraction of the ASE, up to a few...

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Bibliographic Details
Published in:IEEE photonics technology letters 1998-11, Vol.10 (11), p.1551-1553
Main Authors: Nilsson, J., Yun, S.Y., Hwang, S.T., Kim, J.M., Kim, S.J.
Format: Article
Language:English
Subjects:
Absorption
Business communication
Erbium-doped fiber amplifier
Optical fiber amplifiers
Optical fiber communication
Optical fibers
Power amplifiers
Power generation
Research and development
Wavelength division multiplexing
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Summary:We use for what we believe is the first time narrow-band end-reflectors to reduce losses through short-wavelength amplified stimulated emission (ASE) in silica-based erbium-doped fiber amplifiers operating at wavelengths above 1570 mm. The end-reflectors feed a small fraction of the ASE, up to a few tenths of a milliwatt, back into the amplifying fiber. The reflected ASE compresses the short-wavelength gain and thus reduces the ASE-losses, from, e,g., 50 mW for a launched pump power of 110 mW at 980 nm without end-reflector to 10 mW with an optimized end-reflector. We investigate possible improvements of gain (around 5 dB) and output power (up to 17 mW), and the influence of the amount and wavelength of the feedback.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.726746