Investigation of the performance of L-band EDFAS with single forward pumping schemes
✍ Scribed by Tsair-Chun Liang; Hsi-Shan Huang
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 211 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
In this article, the authors investigate and compare the gain and noise figure of various 1480‐nm pumping erbium‐doped fiber amplifier configurations to amplify 32 digital wavelength division multiplexing channel signals operated in the long‐wavelength band of 1570–1610 nm. It was found that the two‐stage designs are better than one‐stage design to offer the higher output power and gain with moderate low noise figure in single forward pumping scheme. Especially, the two‐stage double‐pass configuration, Type A, provides gain enhancement more than about 5.4 dB without paying any noise penalty. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1259–1261, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22475
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## Abstract Large gain enhancement in a novel long‐wavelength band (L‐band) erbium‐doped fiber amplifier (EDFA) is demonstrated by the cascade of pumped and unpumped erbium‐doped fibers. By utilizing an injected conventional wavelength band (C‐band) laser as an auxiliary pump signal, an approximate
## Abstract L‐band gain improvement through amplified spontaneous emission (ASE) pumping was conducted. For an L‐band amplifier system employing ASE to improve gain, pumping the system counterdirectionally with ASE and codirectionally with 980 nm would yield the best overall performance in terms of
## Abstract The performances of gain and noise figure of an L‐band EDFA utilizing a ring laser cavity is demonstrated. It uses a fiber Bragg grating (FBG), arranged to propagate in opposition to the amplifier signal by a pair of circulators, to provide laser feedback. A flat‐gain spectrum with less
## Abstract A gain‐clamping technique in two‐stage double‐pass L‐band EDFA is demonstrated using a single fiber Bragg grating (FBG). Two types of FBGs, broadband and narrowband, have been used in the gain‐clamped system. The gain is clamped at 18.7 and 17.5 dB for the design with narrowband and bro