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- W2051249551 abstract "The high density wavelength division multiplexing (HD-WDM) system presented here has 8 channels in 1.55 micrometers optical band with wavelength spacing of 100 GHz. Each channel operates at 622 Mb/s by using directly modulated DFB-LD. Accurate temperature control and current control methods have been taken to ensure the wavelength stability of 200 MHz in standard deviation. Three high-quality EDFA's are used in the 420 km optical fiber transmission to compensate the loss of fiber, star couplers and F-P optical filter. An F-P filter with 0.3 nm bandwidth and 1.2 dB insertion loss is used as a demultiplexer in front of the receiver to select every channel and reduce amplified spontaneous emission noise. An optical receiver with PIN-FET front-end has been used, which has sensitivity of -31 dBm BER equals 10<SUP>-10</SUP>. Good SNR characteristic is obtained for all channels after the transmission. In this paper we describe an 8 X 622 Mb/s HD-WDM experiment system and its 420 km optical fiber transmission. Some critical problems in long distance HD-WDM transmission also have been studied in this paper." @default.
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- W2051249551 date "1996-09-20" @default.
- W2051249551 modified "2023-09-23" @default.
- W2051249551 title "<title>8x622Mb/s HD-WDM optical fiber transmission over 420 km</title>" @default.
- W2051249551 doi "https://doi.org/10.1117/12.252059" @default.
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