SPECTRUM-SLICED FIBER AMPLIFIER LIGHT-SOURCE FOR MULTICHANNEL WDM APPLICATIONS

被引:230
作者
LEE, JS [1 ]
CHUNG, YC [1 ]
DIGIOVANNI, DJ [1 ]
机构
[1] AT&T BELL LABS,MURRAY HILL,NJ 07974
关键词
D O I
10.1109/68.262573
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We propose a potentially inexpensive light source for multichannel WDM applications. The high-power amplified spontaneous emission (ASE) from an erbium-doped fiber amplifier (EDFA), which is already in the single-mode fiber, can be efficiently divided into many channels by using an integrated optic WDM demultiplexer. This ''spectrum-sliced'' ASE can be used as light sources for WDM systems rather than several wavelength-selected DFB lasers. To demonstrate the principle, we sliced a 40-nm wide ASE spectrum of an EDFA with a narrow optical filter (3 dB bandwidth: 1.3 nm) and used the resulting source for the transmission of up to 1.7 Gb/s of data. These incoherent light sources suffer from the spontaneous-spontaneous beat noise. Thus, it is necessary to increase the optical bandwidth and/or decrease the electrical bandwidth (bit rate) to improve the signal-to-noise ratio, which, in turn, determines the transmission capacity of a WDM system using the proposed light source. We estimate that the total capacity would be about 40 Gb/s, realistically, since the channel spacing should be at least three times the optical bandwidth of each channel to avoid crosstalk.
引用
收藏
页码:1458 / 1461
页数:4
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