共查询到20条相似文献,搜索用时 265 毫秒
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IEEE会员Makoto Yamada等人成功地开发出氟化物掺饵光纤放大器。各信道的输入信号功率为-20dBm时,8信道波分多路复用信号在1532-1560nm波长范围的平均增益达26dB,增益偏移低于1.5dB。。此外,MakotoYamada等人在本文中研究了F-EDFA对WDM信号的放大性能。 相似文献
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建立了掺铒光纤放大器(EDFA)双向放大传输的方程,通过数值模拟计算,分析了掺铒光纤长度、泵浦功率的变化对增益、噪声系数的影响;研究了EDFA的正反向增益和噪声系数特性;给出了增益、正反向系数与输入信号功率的关系曲面。 相似文献
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掺铒光纤放大器噪声特性的全面分析 总被引:2,自引:1,他引:1
本文对掺铒光纤放大器(EDFA)的噪声特性进行了全面的分析。把光信号和EDFA中放大自发辐射(ASE)产生的量子噪声,以及信号-ASE拍频噪声和ASE-ASE拍频噪声一并加以考虑。通过数值模拟,给出了不同信号功率和泵浦功率下的EDFA噪声系数。这些结果对优化EDFA的工作参量及其工程制作具有一定的指导作用。 相似文献
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光纤放大器是光纤传输系统的关键部件之一,它的应用对光纤通信系统产生了巨大的影响,引起了光纤通信领域中一场新的变革。目前光放大器主要有掺稀土元素光纤放大器、受激拉曼散射(SRS)和受激布里渊散射(SBS)光纤放大器及半导体光纤放大器三种类型。其中以1550nm的掺铒光纤放大器(EDFA)最为成熟。1 掺铒光纤放大器的工作原理1.1 掺铒光纤放大器的基本模型EDFA的基本模型如图1所示,EDFA的组成分光路部分和电路部分。光路部分包括掺铒光纤(EDF)、泵浦光源、光隔离器、光合波器(WDM)、光耦合器;电路部分包括微处理… 相似文献
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High-gain mode-adapted semiconductor optical amplifier with12.4-dBm saturation output power at 1550 nm 总被引:1,自引:0,他引:1
Dreyer K. Joyner C.H. Pleumeekers J.L. Burrus C.A. Dentai A. Miller B.I. Shunk S. Sciortino P. Chandrasekhar S. Buhl L. Storz F. Farwell M. 《Lightwave Technology, Journal of》2002,20(4):718-721
A mode-adapted semiconductor optical amplifier (SOA) has been fabricated and packaged. At the gain peak, 1500 nm, the fiber to fiber gain was measured to be 32.5 dB. Statistics for eight packaged devices indicate that a fiber-to-fiber gain of 26.3 dB ± 1.3 dB and a saturation output power of 12.4 dBm ± 0.4 dBm are typical at a bias of 500 mA for λ = 1550 nm. Polarization sensitivity at 1550 nm was measured to be 1.1 dB ± 0.4 dB and the transverse electric (TE) polarization state noise figure (NF) was determined to be 7.0 dB ± 0.5 dB. The coupling loss was 1.3 dB ± 0.1 dB per facet. This SOA, with a 1.3-nm filter, was used as an optical preamplifier in a 10-Gb/s return-to-zero (RZ) system testbed with a pseudorandom binary sequence (PRBS) of 231 -1. A 14.5-dB improvement in receiver sensitivity was observed at a bit error rate (BER) of 10-11 相似文献
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The impact of altering the fiber length and pump wavelength on the gain and noise performance of erbium-doped fiber power amplifiers pumped in the 980-nm band is examined. A gain penalty of <0.5 dB was experimentally observed over an 18 nm pump wavelength range. Theoretical analysis indicates that increasing the numerical aperture (NA) from 0.15 to 0.25 significantly improves the tolerance for a given gain penalty but has little effect on the noise figure. For a given fiber length, the noise figure increases by 0.1 dB for each 3 nm the pump wavelength deviates from 979 nm 相似文献
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Seongtaek Hwang Kwan-Woong Song Hyung-Jin Kwon Junho Koh Yun-Je Oh Kyuman Cho 《Photonics Technology Letters, IEEE》2001,13(12):1289-1291
We demonstrate a broad-band silica-based erbium-doped fiber amplifier (EDFA) with double-pass configuration. The signal gain and noise figure are obtained more than 24 dB and less than 6 dB, respectively, for 1526-1562 nm and 1569-1605 nm. The same signal gain can be achieved with 53% less pump power and 45% shorter erbium-doped fiber length, compared to a conventional parallel type EDFA. Furthermore, the noise figure and power conversion efficiency are improved for the wavelength range 相似文献
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Hu Y. Jiang S. Luo T. Seneschal K. Morrell M. Smektala F. Honkanen S. Lucas J. Peyghambarian N. 《Photonics Technology Letters, IEEE》2001,13(7):657-659
Performance of high-concentration Er3+-Yb3+-codoped phosphate fiber amplifiers in a copumping configuration is presented. Gain, noise figure, and output signal saturation power of fiber amplifiers with different lengths are reported. From a 3.6-cm-long fiber, 18-dB internal gain, i.e., 5 dB/cm, for small signal input at 1535 nm, was achieved. To the best of our knowledge, this is the highest gain per unit length for erbium-doped fiber amplifiers ever reported 相似文献
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Jyi-Lai Shen Hau-Min Huang Yueh-Chien Lee Chia-Chih Huang Huang-Cuang Lin Chin-Yuan Lin 《Journal of Infrared, Millimeter and Terahertz Waves》2009,30(1):44-50
To form a low noise figure and uniform shortpass band in optical fiber communications an improved automatic filtered power
control (AFPC) pumping method is proposed here. A modulated single laser signal was entered in a closed feedback loop, in
which the erbium-doped fiber amplifier (EDFA) was used as a part of the AFPC loop. Owing to the constant filtered signal and
the quadrature phase shift delay inside the feedback loop, an optical pass band was uniformly formed. This EDFA attains high
performance with a low noise figure simultaneously. The method was successfully applied to the fabrication of practical 12.0
m length of erbium-doped fiber pumped at 980 nm wavelength and 20 dBm power. Experiments prove that the signal gain of the
loop remain flat in the range of 18.2 to 22.4 dB with a worst case error of ±0.5 dB and the noise figure was reduced by 2.2
dB at optimal, which correspond to a shortpass range of 40 nm band pass from 1525 nm to 1565 nm in wavelength. Of course,
it should be possible to extent the system performance to all pumping configurations for semiconductor optical amplifiers.
This provides the simplest and most economical way to transmit a well-defined band of modulated laser signal and to reject
all other unwanted radiation. 相似文献
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提出并论证了一种新的低噪声系数C+L波段掺铒光纤放大器的结构.在该结构中,利用一个前置放大器以减少噪声系数,并利用一个带有光纤布拉格光栅的双通结构以增加L波段增益,同时减少噪声系数.实验结果表明,新宽带放大器的噪声系数减小了约2 dB,并且在1 525~1 605 nm波长范围内,增益提高到了25 dB以上. 相似文献
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Mori A. Sakamoto T. Shikano K. Kobayashi K. Hoshino K. Shimizu M. 《Electronics letters》2000,36(7):621-622
A gain-flattened Er3+-doped tellurite fibre amplifier (EDTFA) with an expanded L-band is presented. The amplifier has an average gain of 28 dB and a noise figure of <6 dB with a slight gain excursion of 1 dB over a wide wavelength range of 1581-1616 nm. The total output power of the EDTFA module was 20.5 dBm and its power conversion efficiency reached 25% 相似文献
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Smart R.G. Zyskind J.L. Sulhoff J.W. DiGiovanni D.J. 《Photonics Technology Letters, IEEE》1993,5(5):523-525
The effect of pump wavelength around 1480 nm on the performance of saturated erbium-doped fiber amplifiers (EDFAs) suitable for use as in-line amplifiers for terrestrial and submarine systems is investigated experimentally. The results show that for high-gain amplifiers (25 dB) with high output powers (15 dBm), operating around 10 dB in compression, the performance is relatively insensitive to pump wavelength. However, for lower gain amplifiers (12 dB), pumped at low (15 mW) powers, the compression of the amplifier is found to decrease significantly with increasing pump wavelength, while the noise figure shows a weak minimum for a pump wavelength near 1480 nm 相似文献
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《Electronics letters》2002,38(10):447-448
A thulium-doped fibre amplifier with a new 1055 nm diode pumping configuration has been constructed. A small signal gain larger than 20 dB in the 1455 to 1480 nm region and a noise figure of less than 6.5 dB was obtained 相似文献