Fibre raman amplifier properties for applications to long-distance optical communications

Aoki, Yasuhiro

doi:10.1007/bf02117685

Cited by 21 publications

(5 citation statements)

References 45 publications

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“…At first, the pumps transmit from the end point to the starting point of fiber without depletion due to signals but with attenuation and depletion due to pump interaction. Then the attenuated pumps transmit together with signals to the end point according to (2) and transfer power to signal 12] . In this paper, Simulated annealing algorithm is adopted to give automatic pump power configuration in multiwave backward-pumped dispersion compensation FRA.…”

Section: Theory Model and Design Methodsmentioning

confidence: 99%

“…Development in transmission fiber now provides an applicable low-loss window from 1.2-1.7µm, but no suitable rare earth-doped fiber amplifiers have been developed which can continuously cover this practically 70Thz range [1] .Distributed Fiber Raman Amplifier using the transmission line as a Raman gain medium is a promising technology available for the long haul communication systems [2][3] . Now high-power fiber lasers that can satisfy the demand of the high-pumps for FRA have become commercially available, and fiber Raman amplifiers are recently attracting much attention due to wider amplification bandwidth, flexible center wavelength, and low noise performance [4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

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Optimal design and experimental research of multiwave-pumped dispersion compensation distributed fiber Raman amplifier (FRA)

Geng

Zhang

2005

SPIE Proceedings

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5kmDCF-50kmG652 fiber dispersion compensation FRA pumped by three-wavelength Raman fiber laser has been researched. Dispersion and dispersion slope can be compensated in the dispersion compensation FRA simultaneously.Cascaded pump fiber laser is an all fiber technology, and high output power above 3W can be achieved. The Raman fiber lasers which operating at wavelengths of 1428,1455 and 1466nm have been used to simultaneously pump dispersion compensation fiber Raman amplifier. Simulated annealing algorithm is adopted to give automatic pump power configuration in multiwave backward-pumped dispersion compensation FRA. Simulated annealing algorithm imitates physical annealing process in order to seek the most optimal key. We studied the dispersion compensation FRA with the pump power configuration of optimal design in experiment, and the spectrums of gain and noise figure (NF) have been measured. When pump power is 1250mw and signal power is 0dBm,we get 55nm flat-gain bandwidth, and noise figure is less than -0.93dB, while the gain flatness is less than 3dB and gain is more than 21.32dB;when pump power is 1500mw,we get 45nm flat-gain bandwidth, and noise figure is less than -1.79dB,while the gain flatness is less than 3dB and gain is more than 27.77dB.

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Section: Theory Model and Design Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal design and experimental research of multiwave-pumped dispersion compensation distributed fiber Raman amplifier (FRA)

Geng

Zhang

2005

SPIE Proceedings

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“…This is readily confirmed by substituting eqn (6) into a nonlinear relation (2). This substitution yields P(t) = x 0 E 0 cos mt + x 1 E 0 2 co.s 2 mt+ x 2 £ 0 3 cos 3 mt+ ... (8) which can be transformed to the format. P(t) = P 0 + P 1 cosmt + P 2 cos2mt+ P 3 cos3mt+ ... where P 0 = 112 x 0 E 0 2 P(t) = z 0 E 0 + 3/4 z 2 EQ 3 p2 = l/2 X1 Eo 2 P3 = l/4 X2 Eo 3 (9) (lOa)…”

Section: Second Order and Third Order Nonlinear Mediummentioning

confidence: 95%

Nonlinear Effects in Optical Fiber Transmission System

Tiwari

Prakash

Tripathi

et al. 1999

IETE Technical Review

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“…It has also been shown that the optical signal-to-noise ratio (OSNR) and transmission distance can be improved significantly by employing a remotely pumped EDF installed in a transmission span [10][11][12]. Furthermore, it has been shown theoretically that DRA or distributed optical amplification yields a higher OSNR than discrete amplification, which is realized by optical amplifiers such as EDFAs [13][14]. Then, a number of transmission experiments were undertaken using distributed EDFAs [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Advanced transmission systems using distributed Raman amplification technologies

Masuda

2005

SPIE Proceedings

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This paper introduces practical and high-performance transmission systems that employ distributed Raman amplification (DRA) technologies. The systems incorporate DRA/EDFA hybrid amplifiers as inline amplifiers with limited DRA pump powers. These powers are determined with respect to the practical safety and reliability of the systems against intense pump light. The practical aspects and merits of our systems are described both in detail and qualitatively. It is shown that a hybrid amplifier system using DSF performs better than one using SMF with limited pump powers. The use of DRA means that the optical SNR of the former system is typically about 2-3 dB higher than that of the latter. Moreover, this paper reports successful results of long-haul transmission field trials using the hybrid amplifier scheme in the L-band over installed DSF with an aggregate capacity of 1.28 Tbit/s (32 x 43 Gbit/s).

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Fibre raman amplifier properties for applications to long-distance optical communications

Cited by 21 publications

References 45 publications

Optimal design and experimental research of multiwave-pumped dispersion compensation distributed fiber Raman amplifier (FRA)

Optimal design and experimental research of multiwave-pumped dispersion compensation distributed fiber Raman amplifier (FRA)

Nonlinear Effects in Optical Fiber Transmission System

Advanced transmission systems using distributed Raman amplification technologies

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