Abstract

We propose a simple technique to optimize a multi-wavelength backward-pumped fiber Raman amplifier. Based on the geometric characteristics of Raman gain profile, we approximate it using several straight lines and utilize slope compensation technique to achieve flat and wideband gain profile. Good simulation results are obtained.

©2004 Optical Society of America

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References

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  1. X Zhou and C Lu, et al, “A simple model and optimal design of a multi-wavelength backward-pumped fiber Raman amplifier,” IEEE Photon. Technol. Lett. 13, 945–947 (2001).
    [Crossref]
  2. V. E. Perlin and H. G. Winful, “Optimal design of flat-gain wide-band fiber Raman amplifiers,” IEEE J. Lightwave Technol. 20, 250–254 (2002).
    [Crossref]
  3. Howard Kidorf and Karsten Rottitt, et al, “Pump interaction in a 100-nm bandwidth Raman amplifier,” IEEE Photon. Technol. Lett. 11, 530–533 (1999).
    [Crossref]

2002 (1)

V. E. Perlin and H. G. Winful, “Optimal design of flat-gain wide-band fiber Raman amplifiers,” IEEE J. Lightwave Technol. 20, 250–254 (2002).
[Crossref]

2001 (1)

X Zhou and C Lu, et al, “A simple model and optimal design of a multi-wavelength backward-pumped fiber Raman amplifier,” IEEE Photon. Technol. Lett. 13, 945–947 (2001).
[Crossref]

1999 (1)

Howard Kidorf and Karsten Rottitt, et al, “Pump interaction in a 100-nm bandwidth Raman amplifier,” IEEE Photon. Technol. Lett. 11, 530–533 (1999).
[Crossref]

Kidorf, Howard

Howard Kidorf and Karsten Rottitt, et al, “Pump interaction in a 100-nm bandwidth Raman amplifier,” IEEE Photon. Technol. Lett. 11, 530–533 (1999).
[Crossref]

Lu, C

X Zhou and C Lu, et al, “A simple model and optimal design of a multi-wavelength backward-pumped fiber Raman amplifier,” IEEE Photon. Technol. Lett. 13, 945–947 (2001).
[Crossref]

Perlin, V. E.

V. E. Perlin and H. G. Winful, “Optimal design of flat-gain wide-band fiber Raman amplifiers,” IEEE J. Lightwave Technol. 20, 250–254 (2002).
[Crossref]

Rottitt, Karsten

Howard Kidorf and Karsten Rottitt, et al, “Pump interaction in a 100-nm bandwidth Raman amplifier,” IEEE Photon. Technol. Lett. 11, 530–533 (1999).
[Crossref]

Winful, H. G.

V. E. Perlin and H. G. Winful, “Optimal design of flat-gain wide-band fiber Raman amplifiers,” IEEE J. Lightwave Technol. 20, 250–254 (2002).
[Crossref]

Zhou, X

X Zhou and C Lu, et al, “A simple model and optimal design of a multi-wavelength backward-pumped fiber Raman amplifier,” IEEE Photon. Technol. Lett. 13, 945–947 (2001).
[Crossref]

IEEE J. Lightwave Technol. (1)

V. E. Perlin and H. G. Winful, “Optimal design of flat-gain wide-band fiber Raman amplifiers,” IEEE J. Lightwave Technol. 20, 250–254 (2002).
[Crossref]

IEEE Photon. Technol. Lett. (2)

Howard Kidorf and Karsten Rottitt, et al, “Pump interaction in a 100-nm bandwidth Raman amplifier,” IEEE Photon. Technol. Lett. 11, 530–533 (1999).
[Crossref]

X Zhou and C Lu, et al, “A simple model and optimal design of a multi-wavelength backward-pumped fiber Raman amplifier,” IEEE Photon. Technol. Lett. 13, 945–947 (2001).
[Crossref]

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Figures (4)

Fig. 1.
Fig. 1. Asymptotic linear approximation of a typical Raman gain spectrum gR(Δυ) of a silica fiber at pump wavelength λ0=1µm

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Fig. 2.
Fig. 2. Schematic diagram of the geometric compensation scheme (i=2,3,4), with wavelength independent loss considered. S1, S2 and S3 show the partial gain spectral; Δf shows the target amplification band; υa1,1, υa21, υa31 and υa32 related to frequency allocation of gain spectra from individual pumps

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Fig. 3.
Fig. 3. Schematic diagram of the geometric compensation scheme (i=2,3,4), with wavelength dependent loss considered. Triangle: wavelength dependent loss of the fiber; Circle: individual gain spectral

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Fig. 4.
Fig. 4. example of a C-band Raman amplifier design

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Equations (7)

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G k = 10 ln ( 10 ) ( − α k L + ∑ j = n + 1 j ≠ k n + m g jk I j + ∑ j = 1 n g jk I j )
k = n + 1 , n + 2 , … n + m ; j = 1 , 2 , … n
I 1 = G ⁄ 10 log ( e ) + α L g ( ν a 1 , 2 )
I j = I 1 ( g ( ν a 1 , j + 1 ) − g ( ν a 1 , j + 2 ) ) ν a 1 , j + 1 − ν a 1 , j + 2 ν a j , 1 − ν a j , 2 g ( ν a j , 1 ) − g ( ν a j , 2 )
j = 2 … n
I j = I 1 ( g ( ν a 1 , j + 1 ) − g ( ν a 1 , j + 2 ) ) − ( α ( ν a 1 , j + 1 ) − α ( ν a 1 , j + 2 ) ) ν a 1 , j + 1 − ν a 1 , j + 2 ν a j , 1 − ν a j , 2 g ( ν a j , 1 ) − g ( ν a j , 2 )
j = 2 … n

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