Experimentally Verified Modelling of Parametric Amplification and Wavelength Conversion in Optical F

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Experimentally Verified Modelling of Parametric
Amplification and Wavelength Conversion in
Optical Fibres

• Jirí Kanka,
• Miroslav KARÁSEK,
• Jan Radil
• Josef Vojtech
• simulations
• experiments

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Parametric Amplification and Wavelength
Conversion in HNLF

• third- order parametric processes involve
  non-linear interactions among 4 optical waves and
  include 3rd harmonic generation, FWM and
  parametric amplification
• 3rd - order non-linear polarization
  PNLe0?(3)EEE
• ?(3). tensor of 3rd order susceptibility
• significant FWM occurs only if the phase
  mismatch T(k1k2-k3-k4)z-(?1 ?2- ?3- ?4)t
  vanishes, or when ?kk3k4-k1-k2 (n3?3n4?4-
  n1?1- n2?2)/c0

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Parametric Amplification and Wavelength
Conversion in HNLF
strong pumps
amplitude
signal
idler
?123
?132
?231
?321
?331
?221
?1
?321
?3
?2
?223
?112
?332
?113
frequency
?331
?112
?113
?231
?221
?223
?332
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Parametric Amplification and Wavelength
Conversion in Optical Fibres
RFG1
RFG2
DEMUX
?p1
OBPF
(?p1 ?p2)/2
HNLF
PC
OSC
95
EDFA
90
phase modul.
PC
?p2
10
1
?s
OSA
5
PM
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Parametric Amplification and Wavelength
Conversion in HNLF simulations

• Parametric amplification and single wavelength
  conversion have been simulated by numerical
  solution of coupled-wave equations
• For numerical simulations of Multiple Wavelength
  Conversion we have used commercial packages,
  OptSim 3.5 (ARTIS) and OptiSystem 4.0 (Optiwave)

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Parametric Amplification and Wavelength
Conversion in HNLFsimulations
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Parametric Amplification and Wavelength
Conversion in HNLFsimulations
parametric conversion gain
signal gain
effect of pump power
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Parametric Amplification and Wavelength
Conversion in HNLFsimulations
effect of pump wavelength off-set from zero
dispersion wavelength
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Parametric Amplification and Wavelength
Conversion in HNLFsimulations
effect of signal power on spectral dependence
of gain
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Parametric Amplification and Wavelength
Conversion in HNLFsimulations
SPM split of pumps
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Parametric Amplification and Wavelength
Conversion in HNLFsimulation
parametric amplified spontaneous emission effect
of pump power
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Parametric Amplification and Wavelength
Conversion in HNLF experiment

• 3 spools of HNLF, ?01532nm, 1546nm, 1560nm, and
  1560nm, length 500m, 500m, 1000m, and 1500m,
  D0.019-0.021ps/(nm2km), ?10.5 W-1 km-1
• 2 RF generators Agilent HP E8257D and E4436B
• RF power combiners and RF amplifier,
  Mini-Circuits ZFSC-2-2500, ZHL-42W
• Oscilloscope Infinniun 86100C
• 10 Gbit/s multipurpose platform Cisco 15454
• Pump seeds LC25W WDM LDs
• EDFA Keopsys

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Parametric Amplification and Wavelength
Conversion in HNLFexperiment
amplification of 4 WDM channels 31 - 34
pump
signals
idlers
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Parametric Amplification and Wavelength
Conversion in HNLFexperiment
amplification of 4 WDM channels 35 - 38
pump
signals
idlers
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Parametric Amplification and Wavelength
Conversion in HNLFexperiment
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Parametric Amplification and Wavelength
Conversion in HNLFexperiment
signal 35 (1549.32nm)
copy 37 (1547.72nm)
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Parametric Amplification and Wavelength
Conversion in HNLFexperiment
Copy 33 (1550.92 nm)
copy 31 (1552.52nm)
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Parametric Amplification and Wavelength
Conversion in HNLFexperiment
parametric amplified spontaneous emission effect
of pump power

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Parametric Amplification and Wavelength
Conversion in HNLFexperiment

signal in anomalous dispersion region
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Parametric Amplification and Wavelength
Conversion in HNLF Conclusions

• We have verified that simulation results based on
  numerical solution of coupled-wave equations and
  commercial simulation packages are in qualitative
  agreement with experiments of parametric
  amplification and wavelength conversion in HNL
  fibres
• Problems to be solved
• suppression of SBS
• ASE elimination