Compensation scheme for flattening coded wavelength-division multiplexing chip spectra with backward-pumped fiber Raman amplifiers

Jen-Fa Huan, Chih Ta Yen, Chih Wei Tsai

Research output: Contribution to journalArticle

Abstract

An optical spectral compensation scheme is proposed to flatten the chips spectra over an arrayed-waveguide grating (AWG), router-based code-division multiplexing (CDM) network. Spectral coding chips are attained by slicing the spectrum from a broadband light source (BLS) and then coded with an AWG router to form a stream of spectral chips. The chips spectra sliced from the contemporary BLS are usually not flat and will induce coding chips with unequal power levels. The resulting unequal chips power will cause multiple-access interference (MAI) at the receiver. Chips spectra compensation is therefore examined with backward-pumped fiber Raman amplifiers (FRAs). The study adopts a genetic algorithm (GA) and linear matrix to flatten the power spectra of coded wavelength-division multiplexing (coded-WDM) chips by identifying the optimal pump wavelengths and pump power of backward-pumped FRAs. The signal-to-interference ratio (SIR) is evaluated with spectral compensation, and the performance improvement is found to be in the range of ∼20 dB.

Original languageEnglish
Article number105005
JournalOptical Engineering
Volume46
Issue number10
DOIs
Publication statusPublished - 2007 Oct 1

Fingerprint

flattening
wavelength division multiplexing
Wavelength division multiplexing
Arrayed waveguide gratings
amplifiers
chips
Routers
fibers
Light sources
Fibers
Pumps
Multiple access interference
Power spectrum
Multiplexing
Genetic algorithms
Wavelength
light sources
coding
code division multiplexing
gratings

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)

Cite this

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abstract = "An optical spectral compensation scheme is proposed to flatten the chips spectra over an arrayed-waveguide grating (AWG), router-based code-division multiplexing (CDM) network. Spectral coding chips are attained by slicing the spectrum from a broadband light source (BLS) and then coded with an AWG router to form a stream of spectral chips. The chips spectra sliced from the contemporary BLS are usually not flat and will induce coding chips with unequal power levels. The resulting unequal chips power will cause multiple-access interference (MAI) at the receiver. Chips spectra compensation is therefore examined with backward-pumped fiber Raman amplifiers (FRAs). The study adopts a genetic algorithm (GA) and linear matrix to flatten the power spectra of coded wavelength-division multiplexing (coded-WDM) chips by identifying the optimal pump wavelengths and pump power of backward-pumped FRAs. The signal-to-interference ratio (SIR) is evaluated with spectral compensation, and the performance improvement is found to be in the range of ∼20 dB.",
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Compensation scheme for flattening coded wavelength-division multiplexing chip spectra with backward-pumped fiber Raman amplifiers. / Huan, Jen-Fa; Yen, Chih Ta; Tsai, Chih Wei.

In: Optical Engineering, Vol. 46, No. 10, 105005, 01.10.2007.

Research output: Contribution to journalArticle

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