High Power EDFA Research Articles

Research of multiple wavelength light source based on super-continuous spectrum

In order to meet the requirements of the multi-wavelength light source of large-capacity, high-speed, long-distance optical communication system, we researched the multi-wavelength light source based on super-continuum (SC), analyzed the main factors in the SC generation, such as dispersion, nonlinear effects. The SC simulation and optimization around the input pulse width, peak power, fiber length, non-linear coefficient parameters for analysis. The optimized results: SC input achieved 25GHz repetition rate, amplified by high power EDFA, input average power did not exceed 33dBm. The output of the SC 3dB bandwidth was greater than 70nm, after AWG, output 320 wavelengths, wavelength spacing is 0.2nm (25GHz), the signal-to-noise ratio was greater than 30dB.

Influence of bidirectional pumping in high-power EDFA on single-channel, multichannel and pulsed signal amplification

A detailed analysis in terms of computational and experimental results of a high power erbium doped fibre amplifier using the bidirectional pumping scheme is presented. The differences between the signal evolution are discussed for unidirectionally and bidirectionally pumped amplifier for a single channel CW input. A comparison is made between the theoretically predicted gain and the experimental results for bidirectional pumping. The numerical analysis is further extended to multiwavelength propagation in the forward and bidirectional pumping schemes. In the case of a pulsed input, enhanced nonlinearity of the doped fibre and the differences in gain evolution between the different pumping schemes result in drastic changes in the pulse quality during its propagation through the amplifier fibre. The modifications of a Gaussian pulse in the time and spectral domains due to propagation through the doped fibre are analysed qualitatively to emphasise the advantages of bidirectional pumping for high power amplification.

Erratum: Analysis of high‐power EDFA operating in saturated regime at λ = 1530 nm and its performance evaluation in DWDM systems

Microwave and Optical Technology LettersVolume 34, Issue 5 p. 399-399 Free Access Erratum: Analysis of high-power EDFA operating in saturated regime at λ = 1530 nm and its performance evaluation in DWDM systems J. Ravikanth, J. Ravikanth Department of Physics, Indian Institute of Technology, Bombay, Powai, Mumbai 400 076, IndiaSearch for more papers by this authorD. D. Shah, D. D. Shah Department of Electrical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai-400 076, IndiaSearch for more papers by this authorR. Vijaya, R. Vijaya Department of Physics, Indian Institute of Technology, Bombay, Powai, Mumbai 400 076, IndiaSearch for more papers by this authorBhanu P. Singh, Bhanu P. Singh Department of Physics, Indian Institute of Technology, Bombay, Powai, Mumbai 400 076, IndiaSearch for more papers by this authorR. K. Shevgaonkar, R. K. Shevgaonkar Department of Electrical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai-400 076, IndiaSearch for more papers by this author J. Ravikanth, J. Ravikanth Department of Physics, Indian Institute of Technology, Bombay, Powai, Mumbai 400 076, IndiaSearch for more papers by this authorD. D. Shah, D. D. Shah Department of Electrical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai-400 076, IndiaSearch for more papers by this authorR. Vijaya, R. Vijaya Department of Physics, Indian Institute of Technology, Bombay, Powai, Mumbai 400 076, IndiaSearch for more papers by this authorBhanu P. Singh, Bhanu P. Singh Department of Physics, Indian Institute of Technology, Bombay, Powai, Mumbai 400 076, IndiaSearch for more papers by this authorR. K. Shevgaonkar, R. K. Shevgaonkar Department of Electrical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai-400 076, IndiaSearch for more papers by this author First published: 22 July 2002 https://doi.org/10.1002/mop.10474Citations: 2AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article.Citing Literature Volume34, Issue55 September 2002Pages 399-399 ReferencesRelatedInformation

Analysis of high‐power EDFA operating in saturated regime at λ=1530 nm and its performance evaluation in DWDM systems

AbstractThis paper presents the numerical analysis of an EDFA operating in the saturation regime. Erbium‐doped silica fibers with higher numerical aperture and erbium ion concentration can yield high output signal powers. The study of multichannel signal amplification in a high‐power EDFA shows that the gain excursion in a particular channel lies within 0.5 dB as long as the number of channels dropped does not exceed a certain limit. © 2002 John Wiley & Sons, Inc. Microwave Opt Technol Lett 32: 64–70, 2002.

Generation of terabit per second optical data pulse train

This Letter reports the first successful generation of an optical data pulse stream at bit rates as high as 640 Gbit/s – 1.28 Tbit/s, achieved by using an optical time domain multiplexing technique from a 10 Gbit/s unit. The OTDM consists of a silica planar lightwave circuit with a seven-step Mach-Zehnder interferometer. The pulse width of the original data stream is as short as 220 fs. The average output powers at 640 Gbit/s and 1.28 Tbit/s through a high power EDFA are 170 and 300 mW, respectively.