Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

IEEE Lasers and Electro-Optics Society Annual Meeting (LEOS)

Evaluation of chromatic dispersion in erbium-doped fibers

D.S. Gasper, Paul F. Wysocki, William A. Reed, Ashish M. Vengsarkar

Published Dec 30, 2002• 2 citations
Publisher

Abstract

Transoceanic fiber optic systems that use erbium doped fiber amplifiers(EDFAs) require careful tailoring of chromatic dispersion along the length of the span. One of the parameters of interest to system designers is the additional chromatic dispersion introduced by the erbium ions in the EDFA. The effect of resonant chromatic dispersion due to erbium is also evident in the performance of short length fiber devices such as soliton lasers. Several methods have been used in the past to measure erbium-induced chromatic dispersion. Specifically, Fourier transform spectroscopy and the use of complex atomic susceptibility have been successfully demonstrated. In this paper, we evaluate the complex atomic susceptibility of these fibers with different dopant levels and derive the total dispersion (waveguide and material) of these fibers as a function of wavelength in the 1550 nm range.>

DOI
10.1109/leos.1993.379087

Related papers

Pump-induced dispersion of erbium-doped fiber measured by Fourier-transform spectroscopy

Robert K. Hickernell, K. Takada, Makoto Yamada +2 more

We report the measurement of group index and dispersion in an erbium-doped fiber amplifier by Fourier transformation of low-coherence interferograms. In a germania-codoped fiber whose background dispersion was - 14 ps/(km nm) we measured resonant gain-induced changes as high as 9 and -12 ps/(km nm) near 1.536 microm. The interferometric measurements agree with calculations based on a Kramers-Kronig transformation of absorption and emission spectra.

Optics Letters•Jan 1, 1993•25 citations

Self-induced transparency soliton propagation in an erbium-doped optical fiber waveguide

Masataka Nakazawa, Yasuo N. Kimura, Kazunori Suzuki +2 more

The recent development of the EDFA (erbium-doped fiber amplifier) offers the possibility for uses of the fibers to experiments on coherent pulse propagation such as self-induced transparency (SIT). The guiding of the radiation by the fiber structure eliminates diffraction effects and makes possible the interaction of the radiation with the fiber medium which has resonance effects over long distances. To date, however, experiments on SIT solitons have suffered from diffraction effects that were further complicated by nonlinear interactions. In the present paper, we report for the first time the observation of SIT soliton propagation in an erbium- doped resonant fiber waveguide.

Annual Meeting Optical Society of America•Jan 1, 1991•0 citations

Effects of concentration and clusters in EDFAs

Piotr Myslinski, Dan Trung Nguyen, Jacek Chrostowski

Strong interest in heavily doped erbium-doped waveguides1 and in the applications of heavily doped erbium-doped fibers (EDFs) in lasers has resulted in several recent studies of collective processes in erbium ions. Rapid cross relaxation within a fraction of clustered ions, called pair-induced quenching (PIQ), has been identified as the main cause of EDF performance degradation.2-4 To date, studies on the dependence of EDF performance on ion concentration have been focused on pair/cluster-induced nonsaturable absorption of EDFs,2 which leads to the reduced quantum efficiency (QE) of EDF lasers.4 Recently, detailed theoretical analysis of the effect of PIQ on the performance of erbium-doped fiber amplifiers (EDFAs) has also been reported.4

Optical Fiber Communication Conference•Jan 1, 1995•2 citations

Effects of concentration on the performance of erbium-doped fiber amplifiers

Piotr Myslinski, Dan Trung Nguyen, Jacek Chrostowski

The dependence of erbium-doped fiber amplifier (EDFA) performance on the erbium ion concentration is studied experimentally and theoretically. The quantum efficiency of the amplifier is found to he strongly dependent on the erbium ion concentration, the signal wavelength, and the relative propagation direction of the pump and signal beams. This dependence is fully explained by the presence of an upconversion mechanism between ions residing in pairs or larger clusters and suggests that other sources of amplifier performance degradation (back-ground loss, excited state absorption, homogenous upconversion) are negligible. The experimental data show that in the present EDFA designs with over 80% quantum/conversion efficiency, the aluminum co-doped fibers with erbium ion concentration less than 20/spl times/10/sup 24/ m/sup -3/ (900 molar ppm Er/sup 3+/) are most suitable.

Journal of Lightwave Technology•Jan 1, 1997•221 citations

Measurement and analysis of pump-dependent refractive index and dispersion effects in erbium-doped fiber amplifiers

Simon Fleming, Tim J. Whitley

In a doped fiber, at wavelengths close to an absorption, the refractive index, and hence the dispersion, is expected to be a strong function of wavelength, as described by the Kramers-Kronig relationship. Furthermore, this spectral variation itself will be a function of pumping. This paper describes an accurate and sensitive experimental determination of the pump dependence of the refractive index in an erbium-doped fiber amplifier. A Mach-Zehnder interferometric measurement is described where only one arm is comprised of doped fiber. Particular attention is paid to accounting for the significant difference in power levels in the two arms and the effects of polarization and incoherent light. The measured refractive-index change matches well with that theoretically predicted. The pumped and unpumped dispersion of the amplifier are calculated. While the extra dispersion is of similar magnitude to that of silica fiber, the impact on long telecommunications systems is likely to be negligible. However, this extra dispersion may be important in shorter systems such as soliton lasers. Given the good agreement between theory and experiment, the variation of dispersion with fractional inversion is calculated from absorption and gain measurements. The presence of codopants is known to alter the absorption and emission spectra; the effect on the dispersion is calculated, and a near linear dependence on germanium concentration is observed.

IEEE Journal of Quantum Electronics•Jul 1, 1996•54 citations

"Analytical Model of Pulse Amplification in Erbium Doped Fiber Amplifier "

Nour. A. Naser, Muhammed. R. Harb, Hassan Abid Yasser

"Doping a part of the optical fiber core by (Er3+ ) ions in presence of external pumping power will lead to form the erbium-doped fiber amplifier (EDFA).The performance of this optical amplifier depends on (the power and the wavelength of the pumping laser, the power and wavelength of the input signal, amplifier length, ion concentration). These parameters will affect the characteristics of EDFA such as amplifier gain, gain saturation, noise figure and output power. However, these characteristics can be determined by solving the EDFA propagation and rate equations. The solution of these equations of two-level laser medium can be done numerically. In this paper, we are proposed a novel method to solve these equations. The reconstructed results are perfectly coincided the well known numerical results.

Muthanna Journal of Pure Science•Oct 14, 2020•0 citations
Transoceanic fiber optic systems that use erbium doped fiber amplifiers(EDFAs) require careful tailoring of chromatic dispersion along the length of the span. One of the parameters of interest to system designers is the additional chromatic dispersion introduced by the erbium ions in the EDFA. The effect of resonant chromatic dispersion due to erbium is also evident in the performance of short length fiber devices such as soliton lasers. Several methods have been used in the past to measure erbium-induced chromatic dispersion. Specifically, Fourier transform spectroscopy and the use of complex atomic susceptibility have been successfully demonstrated. In this paper, we evaluate the complex atomic susceptibility of these fibers with different dopant levels and derive the total dispersion (waveguide and material) of these fibers as a function of wavelength in the 1550 nm range.>
The recent development of the EDFA (erbium-doped fiber amplifier) offers the possibility for uses of the fibers to experiments on coherent pulse propagation such as self-induced transparency (SIT). The guiding of the radiation by the fiber structure eliminates diffraction effects and makes possible the interaction of the radiation with the fiber medium which has resonance effects over long distances. To date, however, experiments on SIT solitons have suffered from diffraction effects that were further complicated by nonlinear interactions. In the present paper, we report for the first time the observation of SIT soliton propagation in an erbium- doped resonant fiber waveguide.
Strong interest in heavily doped erbium-doped waveguides1 and in the applications of heavily doped erbium-doped fibers (EDFs) in lasers has resulted in several recent studies of collective processes in erbium ions. Rapid cross relaxation within a fraction of clustered ions, called pair-induced quenching (PIQ), has been identified as the main cause of EDF performance degradation.2-4 To date, studies on the dependence of EDF performance on ion concentration have been focused on pair/cluster-induced nonsaturable absorption of EDFs,2 which leads to the reduced quantum efficiency (QE) of EDF lasers.4 Recently, detailed theoretical analysis of the effect of PIQ on the performance of erbium-doped fiber amplifiers (EDFAs) has also been reported.4
The dependence of erbium-doped fiber amplifier (EDFA) performance on the erbium ion concentration is studied experimentally and theoretically. The quantum efficiency of the amplifier is found to he strongly dependent on the erbium ion concentration, the signal wavelength, and the relative propagation direction of the pump and signal beams. This dependence is fully explained by the presence of an upconversion mechanism between ions residing in pairs or larger clusters and suggests that other sources of amplifier performance degradation (back-ground loss, excited state absorption, homogenous upconversion) are negligible. The experimental data show that in the present EDFA designs with over 80% quantum/conversion efficiency, the aluminum co-doped fibers with erbium ion concentration less than 20/spl times/10/sup 24/ m/sup -3/ (900 molar ppm Er/sup 3+/) are most suitable.
In a doped fiber, at wavelengths close to an absorption, the refractive index, and hence the dispersion, is expected to be a strong function of wavelength, as described by the Kramers-Kronig relationship. Furthermore, this spectral variation itself will be a function of pumping. This paper describes an accurate and sensitive experimental determination of the pump dependence of the refractive index in an erbium-doped fiber amplifier. A Mach-Zehnder interferometric measurement is described where only one arm is comprised of doped fiber. Particular attention is paid to accounting for the significant difference in power levels in the two arms and the effects of polarization and incoherent light. The measured refractive-index change matches well with that theoretically predicted. The pumped and unpumped dispersion of the amplifier are calculated. While the extra dispersion is of similar magnitude to that of silica fiber, the impact on long telecommunications systems is likely to be negligible. However, this extra dispersion may be important in shorter systems such as soliton lasers. Given the good agreement between theory and experiment, the variation of dispersion with fractional inversion is calculated from absorption and gain measurements. The presence of codopants is known to alter the absorption and emission spectra; the effect on the dispersion is calculated, and a near linear dependence on germanium concentration is observed.
"Doping a part of the optical fiber core by (Er3+ ) ions in presence of external pumping power will lead to form the erbium-doped fiber amplifier (EDFA).The performance of this optical amplifier depends on (the power and the wavelength of the pumping laser, the power and wavelength of the input signal, amplifier length, ion concentration). These parameters will affect the characteristics of EDFA such as amplifier gain, gain saturation, noise figure and output power. However, these characteristics can be determined by solving the EDFA propagation and rate equations. The solution of these equations of two-level laser medium can be done numerically. In this paper, we are proposed a novel method to solve these equations. The reconstructed results are perfectly coincided the well known numerical results.