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Modelling the optical gain and noise of Er3+:Ti:LiNbO3 waveguide Mach-Zehnder interferometer

L. A. PUSCAS1, E. M. ROTAR1, N. N. PUSCAS2,*

Affiliation

  1. Institute for Electrotechnics, Splaiul Unirii, 313, Bucharest, Romania
  2. Physics Department, University ''Politehnica'' Bucharest, Splaiul Independentei 313, 060042, Bucharest, Romania

Abstract

Using a quasi-two-level model in the small gain approximation and the unsaturated regime in this paper we report some original results concerning the evaluation of the spectral optical gain, spectral noise figure and spectral signal-to-noise ratio in the bent Er3+:Ti:LiNbO3 waveguide of the Mach-Zehnder interferometer pumped near 1484 nm using erfc, Gaussian and constant profile of the Er3+ ions in LiNbO3 crystal. We demonstrated that rather high gains (~1.5 dB), low noise figures (~3.5 dB) and good signal-to-noise ratios (~56.5) at the end of the bent arm and also, in the straight one of the integrated Mach-Zehnder interferometer are achievable for 70 mW input pump power. The obtained results can be used for the design of the integrated Mach-Zehnder interferometers and other complex optic devices..

Keywords

Er3+:Ti: LiNbO3 optical waveguides, Integrated Mach-Zehnder interferometer, Gain, Noise figure, Signal-to-noise ratio.

Submitted at: Nov. 20, 2007
Accepted at: July 10, 2008

Citation

L. A. PUSCAS, E. M. ROTAR, N. N. PUSCAS, Modelling the optical gain and noise of Er3+:Ti:LiNbO3 waveguide Mach-Zehnder interferometer, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 8, pp. 2095-2099 (2008)