Theoretical Transient Amplification Characteristics of Optical Waveguide Amplifiers Using Erbium Doped Garnet Crystalline Thin-Film

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概要

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• A thin-film wafeguide amplifier based on Er-doped Garnet crystals is proposed and transient amplification characteristics, studied numerically using time-dependent rate equations and mode evolution equations, are presented. The potential of the amplifier for integration with active devices operating at the present communication wavelength of 1.53 μm band is revealed. Pump wavelengths in the visible and near infrared lead to excited state absorption, and will affect the gain characteristics. which has been included in the present study. Steady state resonse of the Er doped Garnet crystal waveguide amplifiers has been analyzed in order to optimize the gain characteristics, which are further used in the dynamic response analysis. Accordingly, it is shown that a high gain of 20dB/cm is possible to be achieved. Experimentally determined parameters such as waveguide loss, absorption and emission cross-sections have been used for the simulations. Comparisons of the present simulation results with our earlier reported results of quasi-two-level laser model and other reported results are also presented. Understanding the dynamic characteristics of the integrated optic waveguide amplifiers is necessary when the input signal is modulated in various formats. Because of the slower gain dynamics of the Er doped Garnet amplifier medium, it is shown that the longer signal input pulses are observed to be distorted upon amplification. Very short single pulse of nano- and pico-second duration are amplified without change in the pulse shape. Input pulse of square, Gaussian and Lorentzian shapes have been considerd for the numerical examples.

• 社団法人電子情報通信学会の論文
• 1998-12-25

著者

• Miyazaki Y

  The Department Of Information And Computer Sciences Toyohashi University Of Technology

• MIYAZAKI Yasumitsu

  the Department of Information and Computer Sciences, Toyohashi University of Technology

• Miyazaki Yasumitsu

  The Department Of Computer And Information Sciences Toyohashi Univ.of Tech.

• Balasubramanian R

  Toyohashi Univ. Toyohashi

• BALASUBRAMANIAN Rakkappan

  the Department of Information and Computer Sciences, Toyohashi University of Technology

関連論文

• Analysis of Interaction between Optical Waves and Magnetostatic Surface Waves in Three-Dimensional Optical Waveguide Using Multilayered Garnet Structure
• Theoretical Transient Amplification Characteristics of Optical Waveguide Amplifiers Using Erbium Doped Garnet Crystalline Thin-Film
• A Performance Analysis of Buffered DQDB Network with Request Arrival Process Depending on Its Request Counter Value and Its Location on the Buses

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