Optical Signal Inversion Phenomenon Derived from the Negative Nonlinear Absorption Effect in Er^<3+> : LiYF_4

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概要

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• The dependence of the negative nonlinear absorption efffect on the modulation degreen and frequency of the incident laser was investigate in Er^<3+>:LiYF_4 crystals.With a decreasing modulation degree, a reverse-phased waveform was obtained in the transmitted waveform for modulation intensities of sinusoidal and rectangle waves.The transmitted waveform was observed symmetrically at modulation frequency of 0.25MHz.However, the transmitted waveform was asymmetrical at higher than 0.5MHz.In addition, the reverse-phased waveforms were obtained for sample lengths greater than 12mm in the incident modulation degree of 10 to 56%.The NNA effect was observed at a temperature range of 20 to 500K.It has been confirmed that a mechanism of the negative nonlinear absorption can be explained by considering an enhanced absorption model for a five-level system of the Er^<3+> ion.

• 社団法人電子情報通信学会の論文
• 1998-09-25

著者

• Yamada Toshikazu

  The Author Is With Production Fundamental Division Chugoku National Industrial Research Institute

• MAEDA Yoshinobu

  The author is with the Department of Information and Control Engineering, Toyota Technological Insti

• Maeda Yoshinobu

  The Author Is With The Department Of Information And Control Engineering Toyota Technological Instit

関連論文

• Optical Signal Inversion Phenomenon Derived from the Negative Nonlinear Absorption Effect in Er^ : LiYF_4

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