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OPTICAL LIMITING IN NONLINEAR FIBER BRAGG GRATING

SANTOSH PAWAR

Department of Electronics and Communication, Malwa Institute of Technology, Nipaniya, Indore-452016, India

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SHUBHADA KUMBHAJ

Department of Applied Physics, Shri G. S. Institute of Technology and Science, 23, Park Road, Indore-452003, India

Corresponding author.

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PRATIMA SEN

School of Physics, Devi Ahilya Vishvavidyalaya, Khandwa Road, Indore-452017, India

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, and

PRANAY KUMAR SEN

Department of Applied Physics, Shri G. S. Institute of Technology and Science, 23, Park Road, Indore-452003, India

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https://doi.org/10.1142/S0218863512500178Cited by:5 (Source: Crossref)

Abstract

Nonlinear refraction based optical limiting phenomena is investigated analytically in the transmission mode of a fiber Bragg grating using coupled mode theory. A simple expression for intensity dependent transmittivity has been obtained by incorporating the Kerr effect in nonlinear coupled equations. The transmission is studied as a function of the incident intensity at various incident wavelengths. We have found that the transmittance of the grating gradually increases as a ramp function and becomes constant after a critical intensity when the wavelength of the incident light is tuned above the Bragg wavelength.

Keywords:

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