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Fiber optic method for measuring the intensity of IR radiation

I. P. CULEAC1,* , Iu. H. NISTOR1, M. S. IOVU1

Affiliation

  1. nstitute of Applied Physics of the Academy of Sciences of Moldova, Str. Academiei 5, Chisinau MD 2028, Republic of Moldova

Abstract

A high sensitivity fiber-optic method for registration of infrared (IR) radiation is proposed. The method is based on the effect of modal interference in an optical fiber. The speckle pattern is registered in the far field of a multimode fiber and is processed by a PC for deriving the output signal. The method also can be applied for registration of temperature, mechanical vibrations, etc..

Keywords

Optical fiber, Infrared, Modal interference, Speckle pattern.

Submitted at: April 13, 2009
Accepted at: April 28, 2009

Citation

I. P. CULEAC, Iu. H. NISTOR, M. S. IOVU, Fiber optic method for measuring the intensity of IR radiation, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 4, pp. 380-385 (2009)