INVESTIGATION OF THE MECHANISM OF RADIATION PROPAGATION 
AT SIDE ILLUMINATION OF A LIGHT GUIDE

G. F. Gornostaev, G. A. Frolov, and M. V. Trikula

UDC 536.3:681.586.5

@ABSTRACT = A design of a fiber-optic distributed-type detector of 
radiation sources arbitrarily located in the technological control 
zone is proposed. We have elaborated a method for recording scattered 
and directed radiation flows supplied to the side surface of the optical 
fiber based on measurement of the luminous flux diffusely scattered 
by the technological microdefects of the optical fiber. It has been 
established that the scattered flux is concentrated mainly in the 
optical fiber cladding. The detector sensitivity to the radiation 
from a gas flame, a laser diode, and background sources has been investigated.

I. N. Frantsevich Institute for Problems of Material 
Science, National Academy of Sciences of Ukraine, 3 Krzhizhanovskii 
Str., Kiev, 03142, Ukraine; email: frolov@alfacom.net. Translated 
from Inzhenerno- Fizicheskii Zhurnal, Vol. 77, No. 3, pp. 64-68, 
May-June, 2004. Original article submitted September 18, 2003.