Read the following passage and answer the question given at the end.
If a beam of light enters one end of a transparent rod as in Fig. the light is totally reflected internally and is "trapped" within the rod even if it is curved, provided the curvature is not too great. the rod. is something referred to as a light pipe. A bundle of fine fiber will behave in the same way and has the advantage of being flexible. The study of the properties of such a bundle is an active field of research known as fiber optics.
A bundle may consist of thousand of individual fibers, each of the order of 0.002 to 0.01mm in diameter. If the fiber can be assembled in the bundle so that the relative positions of the ends are the same at both ends, the bundle can transmit an image as shown in Fig.(b). Bundles several km in length have been made. Device using fiber optics are finding a wide range of applications in medical science. The interior of lungs and other passage in the human body can be viewed by insertion of a fiber bundle that can be enclosed in a hypodermic needle for the study of tissues and blood vessels far beneath the skin. Despite the enormous technical difficulties of manufacturing fiber-optic components, such system promise to become an extremely important class of optical systems.
(1) what are the losses in fiber optic?
Read the following passage and answer the question given at the end.
If a beam of light enters one end of a transparent rod as in Fig. the light is totally reflected internally and is "trapped" within the rod even if it is curved, provided the curvature is not too great. the rod. is something referred to as a light pipe. A bundle of fine fiber will behave in the same way and has the advantage of being flexible. The study of the properties of such a bundle is an active field of research known as fiber optics.
A bundle may consist of thousand of individual fibers, each of the order of 0.002 to 0.01mm in diameter. If the fiber can be assembled in the bundle so that the relative positions of the ends are the same at both ends, the bundle can transmit an image as shown in Fig.(b). Bundles several km in length have been made. Device using fiber optics are finding a wide range of applications in medical science. The interior of lungs and other passage in the human body can be viewed by insertion of a fiber bundle that can be enclosed in a hypodermic needle for the study of tissues and blood vessels far beneath the skin. Despite the enormous technical difficulties of manufacturing fiber-optic components, such system promise to become an extremely important class of optical systems.
(1) what are the losses in fiber optic?
The correct options are
A Brillouin zone and Raman scattering
B polarisation
C evanscent field
D diffraction
A. The effect of stimulated Raman and Brillouin scattering on the power handling capacity of optical fibers is considered and found to be important when loss optical fibers are used. B. A low loss and highly birefringent polarization maintaining photonic crystal fiber has been fabricated.
C. Optical fiber tapers with a waist size larger than 1μm are common place in tele-communications and sensor application.
D. In diffraction light goes deviated in different directions and intensity decreases.
A Brillouin zone and Raman scattering
B polarisation
C evanscent field
D diffraction
A. The effect of stimulated Raman and Brillouin scattering on the power handling capacity of optical fibers is considered and found to be important when loss optical fibers are used.
C. Optical fiber tapers with a waist size larger than 1μm are common place in tele-communications and sensor application.
D. In diffraction light goes deviated in different directions and intensity decreases.
