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Internal critical angle in core at core-cladding interface of a step index fiber is 78.6°. The refractive index of cladding is 1.45. find acceptance angle
A step index fiber is made with a core of refractive index 1.36, a diameter of 49pm and a fractional refractive index change of 0.025. it is operated at a wavelength of 1.3. Then the numerical aperture of the cable is
A converging lens of focal length 0.40cm is combined with a diverging lens of focal length 0.20cm the power of combination of the lens is
resolving power of telescope
resolving power of microscope
object is placed in front of a diverging lens with a focal length of 6 CM. Find the image distance for an object distance of 9 cm. Answer in units of cm.
object is placed in front of a diverging lens with a focal length of 8 CM. Find the image distance for an object distance of 12 cm. Answer in units of cm.
A mechanical splice in a multimode step index fiber has a lateral offset of 16% of the fiber core radius. The fiber core has a refractive index of 1.49, and an index matching fluid with a refractive index of 1.45 is inserted in the splice between the butt-jointed fiber ends. Assuming no longitudinal or angular misalignment, estimate the insertion loss of the splice.
Describe, with the aid of suitable diagrams, three common techniques used for the mechanical splicing of optical fibers. A mechanical splice in a multimode step index fiber has a lateral offset of 16% of the fiber core radius. The fiber core has a refractive index of 1.49, and an index matching fluid with a refractive index of 1.45 is inserted in the splice between the butt-jointed fiber ends. Assuming no longitudinal or angular misalignment, estimate the insertion loss of the splice.
