Compute the maximum radius allowed for a fiber having core refractive index 1.5 and 1.48.
Compute the maximum radius allowed for a fiber having core refractive index 1.5 and 1.48. the fiber is to support only one mode at a wavelength of 1500 nm
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Discuss the phenomenon of Fraunhofer’s diffraction at a single slit
FRAUNHOFER DIFFRACTION AT SINGLE SLIT Let us first consider a parallel beam of light incident normally on a slit AB of width ‘a’ which is of order of the wavelength of light. A real image of diffraction pattern is formed…
With neat energy level diagram describe the construction and working of a He-Ne Laser.
It consists of a long discharge tube of length 50 cm and diameter 1 cm. The tube is filled with a mixture of He and Ne in the ratio 10:1. Electrodes are provided to produce a discharge in the gas…
What are different techniques to synthesize nanomaterials?
Answer :: The different techniques to synthesis nanomaterial are : 1.Ball milling 2.Sputtering 3.Vapour deposition 4.Sol gel technique 5.LASER synthesis 6.Inert gas condensation BALL MILLING PROCESS : 1. As the name suggests, the ball milling method consists of balls and…
State the advantages of optical fiber cables on conventional electrical cables.
Advantages of optical fiber cables on conventional electrical cables. . Large Potential bandwidth: As the optical carrier frequency is in the range of 1012 to 115 Hz it yields a far greater potential transmission bandwidth, than metallic cable systems. Therefore…
Find the divergence and curl of a vector
Find the divergence and curl of a vector
Derive the expression of numerical aperture for a step index fiber.
Derive the expression of numerical aperture for a step index fiber. A light ray enters an optical fiber from air. The fiber has core refractive index 1.52 and cladding refractive index 1.41. Find the Critical angle and Numerical aperture.
Light is incident normally on a grating 0.25 cm wide with 1250 lines.
Data : Number of lines / cm (N)= 5000 m=1 λ1=5895 Å λ2=5901 Å Formula : (a+b)sinθ=Nλ mN=λ/dλ Calculations : —1 —-2 —3 Number of lines / cm required for grating is 983 Number of lines / cm available for…
Explain top down and bottom up approaches to prepare nanomaterials.
Top-down and bottom-up approaches are two common strategies used in the preparation of nanomaterials, each with its own advantages and limitations. Top-Down Approach: In the top-down approach, larger structures are broken down into smaller ones until the desired nanoscale size…
Explain the construction and reconstruction of hologram.
Holography technique to obtain 3D image of an object: 1. Holography is the science and practice of making holograms. Holography is actually a recording of interference pattern formed between two beams of coherent light coming from the same source. 2.…