EEE440 Modern Communication Systems Optical Fibre
... propagate down the fiber optic cable. They lose some of their energy into heat and results in an attenuated output signal. The bouncing rays and the lowest order mode, traveling down the center axis, are all traversing paths of different lengths from input to output. Consequently, they do not all re ...
... propagate down the fiber optic cable. They lose some of their energy into heat and results in an attenuated output signal. The bouncing rays and the lowest order mode, traveling down the center axis, are all traversing paths of different lengths from input to output. Consequently, they do not all re ...
Spectroscopic Imaging using Terahertz Time-Domain Signals
... In this work, we propose a new technique to determine simultaneously the thickness and the complex index of refraction of an unknown material. The THz-TDS system provides a time-domain signal of the sample that reveals not only the initial transmission through the material, but also several subseque ...
... In this work, we propose a new technique to determine simultaneously the thickness and the complex index of refraction of an unknown material. The THz-TDS system provides a time-domain signal of the sample that reveals not only the initial transmission through the material, but also several subseque ...
Refraction in Media with a Negative Refractive Index
... for the x and y axes, respectively), that stores the dielectric constant, and the electric and magnetic field values. By use of a finite time step, t 0:0128a=c, the fields are recursively updated on every grid point. This algorithm numerically reproduces the propagation of the electromagnetic fie ...
... for the x and y axes, respectively), that stores the dielectric constant, and the electric and magnetic field values. By use of a finite time step, t 0:0128a=c, the fields are recursively updated on every grid point. This algorithm numerically reproduces the propagation of the electromagnetic fie ...
Slide 1
... In other words, the fiber is designed to have a V number between 0 and 2.4. This relatively small value means that the fiber radius and , the relative refractive index difference, must be small. No intermodal dispersion exists in single mode fibers because only one mode exists. UNIT III ...
... In other words, the fiber is designed to have a V number between 0 and 2.4. This relatively small value means that the fiber radius and , the relative refractive index difference, must be small. No intermodal dispersion exists in single mode fibers because only one mode exists. UNIT III ...
1 L2: Reflection and Refraction c3.L2 REFLECTION AND
... material, so that a thick piece of a transparent material may appear to be opaque. Furthermore, the rate at which light is absorbed as it travels through the material can depend on the spectral composition of the light, i.e. on the mixture of different frequency components. For example white light, ...
... material, so that a thick piece of a transparent material may appear to be opaque. Furthermore, the rate at which light is absorbed as it travels through the material can depend on the spectral composition of the light, i.e. on the mixture of different frequency components. For example white light, ...
Optical Fibers in Communication
... From Snell’s Law we find that refraction (as shown by the dashed line) can only occur when the angle theta1 is large enough. This implies that as the angle is reduced, there must be a point when the light ray is reflected, where theta1 = theta2. The angle where this happens is known as the critical ...
... From Snell’s Law we find that refraction (as shown by the dashed line) can only occur when the angle theta1 is large enough. This implies that as the angle is reduced, there must be a point when the light ray is reflected, where theta1 = theta2. The angle where this happens is known as the critical ...
Topic 6 - Interference
... For some general point P, the 2 arriving waves will have a path difference which is some fraction of a wavelength. This corresponds to a difference in the phases of the electric field oscillations arriving at P: ...
... For some general point P, the 2 arriving waves will have a path difference which is some fraction of a wavelength. This corresponds to a difference in the phases of the electric field oscillations arriving at P: ...
Ultrahigh Precision Absolute and Relative Rotation Sensing using
... reference of a Sagnac interferometer to describe possible light dragging phenomena in a moving dielectric medium. In this case, we also show that use of slow light can hugely enhance the rotational sensitivity by a factor as large as slowing in the medium. Such a system is most appropriate for preci ...
... reference of a Sagnac interferometer to describe possible light dragging phenomena in a moving dielectric medium. In this case, we also show that use of slow light can hugely enhance the rotational sensitivity by a factor as large as slowing in the medium. Such a system is most appropriate for preci ...
Question bank Physics Part1 (Updated 9-July-12)
... 39. Fresnel’s biprism fringes are observed with white light. When a thin transparent sheet covers one-half part of the biprism the central fringe shifts sideways by 14.97mm. With the same geometry the fringe width with Hg green light (λ=5461Ǻ) comes out to be 0.274mm. Deduce the thickness of the she ...
... 39. Fresnel’s biprism fringes are observed with white light. When a thin transparent sheet covers one-half part of the biprism the central fringe shifts sideways by 14.97mm. With the same geometry the fringe width with Hg green light (λ=5461Ǻ) comes out to be 0.274mm. Deduce the thickness of the she ...
Click
... periodic manner. In isotropic materials, when a light beam is incident, it refracts a single ray. It means that in such material the refractive index is same in all direction. e. g. Glass ,water and air Anisotropic Materials: In anisotropic material, the arrangement of atoms differs in different ...
... periodic manner. In isotropic materials, when a light beam is incident, it refracts a single ray. It means that in such material the refractive index is same in all direction. e. g. Glass ,water and air Anisotropic Materials: In anisotropic material, the arrangement of atoms differs in different ...
wavelength dependence of the light-induced index
... The technique permits the measurement of the dispersion in the photoinduced index change. In the case of our UV irradiated Ge-doped silica fibers, a change in refractive index of 2.3 X ...
... The technique permits the measurement of the dispersion in the photoinduced index change. In the case of our UV irradiated Ge-doped silica fibers, a change in refractive index of 2.3 X ...
Laser and its applications
... system of interference fringes due to the range of amplitudes and phases of the various components of the light scattered from the object. This interference pattern, which is unique to a particular object, is stored in the photographic emulsion when the plate is developed. This record is called a ho ...
... system of interference fringes due to the range of amplitudes and phases of the various components of the light scattered from the object. This interference pattern, which is unique to a particular object, is stored in the photographic emulsion when the plate is developed. This record is called a ho ...
fundamental topics in physics
... (i) Using the Maxwell equation E 0 , show that the H field is polarised in the t y-direction with an amplitude of H 0 k / 0 E0 E0 / 0 c , where c k is the speed of light. [8 marks] (ii) The Poynting vector for an EM wave is given by N E H . a. Discuss briefly the physi ...
... (i) Using the Maxwell equation E 0 , show that the H field is polarised in the t y-direction with an amplitude of H 0 k / 0 E0 E0 / 0 c , where c k is the speed of light. [8 marks] (ii) The Poynting vector for an EM wave is given by N E H . a. Discuss briefly the physi ...
Document
... It should be noted that the fiber core will propagate the incident light rays only when it is incident at an angle greater than the critical angle c. The geometry of the launching of the light rays into an optical fiber is shown in the following Fig. UNIT III ...
... It should be noted that the fiber core will propagate the incident light rays only when it is incident at an angle greater than the critical angle c. The geometry of the launching of the light rays into an optical fiber is shown in the following Fig. UNIT III ...
A simple method for Bragg diffraction in volume holographic gratings Heifetz,
... propagation vectors and contain information about the propagation constants and the directions of propagation of R and the diffracted beam S. We allow the incident beam to deviate from the Bragg angle but keep the incident wavelength fixed. We will assume in the following that the grating is imm ...
... propagation vectors and contain information about the propagation constants and the directions of propagation of R and the diffracted beam S. We allow the incident beam to deviate from the Bragg angle but keep the incident wavelength fixed. We will assume in the following that the grating is imm ...
6.0 Mb - Todd Satogata
... § A single mirror produces a single reflection: that’s straightforward. § Multiple mirrors require you to trace multiple reflections. § Your brain thinks the light is going straight when it’s really reflecting, so you “see” an image of an object as though the light traveled in a straight line ...
... § A single mirror produces a single reflection: that’s straightforward. § Multiple mirrors require you to trace multiple reflections. § Your brain thinks the light is going straight when it’s really reflecting, so you “see” an image of an object as though the light traveled in a straight line ...
full text pdf
... profiles, b) mismatch in the imaginary refractive index (or optical absorption), and c) transverse optical structure in the silks. The electromagnetic scattering theory can then be used to link the observed residual visibility to the optical characteristics of the silks, enabling the measurement of ...
... profiles, b) mismatch in the imaginary refractive index (or optical absorption), and c) transverse optical structure in the silks. The electromagnetic scattering theory can then be used to link the observed residual visibility to the optical characteristics of the silks, enabling the measurement of ...