12 = n* (1 – 21 )] 4. Consider a multimode fiber with core refractive index...
A step-index multimode glass fibre, with a core diameter of 50 um and cladding refractive index of 1.45, is designed to limit the intermodal dispersion to 10ns/km 9. Find its acceptance angle а. Calculate the maximum bit rate for transmission over a distance of 20 km b. A step-index multimode glass fibre, with a core diameter of 50 um and cladding refractive index of 1.45, is designed to limit the intermodal dispersion to 10ns/km 9. Find its acceptance angle а....
3- Consider a bare fiber consisting of core of refractive index 1.48 and having air as cladding What is its NA? What is the maximum incident angle up to which light can be guided by the fiber? 4- Consider a fiber from which cladding is removed over a short length as shown below. Assume that the core and cladding refractive indices are 1.5 and 1.4 respectively, What ill happen to the output power if the bare portion of the fiber...
In the optical fiber below, the core has a refractive index equal to 1.5 and a cladding of refractive index of 1.4. a) What is the speed of light inside the core? b) What is the critical angle at the core-cladding interface? c) What is the maximum angle "t" that the rays leaving the source of light should make with the axis of the fiber so that total internal reflections takes place at the core-cladding interface?
1. An optical fiber has a core diameter of 4 micro-meters and the cladding refractive index n-= 1.46. In order to have a single mode propagation wavelengths at 850nm and above what is the maximum core refractive index we should use?
EXERCISE 1.3-2 Numerical Aperture of the Graded-Index Fiber. Consider a graded-index fiber with the index profile in (1.3-12) and radius a. A tay is incident fro a nto te fibe a its center, making an angle with the fiber axis (see Fig. 1.3-8). Show, in the paraxial Figure 1.3-8 Acceptance angle of a graded-index optical fiber approximation, that the numerical aperture is Numerical Aperture (Graded-Index Fiber) where ea is the maximum angle for which the ray trajectory is confined within...
Suppose an optical fiber has a refractive index n = 1.55. (a) Compute the largest angle between the fiber axis and a light ray that will propagate along the fiber, if the fiber is surrounded by air. (b) Compute the angle, if the fiber is surrounded by a cladding material with index 1.53.
Consider a fiber from which the cladding is removed over a short length as shown in figure below. Assume that the refractive indices of core and cladding are 1.5 and 1.4, respectively. What will happen to the output power if the bare portion of the fiber is covered by a liquid whose refractive index is varied from 1.4 to 1.5?
Problem 1 The following table summarizes the results for all values of d. for a converging lens Case Type Direction Magnification S< do < 26 Real Inverted Enlarged d -2/ Real Inverted Same size de > 27 Real Inverted Reduced d. Virtual Upright Enlarged Sketch and find the image for each case shown in the table by changing the objects position Problem 2 0.25 p 0.23 P AI (b) Graded index (GRIN) rod lens is a glass rod whose refractive...
Problem 1: Fibre optics (2 points) Figure 1: Sketches of the geometry of an optical fibre A long cylinder of dielectric material can guide light via total internal reflection. This idea dates back to the 1870s and forms the basis of the modern fibre optics communication technology. As long as the diameter of these fibres is large compared to the wavelength of the infalling light, its wave nature is negligible and we can use Geometric Optics to study the propagation...