8. An optical fiber of diameter 125 um has a tension of 500,000 lbs/in2 . How...
8. An optical fiber of diameter 125 um has a tension
of 500,000 lbs/in2
. How much weight can the
fiber handle?
Homework Answers
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8. An optical fiber of diameter 125 um has a tension
of 500,000 lbs/in2
. How...
41. | A glass optical fiber in a communications system has a diameter of 9.0 um. a. What maximum force could this...
41. | A glass optical fiber in a communications system has a diameter of 9.0 um. a. What maximum force could this fiber support without breaking? b. Assume that the fiber stretches in a linear fashion until the instant it breaks. By how much will a 10-m-long fiber have stretched when it is at the breaking point?
6. An optical fiber has an acceptance angle of 10.95 degrees. What's the numerical aperture for...
6. An optical fiber has an acceptance angle of 10.95 degrees. What's the numerical aperture for this fiber? A. 0.16 B. 1.02 C. 0.27 D. 0.19 7. An optical fiber has a core refractive index of 1.495 and a cladding refractive index of 1.47. What's the acceptance angle for this fiber? A. 13.11° B. 0.272° C. 9.79° D. 15.80° 8. While traveling through a cable, a signal loses 18.7 percent of its original power. What's this loss expressed in dB?...
Consider an optical fiber that has a 200-μm core diameter and a 240-μm cladding diameter. (a)...
Consider an optical fiber that has a 200-μm core diameter and a 240-μm cladding diameter. (a) Show that the size of the active area in a bundle with one ring is 0.22 mm2. (b) Show that the ratio of the active area to the total cross sectional area of the bundle is 54 %.
1. The inner core of an optical fiber has a diameter of 0.1 mm and an...
1. The inner core of an optical fiber has a diameter of 0.1 mm
and an index of refraction of n1 = 1.5. The outer core
of the fiber has an index of refraction of n2 =
1.49.
12 = 1.49 ni = 1.5 n2 = 1.49 (a) (7 points) Coming from air, what is the largest angle relative to the aris of the fiber for which light is totally internally reflected in the fiber? (b) (6 points) I want...
1. An optical fiber has a core diameter of 4 micro-meters and the cladding refractive index...
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?
2. A digital optical fiber link employing ideal binary signaling at a rate of 50 Mbps operates at a wavelength of 1.3 um. The detector is a germanium photodiode which has a quantum efficiency of...
2. A digital optical fiber link employing ideal binary signaling at a rate of 50 Mbps operates at a wavelength of 1.3 um. The detector is a germanium photodiode which has a quantum efficiency of 45% at this wavelength. An alarm is activated at the receiver when the bit error rate drops below 10. Calculate the theoretical minimum optical power required at the photodiode in order to keep the alarm inactivated. Comment briefly on the reasons why in practice the...
2. You have a spool of optical fiber with 8 µm core diameter. ncore = 1.468....
2. You have a spool of optical fiber with 8 µm core diameter. ncore = 1.468. ncladding = 1.464. (a) [2.5 pts] Calculate the V-number assuming operation at λo = 1550 nm (a through d) (b) [2.5 pts] Calculate the cut-off wavelength (c) [2.5 pts] Calculate the numerical aperture (d) [2.5 pts] Calculate the maximum acceptance angle
Photonics and Optical Revision Sheet 1 1. Caculate the photon energy in eV for a wavelength of 1....
Photonics and Optical Revision Sheet 1 1. Caculate the photon energy in eV for a wavelength of 1.55 um 2, A 1.55 μm digital communications system operating at 4 GBits/s receives an average power of -24 dBm at the detector. On the assumption that 1 and 0 bits are equally likely to occur how many photons are received within each 1 bit? 3. A1.3 um digital communications system operating at 3 GBits/s receives an average power of -29 dBm at...
Some biological systems can act like an optical fiber. Below is a drawing which illustrates how...
Some biological systems can act like an optical fiber. Below is a drawing which illustrates how this might occur. Imagine you have a long, thin cell surrounded by fluid with index of refraction 1.38. The average index of refraction inside the cell is 1.48. Compute the critical angle, theta_crit, for total internal reflection for this system. Show all of your computations. What will the angle of refraction be for ray A (shown below) that has an angle of incidence of...
8. (5 P) A 125 cm length of string has mass 2.00 g and tension force...
8. (5 P) A 125 cm length of string has mass 2.00 g and tension force 7.00 N. (a) What is the wave speed for this string? (b) for which mass is the speed twice as large?
41. | A glass optical fiber in a communications system has a diameter of 9.0 um. a. What maximum force could this fiber support without breaking? b. Assume that the fiber stretches in a linear fashion until the instant it breaks. By how much will a 10-m-long fiber have stretched when it is at the breaking point?
1. The inner core of an optical fiber has a diameter of 0.1 mm
and an index of refraction of n1 = 1.5. The outer core
of the fiber has an index of refraction of n2 =
1.49.
12 = 1.49 ni = 1.5 n2 = 1.49 (a) (7 points) Coming from air, what is the largest angle relative to the aris of the fiber for which light is totally internally reflected in the fiber? (b) (6 points) I want...
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?
2. A digital optical fiber link employing ideal binary signaling at a rate of 50 Mbps operates at a wavelength of 1.3 um. The detector is a germanium photodiode which has a quantum efficiency of 45% at this wavelength. An alarm is activated at the receiver when the bit error rate drops below 10. Calculate the theoretical minimum optical power required at the photodiode in order to keep the alarm inactivated. Comment briefly on the reasons why in practice the...
Photonics and Optical Revision Sheet 1 1. Caculate the photon energy in eV for a wavelength of 1.55 um 2, A 1.55 μm digital communications system operating at 4 GBits/s receives an average power of -24 dBm at the detector. On the assumption that 1 and 0 bits are equally likely to occur how many photons are received within each 1 bit? 3. A1.3 um digital communications system operating at 3 GBits/s receives an average power of -29 dBm at...
Some biological systems can act like an optical fiber. Below is a drawing which illustrates how this might occur. Imagine you have a long, thin cell surrounded by fluid with index of refraction 1.38. The average index of refraction inside the cell is 1.48. Compute the critical angle, theta_crit, for total internal reflection for this system. Show all of your computations. What will the angle of refraction be for ray A (shown below) that has an angle of incidence of...
8. (5 P) A 125 cm length of string has mass 2.00 g and tension force 7.00 N. (a) What is the wave speed for this string? (b) for which mass is the speed twice as large?
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