# HW1 - B Calculate the approximate number of modes for...

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ECE 228A: PROBLEM SET #1 DUE THURSDAY, October 15, 2010 READING: Read Agrawal, Chapter 1,2 PROBLEMS: 1. Consider a fiber with a 80 micron core diameter. A) If n 1 =1.48 and =1%, calculate the V-parameter at an operating wavelength of 850 nm. B) For a wavelength of 1300 nm. 2. Calculate the numerical aperture of a step index fiber having a core index of 1.46 and a cladding index of 1.44. What is the largest angle of the ray that is accepted by the fiber if the fiber is in air? 3. Design a single mode fiber with V=2.2 for operation at 1.3 micron with a fused silica core (n 1 =1.458) and a numerical aperture of 0.1. A) Find the cladding index n 2 and the radius of the fiber.
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Unformatted text preview: B) Calculate the approximate number of modes for operation at 820 nm. 4. Plot the maximum distance of transmission versus bit rate for these five generations of systems: a. LED based 850 nm multimode fiber transmission b. Laser based 1310 nm single mode fiber transmission c. Single frequency DFB laser based 1550 nm single mode fiber transmission d. Single frequency DFB laser based 1550 nm dispersion shifted single mode fiber transmission e. External modulator based single frequency DFB laser based 1550 nm dispersion shifted single mode fiber transmission You will need to make a number of assumptions to plot these curves. State your assumptions clearly....
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