TUT4 - OPTICAL FIBER COMMUNICATION SYSTEM TUT-4 OPTICAL...

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OPTICAL FIBER COMMUNICATION SYSTEM PROF. A.M.ALLAM TUT-4 OPTICAL SOURCES
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OPTICAL FIBER COMMUNICATION SYSTEM PROF. A.M.ALLAM 1-An injection laser has a GaAs active region with bandgap energy of 1.43 eV. Estimate the wavelength of optical emission from the device. 2- Assume that the optical power from a LED varies with modulation frequency according to this relation: Show that the 3-dB-optic and detected-electrical bandwidths are related by 2 2 1 τ ω + = s s aI P ( ) ( ) electrical f optic f dB dB - - = 3 3 73 . 1
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OPTICAL FIBER COMMUNICATION SYSTEM PROF. A.M.ALLAM 3-The relation of optical power to current for an LED is given by P = 0.02 i. The maximum allowed power is 10 mW. The LED has a dc bias current and a 1MHz ac current applied. (a) Sketch the power-current curve (b) If the peak signal power is 2mW and the peak total power is 10 mW, compute the total peak current, the dc current, the average power,
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This note was uploaded on 03/06/2012 for the course ENGINEERIN 605 taught by Professor Rahmir during the Spring '11 term at Wisconsin.

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TUT4 - OPTICAL FIBER COMMUNICATION SYSTEM TUT-4 OPTICAL...

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