My Report

Optical Communication Practice Test 5


Correct Answer: 2 points | Wrong: -1 point
Grades: A* (100% score) | A (80%-99%) | B (60%-80%) | C (40%-60%) | D (0%-40%)
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1. In surface emitter LEDs, more advantage can be obtained by using ____________

2. ________________ photodiodes have large dark currents.

3. ____________ are widely used in first generation systems of optical fiber communication.

4. As compared to planar LED structure, Dome LEDs have ______________ External power efficiency ___________ effective emission area and _____________ radiance.

5. DH surface emitter generally give ____________

6. Internal absorption in DH surface emitter Burros type LEDs is ____________

7. Determine the total carrier recombination lifetime of a double heterojunction LED where the radioactive and nonradioactive recombination lifetime of minority carriers in active region are 70 ns and 100 ns respectively.

8. The techniques by Burros and Dawson in reference to homo structure device is to use an etched well in GaAs structure.

9. To utilize _____________________ of SLDs at elevated temperatures, the use of thermoelectric coolers is important.

10. The process of excitation of an electron from valence band to conduction band leaves an empty hole in the valence band and is called as ____________


 

Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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