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Consider an LED having a minority carrier lifetime of 5 ns. Find the 3-dB optical bandwidth and the 3-dB electrical bandwidth.

Consider an LED having a minority carrier lifetime of 5 ns. Find the 3-dB optical bandwidth and the 3-dB electrical bandwidth.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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(c) If the internal quantum efficiency is 0.65, what is the external quantum efficiency in cases (a) and (b)?
Transcribed Image Text:(c) If the internal quantum efficiency is 0.65, what is the external quantum efficiency in cases (a) and (b)?
**Problem Statement:** Consider an LED having a minority carrier lifetime of 5 ns. Find the 3-dB optical bandwidth and the 3-dB electrical bandwidth. **Part (a):** A GaAlAs laser diode has a 500-μm cavity length, with an effective absorption coefficient of 10 cm⁻¹. The reflectivities for uncoated facets are 0.32 at each end. Determine the optical gain at the lasing threshold. **Part (b):** If one end of the laser is coated with a dielectric reflector such that its reflectivity increases, determine the changes in the system.
Transcribed Image Text:**Problem Statement:** Consider an LED having a minority carrier lifetime of 5 ns. Find the 3-dB optical bandwidth and the 3-dB electrical bandwidth. **Part (a):** A GaAlAs laser diode has a 500-μm cavity length, with an effective absorption coefficient of 10 cm⁻¹. The reflectivities for uncoated facets are 0.32 at each end. Determine the optical gain at the lasing threshold. **Part (b):** If one end of the laser is coated with a dielectric reflector such that its reflectivity increases, determine the changes in the system.
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