11 OpticalCavities corrrected 2010

11 OpticalCavities corrrected 2010 - Properties of Cavities...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Properties of Cavities All lasers consist of a gain medium and a cavity to produce optical feedback into the gain medium. The gain medium of a semiconductor laser is provided by the light emitting region of our device. The cavity is formed by the active region waveguide and mirrors that reflect the light back and forth through the gain medium. In this next few lectures we are going to discuss the conditions for laser operation and the lasers characteristics. To do so we need first to understand the general characteristics of optical radiation so that terms like density of modes , spontaneous emission, stimulated emission, and population inversion in a semiconductor are meaningful. I Mirror
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Density of Modes in a Cavity One Dimensional Cavity Consider a one dimensional cavity consisting of two infinitely big, perfectly reflecting and parallel mirrors separated by a medium of length, a, and index of refraction, n r . Since the modes of the cavity are reflected by the mirrors only modes that satisfy
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/23/2011 for the course EE 474 taught by Professor Lingo during the Spring '11 term at USC.

Page1 / 4

11 OpticalCavities corrrected 2010 - Properties of Cavities...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online