4. Optical Resonators

  1. Takahiro Numai

Published Online: 8 JUN 2011

DOI: 10.1002/9780470769522.ch4

Laser Diodes and their Applications to Communications and Information Processing

Laser Diodes and their Applications to Communications and Information Processing

How to Cite

Numai, T. (2010) Optical Resonators, in Laser Diodes and their Applications to Communications and Information Processing, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470769522.ch4

Author Information

  1. Ritsumeikan University, Japan

Publication History

  1. Published Online: 8 JUN 2011
  2. Published Print: 1 NOV 2010

Book Series:

  1. Wiley Series in Microwave and Optical Engineering

Book Series Editors:

  1. Kai Chang

Series Editor Information

  1. Texas A&M University, USA

ISBN Information

Print ISBN: 9780470536681

Online ISBN: 9780470769522

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Keywords:

  • cleaved facets;
  • diffraction gratings;
  • distributed Bragg reflector (DBR);
  • distributed feedback (DFB);
  • Fabry-Perot cavity;
  • laser diodes (LDs);
  • mirrors;
  • optical resonators;
  • periodic multilayers

Summary

Lasers use a fraction of spontaneously emitted light as input and amplify the fraction by stimulated emission. To feed back the light, optical resonators, or optical cavities, which consist of reflectors, are adopted. Optical resonators are divided into three groups, whose constituent components are mirrors, diffraction gratings, and periodic multilayers. This chapter shows a Fabry-Perot cavity, a ring cavity with mirrors, and a ring cavity with a circular waveguide. It also illustrates distributed feedback (DFB) and a distributed Bragg reflector (DBR). The DFB has an active layer, which generates light, and an optical gain in its corrugated region, which functions by itself as an optical resonator. In contrast, the DBR does not have an active layer in its corrugated region and functions as a reflector, not as a resonator. Therefore, the DBR is combined with other DBRs or cleaved facets to form optical resonators.

Controlled Vocabulary Terms

diffraction gratings; diode lasers; distributed feedback devices; optical resonators; vertical cavity surface emitting lasers