Demonstration of displacement-measurement-sensitivity proportional to inverse group index of intra-cavity medium in a ring resonator

G. S. Pati*, M. Salit, K. Salit, M. S. Shahriar

*Corresponding author for this work

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

We show that an intra-cavity medium with dispersion modifies the sensitivity of the cavity resonance frequency to a change in its length by a factor inversely proportional to the group index, ng, in the medium. For a positive group index characteristic of the slow-light media, with a very large value of ng, this effect can help in constructing highly frequency-stable cavities for various potential applications without taking additional measures for mechanical stability. For a negative group index characteristic of the fast-light media, with ng close to a null value, this implies enhancement in sensitivity to change in cavity length. This enhancement in turn can be employed to increase the sensitivity of a ring laser gyroscope.

Original languageEnglish (US)
Pages (from-to)4931-4935
Number of pages5
JournalOptics Communications
Volume281
Issue number19
DOIs
StatePublished - Oct 1 2008

Keywords

  • 020.1670
  • 020.3690
  • 300.6450

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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