Operating characteristics of an optical filter with a linearly periodic refractive index pattern in the filter material

Sant Prasad Ojha, Pankaj Kumar Choudhury, Prasad Khastgir, Onkar Nath Singh

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A design for the fabrication of an IR filter by using a linearly periodic refractive index pattern on the macroscopic scale in a suitable material has been proposed. To predict allowed and forbidden bands of wavelengths for the lower modes, a mathematical analysis is presented. Numerical estimates of allowed and forbidden bands are also made. Several parameters controlling the range of operation and region of allowed wavelength bands have been identified. It is being suggested that the technical knowhow used in the manufacturing of optical fibres and integrated optical devices can successfully be employed for the fabrication of these filters.

Original languageEnglish
Pages (from-to)281-285
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume31
Issue number2 A
Publication statusPublished - Feb 1992
Externally publishedYes

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Optical filters
optical filters
forbidden bands
Refractive index
refractivity
filters
Fabrication
Wavelength
Optical devices
Optical fibers
fabrication
applications of mathematics
wavelengths
manufacturing
optical fibers
estimates

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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AU - Choudhury, Pankaj Kumar

AU - Khastgir, Prasad

AU - Singh, Onkar Nath

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AB - A design for the fabrication of an IR filter by using a linearly periodic refractive index pattern on the macroscopic scale in a suitable material has been proposed. To predict allowed and forbidden bands of wavelengths for the lower modes, a mathematical analysis is presented. Numerical estimates of allowed and forbidden bands are also made. Several parameters controlling the range of operation and region of allowed wavelength bands have been identified. It is being suggested that the technical knowhow used in the manufacturing of optical fibres and integrated optical devices can successfully be employed for the fabrication of these filters.

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