"

Cookies ussage consent

I agree.

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

Fabrication of high reflectivity chirped fiber Bragg gratings and its sensing applications

I. R. IVASCU1,* , R. GUMENYUK2, S. KIVISTÖ2, O. G. OKHOTNIKOV2

Affiliation

  1. University "Politehnica" of Bucharest, Physics Department, Splaiul Independentei, 313, 060042, Bucharest, Romania
  2. Optoelectronics Research Centre, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere, Finland

Abstract

In this paper we present the fabrication technology of high reflectivity chirped fiber Bragg gratings (CFBGs) using the phase mask technique. In order to achieve gratings with high reflectivity, the optical fibers were hydrogen loaded prior photoinscription process. We fabricated gratings having different chirps using phase masks with different chirp rates. The obtained chirped gratings had reflectivity of over 93% and they were rigorously tested. Particularly, the temperature and strain sensitivity of the chirped fiber Bragg gratings was derived. The CFBGs are attractive as intrinsic sensor elements, as fiber components for dispersion compensation, and as in fiber laser reflectors with an additional option of wavelength tunability, e.g. by temperature change..

Keywords

Chirped fiber Bragg grating, Bragg wavelength, Phase mask technique, Hydrogen loaded fiber, Temperature and strain sensor.

Citation

I. R. IVASCU, R. GUMENYUK, S. KIVISTÖ, O. G. OKHOTNIKOV, Fabrication of high reflectivity chirped fiber Bragg gratings and its sensing applications, Optoelectronics and Advanced Materials - Rapid Communications, 5, 9, September 2011, pp.911-915 (2011).

Submitted at: July 28, 2011

Accepted at: Sept. 15, 2011