Development of electrically tunable optical filters based on fiber Bragg gratings

Nam Quoc Ngo; Seriampalayam R. Natarajan; Meng Guan Chua; Winson Boon Chew Sheo; Kantisara Pita; G. Chen; Chuan Swee Tjin; Ping Shum

doi:10.1117/12.481250

28 August 2002 Development of electrically tunable optical filters based on fiber Bragg gratings

Nam Quoc Ngo, Seriampalayam R. Natarajan, Meng Guan Chua, Winson Boon Chew Sheo, Kantisara Pita, G. Chen, Chuan Swee Tjin, Ping Shum

Author Affiliations +

Proceedings Volume 4904, Optical Fiber and Planar Waveguide Technology II; (2002) https://doi.org/10.1117/12.481250
Event: Asia-Pacific Optical and Wireless Communications 2002, 2002, Shanghai, China

Abstract

We demonstrate the development of tunable optical filters based on fiber bragg gratings (FBGs). A distributed on fiber resistive heater consisting of a thin metal film is deposited by means of an Electron Beam Evaporator onto the outer surface of an uniform FBG. The physics of heat flowand diffusion in these structures leads to resistive heating of the metal film that follow, to a remarkably good approximation, the local resistance of the coating. This generated heating induces changes in the fiber’s refraction index (thermo-optic effect), which together with the thermal expansion effect of fiber causes a shift in the Bragg wavelength thereby achieving the tunability. Experimental results show a dc tuning range of 4.284 nm (nickel as thin film) with a corresponding electrical power of 569 mW. A maximum efficiency of 8.133 nm/W (gold as thin film) was obtained for dc tuning.

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Nam Quoc Ngo, Seriampalayam R. Natarajan, Meng Guan Chua, Winson Boon Chew Sheo, Kantisara Pita, G. Chen, Chuan Swee Tjin, and Ping Shum "Development of electrically tunable optical filters based on fiber Bragg gratings", Proc. SPIE 4904, Optical Fiber and Planar Waveguide Technology II, (28 August 2002); https://doi.org/10.1117/12.481250

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