Research on character of fiber overcoupled devices

Chunyu Liu; Hongan Ye

doi:10.1117/12.725728

29 January 2007 Research on character of fiber overcoupled devices

Chunyu Liu, Hongan Ye

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 627969 (2007) https://doi.org/10.1117/12.725728
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

Abstract

Utilizing the fused-taper technology, a fiber coupler with sensitive to wavelength and strain is obtained. This type coupler is fabricated after Nth coupling period. They are usually called overcoupled devices, N is the number of coupling period, N>>1. The relation between wavelength and coupling ratio of the coupler is analyzed. The maximum sensitive wavelength can be control by the fused-taper technology. When a Bragg wavelength of the fiber Bragg grating (FBG) is agreed with the maximum sensitive wavelength of the coupler, the shift of the Bragg wavelength is can be detected. In this paper we demodulate one FBG which Bragg wavelength is at 1564.69 with the coupler. So the coupler with sensitive to wavelength can be used to demodulate the FBG. And the sensitive to strain of the coupler is also analyzed. The experimental data is present as the theory value, sinusoidal curve. So the coupler can also be used to detect the strain and the temperature with the packaging of the thermal sensitive. The overcoupled couplers have a potential application to the sensing system.

Citation Download Citation

Chunyu Liu and Hongan Ye "Research on character of fiber overcoupled devices", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 627969 (29 January 2007); https://doi.org/10.1117/12.725728

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KEYWORDS

Fiber Bragg gratings

Fiber characterization

Modulation

Sensors

Fiber couplers

Electronics engineering

Fiber optics sensors

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