A Raman intensity sensor induced by the Rayleigh scattering in a ring configuration

• Type: Article in International Conference Proceedings Book
• Date: 2010

Authors

correia, c (Author) Other; baptista, jm (Author) Other; marques, mb (Author) FCUP; frazao, o (Author) Other

Conference proceedings International

Title: FOURTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS

Fourth European Workshop on Optical Fibre Sensors

Porto, PORTUGAL, SEP 08-10, 2010

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Other information

Authenticus ID: P-003-AZK

DOI: 10.1117/12.866199

Abstract (EN): In this work, a laser sensor that uses the multipath interference produced inside a ring cavity to measure the power loss induced by a moving taper intensity sensor is described. The laser is created due to the virtual distributed mirror formed by the Rayleigh scattering produced in a dispersion compensating fibre when pumped by a Raman laser. Two laser peaks were formed, one of them is obtained by the Raman gain (1555 nm) inside the ring and the second is created by the combination of the Raman gain and the Rayleigh scattering (1565 nm). A taper sensor is used as displacement sensor and with the increases of losses the second laser peak amplitude is reduced. In the process the first peak is maintained constant and can be used as reference level.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4