Effect of wavelength on metrological characteristics of non-holographic fiber specklegram sensor

Abstract

In this paper, we report some results about the effects of varying the wavelength in a structure of a non-holographic fiber specklegram sensor. In these arrangements, the speckle pattern produced by a multi-mode optical fiber is coupled to the asingle-mode optical fiber with lower numerical aperture, which produces a filtering effect that can be used as an optical transduction mechanism. The influence of the wavelength on the sensor performance is evaluated by changing the laser wavelength, and a strong effect on the linearity and reproducibility of its response is found. Lasers emitting at 1310 nm, 1550 nm, and 1625 nm are used.

Keywords

Optical sensing / speckle sensor / optical fiber sensor / mechanical perturbation sensor

References

[1] Saleh B E A, Teich M C. Fundamentals of photonics, 1991, USA: John Wiley & Sons Inc.

[2] Wang B, Huang C, Guo R, Yu F T S. A novel fiber chemical sensor using inner product multimode fiber speckle fields. Proc. SPIE, 2003, 5206, 200-304.

[3] Liu Y, Wei L. Low-cost high-sensitivity strain and temperature sensing using graded-index multimode fibers. Applied Optics, 2007, 46(13): 2516-2519.

[4] Gómez N D, Gómez J A. Effects of the speckle size on non-holographic fiber specklegram sensor. Optics and Laser in Engineering, 2013, 51(11): 1291-1295.

[5] Gómez J A, Lorduy H, Salazar A. Influence of the volume speckle on fiber specklegram sensors based on four-wave mixing in photorefractive materials. Optics Communications, 2011, 284(4): 1008-1014.

[6] Torres P, Aristizabal V H, Andres M V. Modeling of photonic crystal fibers from the scalar wave equation with a purely transverse linearly polarized vector potential. Journal of the Optical Society of America B, 2011, 28(4): 787-791.

[7] Griffiths D J. Introduction to electrodynamics, 1999, USA: Prentice-Hall, Inc.