A large-mode-area holey fiber was tapered to a point in which the airholes collapsed, and its dependence on temperature and strain was studied. The transmission spectrum of such a fiber exhibits a series of peaks owing to the interference between the modes of the solid taper waist. We found that the interference peaks shifted to shorter wavelengths as the taper was elongated. However, the peaks were insensitive to temperature. The fabrication and advantages of our novel wavelength-encoded temperature-independent strain sensor compared with other optical fiber strain sensors are discussed.
© 2006 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: September 6, 2005
Revised Manuscript: September 30, 2005
Manuscript Accepted: October 11, 2005
Joel Villatoro, Vladimir P. Minkovich, and David Monzón-Hernández, "Temperature-independent strain sensor made from tapered holey optical fiber," Opt. Lett. 31, 305-307 (2006)