This paper describes a method for tuning the resonant wavelengths of slab-coupled optical fiber sensors (SCOSs). This method allows multiple sensors to be interrogated simultaneously with a single tunable laser. The resonances are tuned by rotating a biaxial slab waveguide relative to an optical D-fiber. As the slab waveguide rotates, its effective index of refraction changes causing the coupling wavelengths of the slab waveguide and D-fiber to shift. A SCOS fabricated with potassium titanyl phosphate crystal as the slab waveguide is shown to have resonance tuning ranges of 6.67 and 22.24 nm, respectively, for TM and TE polarized modes.
© 2013 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: January 31, 2013
Revised Manuscript: March 15, 2013
Manuscript Accepted: March 18, 2013
Published: April 16, 2013
Spencer Chadderdon, Leeland Woodard, Daniel Perry, Richard H. Selfridge, and Stephen M. Schultz, "Single tunable laser interrogation of slab-coupled optical sensors through resonance tuning," Appl. Opt. 52, 2682-2687 (2013)