A novel concept is introduced that utilizes the scattering properties of zinc oxide nanorods to control light guidance and leakage inside optical fibers coated with nanorods. The effect of the hydrothermal growth conditions of the nanorods on light scattering and coupling to optical fiber are experimentally investigated. At optimum conditions, 5% of the incident light is side coupled to the cladding modes. This coupling scheme could be used in different applications such as distributed sensors and light combing. Implementation of the nanorods on fiber provides low cost and controllable nonlithography-based solutions for free space to fiber coupling. Higher coupling efficiencies can be achieved with further optimization.
© 2013 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: March 20, 2013
Revised Manuscript: May 26, 2013
Manuscript Accepted: August 19, 2013
Published: September 10, 2013
H. Fallah, M. Chaudhari, T. Bora, S. W. Harun, W. S. Mohammed, and J. Dutta, "Demonstration of side coupling to cladding modes through zinc oxide nanorods grown on multimode optical fiber," Opt. Lett. 38, 3620-3622 (2013)