Optical Circuits in Fiber Cladding: Femtosecond laser-written Bragg Grating Waveguides

Abstract

First order Bragg Grating Waveguides are inscribed in the core and cladding of optical fibers using oil immersion femtosecond direct laser-writing. A laser-induced birefringence of 2.05x10-4 was inferred from polarization split Bragg resonances.