Fabrication of triangular chirped fiber Bragg grating and its application in single-sideband modulation based radio over fiber system

Abstract

In this work, we present an approach for fabricating triangular chirped fiber Bragg grating. Application of single-sideband modulation based radio over fiber system employing this grating is also analyzed. The proposed technology is based on phase mask and index modulation with changing velocity. A triangular fiber Bragg grating with 1.9 nm base width of transmission spectrum and 0—15 dB of transmission depth was fabricated experimentally. Due to the negative slope in transmission spectrum, the grating can be used in the radio over fiber system. In the proposed scheme, only a single grating is used to achieve two functions, i.e. OSSB+C generation from DSB modulation signals, and reducing the carrier to sideband ratio of the generated signals. Numerical calculation and simulation ware performed and some discussions are given.