Spectral Shaping Based via IntegratedCoupled Sagnac Loop Reflectors in a Self-Coupled Nanowire

Abstract

We propose and theoretically investigate integrated photonic filters based on coupled Sagnac loop reflectors (SLRs) formed by a self-coupled wire waveguide. By tailoring coherent mode interference in the device, three different filter functions are achieved, including Fano-like resonances, wavelength interleaving, and varied resonance mode splitting. For each function, the impact of device structural parameters is analyzed to facilitate optimized performance. Our results theoretically verify the proposed device as a compact multi-functional integrated photonic filter for flexible spectral shaping.

High performance optical filters based on advanced coupled Sagnac loop waveguide reflectors

“…The ZWC-SLR resonators can be considered to be hybrid filters consisting of both finite-impulse-response (FIR) and infinite-impulse-response (IIR) filter elements as well as standing-wave (SW) and travelling-wave (TW) filter elements that provide more versatile mode interference and significantly improved flexibility for spectral engineering [25][26][27][28][29][30]. Combining this approach with highly nonlinear thin films [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] would offer exciting possibilities for advanced nonlinear integrated devices. * dmoss@swin.edu.au…”