Low-dispersion low free-spectral-range Mach-Zehnder interferometer with long straight path lengths on silicon

2025/07/01 by Cael Warner, Warner, Cael
Engineering · #Advanced Fiber Optic Sensors #Advanced Photonic Communication Systems #Applied Physics (physics.app-ph) #FOS: Physical sciences #Optics (physics.optics) #Photonic and Optical Devices

paper · pdf · doi:10.48550/arxiv.2507.01114

openalex publication_date 2025/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Multiple Mach-Zehnder interferometers are constructed using fiber-Bragg grating couplers, y-branches, silicon waveguides, and/or broadband splitters in silicon on insulator strip waveguides to test the effect of variation in waveguide length between consecutive bends on the transmission gain spectrum, free-spectral range, group refractive index, and dispersion. Dispersion is mitigated by increasing the path length between consecutive bends of minimum radius. With long linear waveguide sections, a free spectral range of 0.41 nm is achieved.

Related

• Study of All-Fiber Asymmetric Interleaver Based on Mach-Zehnder Interferometer
• Considerations for the Design of Asymmetrical Mach–Zehnder Interferometers Used as Polarization Beam Splitters on a Submicrometer Silicon-On-Insulator Platform
• Distributed delay-line interferometer based on a Bragg grating in transmission mode
• Suspended silicon waveguides for long-wave infrared wavelengths
• Mach-Zehnder interferometer based all optical flip-flop