Analysis and improvement of Mach-Zehnder modulator linearity performance for chirped and tunable optical carriers

On the performance of a linearized dual parallel Mach–Zehnder electro-optic modulator

“…The proposed DPD-MZM architecture considers two parallel MZM with asymmetric optical signal (α) and electrical radiofrequency (RF) signal (β) feeding. A parallel MZM architecture [9] compared with a single MZM achieves an improvement of 10 dB spurious-free dynamic range (SFDR), as shown in [3]. In the proposed scheme, the use of opposite quadrature bias point (QB) and optical and electrical asymmetric feeding in the DPD-MZM architecture results in a significant increase of the SFDR as it is stated in this paper, as SFDR is an important quality factor in analog systems [10].…”

“…Several techniques have been proposed to linearize the EOM transfer function using pre-distortion and post-distortion electronic circuit. For example, performing a dynamic bias control [2] or designing an appropriate electrode to decrease wavelength EOM dependence [3], which limits the EOM optical bandwidth. On the other hand, optical linearization techniques [1], based on parallel and serial Mach-Zehnder modulator (MZM) architectures achieve broadband EOM linearization [4][5][6][7].…”

A single sideband radio-over-fiber system with improved dynamic range incorporating a dual-electrode dual-parallel Mach–Zehnder modulator

“…is the optic differential delay between the two branches, n 1 and n 2 are medium refractive indexes of two branches, λ is the optic wavelength in vacuum, L is the length of the electrode, r 33 is the electro-optical coefficient, and Γ λ ( ) is a confinement factor [12].…”

Polymer-Based Hybrid-Integrated Photonic Devices for Silicon On-Chip Modulation and Board-Level Optical Interconnects

“…Bias-free Y-fed directional coupler (YFDC) modulators have been shown to provide better linear transfer functions compared to the sine-squared transfer curve of conventional MZI modulators [33,34]. The device linearity can be further enhanced when the YFDC modulators are incorporated with the Δβ-reversal technique to suppress IMD3s [33,[35][36][37][38].…”