In this paper we address the problem of optimizing an unbalanced Mach-Zehnder interferometer, for a given pure input state and considering specific detection scheme. While optimum transmission coefficient first beam splitter can be uniquely determined via quantum Fisher information only [Phys. Rev. A 105, 012604 (2022)], second is detection-scheme dependent, too. We systematically give analytic...

Abstract In this work we address the problem of phase sensitivity optimization for an unbalanced Mach-Zehnder interferometer. While quantum Fisher information can be employed in order to obtain optimum transmission coefficient first beam splitter, is no longer true second one, whose detection-scheme dependent. We thus consider three commonly used detection schemes and provide optimal solution e...

we propose a new ring resonator side-coupled m-z interferometer all-optical switch throughthe pumped nonlinear directional coupler. by controlling pump power p to lead the coupler reflectivityr approaching to 1, the resonator finesse will be enhanced dramatically, and then the minimumswitching power in silica-based practice devices can be obtained. as a sample, we use a nonlinearcoupler made by...

The Mach–Zehnder intensity Modulator (MZM), named after Ludwig Mach and Zehnder, is based on the corresponding interferometer. It splits light into two counter-rotating partial beams, which are later recombined with a controlled phase difference. output of MZM depends difference interferometer paths. This usually adjusted by an electrical voltage applied to Phase Shifter (PS) placed in one arms...