Passive compensation scheme suitable for use in the single-mode fibre interferometer

Abstract

The feasibility of a passive compensation scheme for the SMFI is investigated using a conventional Mach-Zehnder interferometer. Problems normally associated with active feedback stabilisation are eliminated, resulting in infinite range compensation. Minimum detectable phase sensitivities less than 10−6 rad are achievable at frequencies > 1 kHz with the interferometer working in an unshielded environment.