Optical interferometer with squeezed vacuum and reduced guided- acoustic- wave brillouin scattering noise

摘要

An interferometric measurement scheme utilizing squeezed light wherein an input pulse is split into two consecutive input pulses separated by a time interval that is less than the inverse spectral width of GAWBS. The two pulses are further split into first and second pairs of pulses and are caused to propagate in opposite directions through a fiber optic interferometer loop and are recombined upon exiting the loop. The recombined pulses are caused to pass through a &pgr; phase modulator which modulates one of the two pulses. The output is then introduced to a balanced detector where the detected signal of the two is averaged such that GAWBS noise is cancelled.