Accession Number : ADA257065
Title : Interferometric Measurement with Squeezed Light
Descriptive Note : Annual rept.
Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
Personal Author(s) : Haus, Hermann A
Report Date : 08 Oct 1992
Pagination or Media Count : 6
Abstract : Squeezed vacuum injected into the 'unused' port of a phase measurement interferometer reduces the noise of the sensor below the shot noise level. Ever since our proposal to generate squeezed vacuum in an optical fiber ring using optical pulses for enhanced Kerr nonlinearity, while saving the pump power for local oscillator, we have been pursuing the goal of utilizing such radiation in a dependable way for improvements in the signal to noise ratio of optical measurements. The research calls for advances in the quantum theory of radiation. The ultimate goal is to use solitons for squeezing, because they offer a higher degree of shot-noise reduction. Thus the quantum theory of solitons needs attention. Further, the use of pulses may lead to nonlinear effects in the sensor utilizing the squeezed radiation. This calls for an investigation of such effects. Guided Acoustic Wave Brillouin Scattering (GAWBS) discovered by the IBM group can introduce sufficient classical noise to destroy the squeezing and thus deserves special attention. This GAWBS noise is convolved into the measurement frequency-window by the (square law) optical detector.
Descriptors : *LIGHT , *INTERFEROMETRY , RADIATION , NOISE REDUCTION , SOLITONS , OPTICAL DETECTORS , ACOUSTIC WAVES , SIGNAL TO NOISE RATIO
Subject Categories : Acoustics
Distribution Statement : APPROVED FOR PUBLIC RELEASE