Accession Number : ADA292402
Title : Interferometric Measurement with Squeezed Light.
Descriptive Note : Annual technical rept. 1 Feb 94-31 Jan 95,
Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
Personal Author(s) : Haus, Hermann A. ; Bergman, Karen ; Boivin, Luc
PDF Url : ADA292402
Report Date : 14 MAR 1995
Pagination or Media Count : 5
Abstract : The goal of the project is to develop interferometric measurement methods, using squeezed light, with noise levels below the 'standard quantum limit.' The 'standard quantum limit' is the shot noise level. If squeezed radiation is injected into the, normally, unexcited port of a Mach-Zehuder interferometer, the phase shift of the interferometer can be measured in a noise background that is below the shot noise level. In past experiments performed at 1.3 microns wavelength using a nonlinear Sagnac loop, we have demonstrated shot noise reduction of -5.1 dB. In a phase measurement with a Mach-Zehnder interferometer we have achieved a noise level 3 dB below the shot noise level. In this measurement the losses of the bulk- (rather than fiber-) interferometer prevented the full utilization of the 5.1 dB shot noise reduction. It is our present goal to achieve improved noise performance by increased noise reduction below the shot noise level. (MM)
Descriptors : *INTERFEROMETRY, *LIGHT PULSES, *NOISE REDUCTION, LASERS, BACKGROUND NOISE, PHASE SHIFT, SHOT NOISE.
Subject Categories : Optics
Distribution Statement : APPROVED FOR PUBLIC RELEASE