Breaking the Speed Limit of Optical Homodyne Measurement by 5 Orders of Magnitude

by Avi Pe'Er

at Physics Colloquium

Tue, 10 Apr 2018, 15:30
Nanotechnology institute building (#51) room 15

Abstract

Homodyne measurement is a corner stone of quantum optics It measures the fundamental variables of quantum electrodynamics the quadratures of light which represent the cosine wave and sine wave components of an optical field and constitute the quantum optical analog of position and momentum Yet standard homodyne which is used to measure the quadrature information suffers from a severe bandwidth limitation: While the bandwidth of optical states can easily span many THz standard homodyne detection is inherently limited to the electrically accessible MHz to GHz range leaving a dramatic gap between the relevant optical phenomena and the measurement capability We recently demonstrated a fully parallel optical homodyne measurement across an arbitrary optical bandwidth effectively lifting the bandwidth limitation completely Using optical parametric amplification which amplifies one quadrature while attenuating the other we could measure quadrature squeezing of 1 7dB below the vacuum level simultaneously across a bandwidth of 55THz I will discuss the broad context of quantum measurement of light and will review our results

Created on 08-04-2018 by Bar Lev, Yevgeny (ybarlev)
Updaded on 08-04-2018 by Bar Lev, Yevgeny (ybarlev)