Generation of strongly squeezed states
We develop sources for highly squeezed states of light to improve precise metrological applications. We hold the world record for squeezed light states at a level of 15 dB.
In 2016 we have generated the most strongly squeezed laser light ever with a squeezing level of 15 dB. We have surpassed our own world record by far. The record-breaking light enables a new method to determine the quantum efficiency of photodetectors. The novel technique is independent of established methods and does not require laboriously calibrating reference light sources.