Affiliation:
1. CAS Center for Excellence in Ultra-intense Laser Science
2. Shanxi University
Abstract
We experimentally realize the enhancement of six-beam quantum squeezing by utilizing a six-beam phase-sensitive amplifier (PSA) based on cascaded four-wave mixing processes. Compared to the intensity-difference squeezing (IDS) of about 5.03 or 5.09 dB generated by a six-beam phase-insensitive amplifier (PIA), the six-beam IDS generated by the six-beam PSA is enhanced to about 6.64 dB. The intrinsic interference of six-beam PSA induces this enhancement. In addition, we investigate the dependence of IDS generated by the six-beam PSA and PIAs on the powers of two pump beams. The results show that the IDS of six-beam PSA is always better than that of six-beam PIAs. Our scheme may find potential applications in high-precision multi-parameter quantum metrology.
Funder
National Natural Science Foundation of China
Shanghai Municipal Education Commission
Program of Shanghai Academic Research Leader
Basic Research Project of Shanghai Science and Technology Commission
Natural Science Foundation of Shanghai
Minhang Leading Talents
Shanghai Sailing Program
Natural Science Foundation of Chongqing
Shanghai Municipal Science and Technology Major Project
111 Project