Quantum Noise Reduction in KAGRA

Ray-Kuang Lee^1*

¹Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan

* Presenter:Ray-Kuang Lee, email:rklee@ee.nthu.edu.tw

As the chief for KAGRA Squeezing Subsystem (SQZ), leading the quantum noise reduction team for KAGRA for the 5th (tentatively in 2027-2028) and 6th observation runs,I will introduce the purpose and scope of SQZ, as well as the target installation time. At the same time, our experimental progress in implementation of squeezing technologies both in NTHU (National Tsing Hua University) and in NAOJ (National Astronomical Observatory, Japan) will be reported. Preliminary testing on our home-made vOPO (in-vacuum optical parametric oscillator) shows nearly 7 dB squeezing (at 2.5 MHz) and nearly 8 dB squeezing (at 100 kHz) at the ATC clean booth in NAOJ.

Keywords: Gravitational Wave, Gravitational Wave Detector, Quantum noise, Squeezing