Generation of squeezed vacuum on cesium D2 line down to kilohertz range<xref rid="cpb_26_12_124206_fn1" ref-type="fn">*</xref> <fn id="cpb_26_12_124206_fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant Nos. 11634008, 61227902, 11574187, and 11674203), the National Key Research and Development Program of China (Grant No. 2017YFA0304500), and the Fund of “1331 Project” Key Subjects Construction of Shanxi Province, China.</p> </fn>

Generation of squeezed vacuum on cesium D2 line down to kilohertz range* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 11634008, 61227902, 11574187, and 11674203), the National Key Research and Development Program of China (Grant No. 2017YFA0304500), and the Fund of “1331 Project” Key Subjects Construction of Shanxi Province, China.

Tian Jian-Feng¹, Zuo Guan-Hua², Zhang Yu-Chi^{2, †}, Li Gang¹, Zhang Peng-Fei¹, Zhang Tian-Cai¹

(color online) (a) Schematic diagram of the experimental setup. ISO: Faraday isolator; PPSM: polarization-preserving single-mode fiber; HWP: half-wave plate; PBS: polarization beam splitter; PD: photodetector. The dash lines indicate the control electronics for the phase of the homodyne detection process. BPF: band-pass filter; ED: envelope detector; LPF: low-pass filter; HV: high-voltage amplifier. (b) Photograph of the OPO and its housing.