Results 31 to 40 of about 31,165 (160)

Impact of Humidity on Quartz-Enhanced Photoacoustic Spectroscopy Based CO Detection Using a Near-IR Telecommunication Diode Laser

Sensors, 2016
A near-IR CO trace gas sensor based on quartz-enhanced photoacoustic spectroscopy (QEPAS) is evaluated using humidified nitrogen samples. Relaxation processes in the CO-N2-H2O system are investigated.
Xukun Yin, Lei Dong, Huadan Zheng, Xiaoli Liu, Hongpeng Wu, Yanfang Yang, Weiguang Ma, Lei Zhang, Wangbao Yin, Liantuan Xiao, Suotang Jia   +10 more
doaj   +1 more source

Strategies for achieving high key rates in satellite-based QKD

npj Quantum Information, 2021
Quantum key distribution (QKD) is a pioneering quantum technology on the brink of widespread deployment. Nevertheless, the distribution of secret keys beyond a few 100 km at practical rates remains a major challenge.
Sebastian Ecker, Bo Liu, Johannes Handsteiner, Matthias Fink, Dominik Rauch, Fabian Steinlechner, Thomas Scheidl, Anton Zeilinger, Rupert Ursin   +8 more
doaj   +1 more source

Quartz Enhanced Conductance Spectroscopy for Polymer Nano-Mechanical Thermal Analysis

Applied Sciences, 2020
A fast and highly sensitive polymer nano-mechanical thermal analysis method for determining the melting temperature (Tm) of polymer microwires was proposed.
Shangzhi Li, Bo Sun, Zhijin Shang, Biao Li, Ruyue Cui, Hongpeng Wu, Lei Dong   +6 more
doaj   +1 more source

Performance Improvement of Single-Frequency CW Laser Using a Temperature Controller Based on Machine Learning

Micromachines, 2022
The performance improvement of an all-solid-state single-frequency continuous-wave (CW) laser with high output power is presented in this paper, which is implemented by employing a temperature control system based on machine learning to control the ...
Haoming Qiao, Weina Peng, Pixian Jin, Jing Su, Huadong Lu   +4 more
doaj   +1 more source

A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay

Sensors, 2022
A free-induction-decay (FID) type optically-pumped rubidium atomic magnetometer driven by a radio-frequency (RF) magnetic field is presented in this paper.
Lulu Zhang, Yongbiao Yang, Ni Zhao, Jun He, Junmin Wang   +4 more
doaj   +1 more source

Measurement of Stokes-operator squeezing for continuous-variable orbital angular momentum

Scientific Reports, 2017
We demonstrate experimentally a measurement scheme for the Stokes operators for the continuous-variable squeezed states of orbital angular momentum (OAM).
Jun Guo, Chunxiao Cai, Long Ma, Kui Liu, Hengxin Sun, Jiangrui Gao   +5 more
doaj   +1 more source

Laser Spatial Coherence Suppression With Refractive Optical Elements Toward the Improvement of Speckle Reduction by Light Pipes

IEEE Access, 2019
We study laser speckle reduction by light pipes, and we propose a new method to improve its efficiency. Proof-of-concept refractive optical elements (ROEs) with a staircase-like structure are introduced before a holographic diffuser to split a laser beam
Zhaomin Tong, Changyuan Sun, Yifei Ma, Mei Wang, Suotang Jia, Xuyuan Chen   +5 more
doaj   +1 more source

Experimental demonstration of multiparty quantum secret sharing and conference key agreement

npj Quantum Information, 2023
Quantum secret sharing (QSS) and conference key agreement (CKA) provide efficient encryption approaches for realizing multi-party secure communication, which are essential components of quantum networks. In this work, a practical, scalable, verifiable (k,
Shuaishuai Liu, Zhenguo Lu, Pu Wang, Yan Tian, Xuyang Wang, Yongmin Li   +5 more
doaj   +1 more source

Improving the Signal-to-Noise Ratio of Photonic Frequency Conversion from 852 nm to 1560 nm Based on a Long-Wavelength Laser-Pumped PPLN Waveguide Module

Photonics, 2022
The storage wavelength of quantum nodes based on atomic systems does not match the wavelength of optical fiber communication, which requires the establishment of an efficient conversion system between flying bits and storage bits. In this paper, based on
Miao Guo, Kong Zhang, Yunhao Zhang, Jun He, Junmin Wang   +4 more
doaj   +1 more source

Lifetime Measurement of Cesium Atoms Using a Cold Rydberg Gas

Applied Sciences, 2022
The lifetimes of nS1/2 and nD5/2 (n = 60–83) cesium Rydberg states are measured accurately in a magneto-optical trap using the field ionization technique and analyzed with the existing theoretical model. The room temperature blackbody radiation (BBR) and
Rong Song, Jingxu Bai, Yuechun Jiao, Jianming Zhao, Suotang Jia   +4 more
doaj   +1 more source