Prof. Dr. Dong Hou
Scholl of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
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Academic Career Length
14Years (2013-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
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Journal Article
A practical model of quartz crystal microbalance (QCM) is presented, which considers both the Gaussian distribution characteristic of mass sensitivity and the influence of electrodes on the mass sensitivity. The equivalent mass sensitivity of 5 MHz and 10 MHz AT-cut QCMs with different sized electrodes were calculated according to this practical model. The equivalent mass sensitivity of this practical model is different from the Sauerbrey’s mass sensitivity, and the error between them increases sharply as the electrode radius decreases. A series of experiments which plate rigid gold film onto QCMs were carried out and the experimental results proved this practical model is more valid and correct rather than the classical Sauerbrey equation. The practical model based on the equivalent mass sensitivity is convenient and accurate in actual measurements.
12 December 2017 in Journal of Physics Communications
Journal Article
We have recently presented a technique for measuring unknown microwave (MW) fields based on Rabi resonances induced by the interaction of atoms with a phase-modulated MW field. The single-peak feature of the measurement model makes the technique a valuable tool for simple and fast field measurement. Here we demonstrated a detailed investigation of Rabi resonance of Cs atoms inside a vapour cell. For illustration, we used the Rabi resonance-based field detection technique to determine the field strength inside an X-band cavity for applied power in the range of −21 dBm to 20 dBm. The difference between the practical measurement and the simulation was approximately about 3% for an applied power of 20 dBm, and a higher accuracy could be expected for a larger power input.
23 August 2017 in Optics Express
Journal Article
FSFuyu Sun
Fuyu Sun
Dong HouDZDanian Zhang
Danian Zhang
JTJie Tian
Jie Tian
JHJianguo Hu
Jianguo Hu
SCShijun Chen
Shijun Chen
+1
We demonstrate femtosecond-level timing fluctuation suppression in indoor atmospheric comb-based frequency transfer with a passive phase conjunction correction technique. Timing fluctuations and Allan deviations are both measured to characterize the excess frequency instability incurred during the frequency transfer process. By transferring a 2 GHz microwave over a 52-m long free-space link in 5000 s, the total root-mean-square (RMS) timing fluctuation was measured to be about 280 fs with a fractional frequency instability on the order of 3 × 10−13 at 1 s and 6 × 10−17 at 1000 s. This atmospheric comb-based frequency transfer with passive phase conjunction correction can be used to build an atomic clock-based free-space frequency transmission link because its instability is less than that of a commercial Cs or H-master clock.
10 January 2020 in Scientific Reports
Journal Article
Deep ultraviolet lasers based on the phenomenon of mode-locking have been used widely in many areas in recent years, for example, in semiconductors, the environment and biomedicine. In the development of a mode-locked deep ultraviolet laser, one of the most important aspects is to optimize the multiple parameters of the complex system. Traditional optimization methods require experimenters with more optimization experience, which limits the wide application of the lasers. In this study, we optimize the deep ultraviolet mode-locked laser system using an online neural network to solve this problem. The neural network helps us control the position of the crystal, the length of the cavity, the position of the focusing lens and the temperature of the frequency doubling crystal. We generate a deep ultraviolet mode-locked laser with a power of 18 mW and a spectral center at 205 nm. This result is greatly improved compared to previous results with the same pump power. This technology provides a universal solution to multiparameter problems in the optimization of lasers.
20 August 2014 in Optics Letters
Journal Article
We demonstrate a phase conjugation frequency dissemination scheme using an optical frequency comb as a coherent source. After the comb’s radio frequency is detected by a photodiode, its repetition frequency’s first harmonic is used to modulate a laser, which is injected into a 10 km fiber link. The round-trip signal is mixed with the triple harmonic thereby obtaining a signal that is immune to the fluctuation at the remote end. This method results in frequency instability of at . Our scheme provides a potential approach to deliver coherent frequencies to many places with high stability.
16 December 2013 in Scientific Reports
Journal Article
Dong HouXXXiaopeng Xie
Xiaopeng XieYZY. L. Zhang
Y. L. Zhang
JWJ. T. Wu
J. T. Wu
ZCZ. Y. Chen
Z. Y. Chen
JZJianye Zhao
Jianye ZhaoOptical frequency combs (OFCs), based on mode-locked lasers (MLLs), have attracted considerable attention in many fields over recent years. Among the applications of OFCs, one of the most challenging works is the extraction of a highly stable microwave with low phase noise. Many synchronisation schemes have been exploited to synchronise an electronic oscillator with the pulse train from a MLL, helping to extract an ultra-stable microwave. Here, we demonstrate novel wideband microwave extraction from a stable OFC by synchronising a single widely tunable optoelectronic oscillator (OEO) with an OFC at different harmonic frequencies, using an optical phase detection technique. The tunable range of the proposed microwave extraction extends from 2 GHz to 4 GHz and in a long-term synchronisation experiment over 12 hours, the proposed synchronisation scheme provided a rms timing drift of 18 fs and frequency instabilities at 1.2 × 10−15/1 s and 2.2 × 10−18/10000 s.
About Me
Dong Hou received a B.Sc. degree in electronic engineering from the North China University of Technology, Beijing, China, in 2004, and a Ph.D. in electronic engineering from Peking University, Beijing, in 2012. From 2004 to 2007, he worked for E-world and Lenovo Corporations, respectively, as a senior electronic engineer. From 2012 to 2014, he was a postdoctoral fellow at Peking University, Beijing, China. From 2014 to 2015, he was a postdoctoral research associate at the University of Colorado Boulder and the Joint Institute for Laboratory Astrophysics (JILA), Boulder, USA. From 2015 to 2016, he was a senior visiting scholar at the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea. He is now an associate professor of the School of Automation Engineering at the University of Electronic Science and Technology of China, Chengdu, China. He is the author or co-author of more than 50 journal articles and 30 conference papers. His current research interests include highly stable time-frequency transfer over fiber and free-space links, timing jitter/phase noise measurement of mode-locked lasers, and stabilization techniques for optical frequency comb with ultra-low noise.