Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Changdong Tian"'
Autor:
Zhenkai Li, Chunyang Jiang, Kun Wang, Meng Liu, Chuanhao Li, Changdong Tian, Huiyun Zhang, Yuping Zhang
Publikováno v:
Results in Physics, Vol 46, Iss , Pp 106323- (2023)
Multifunctional coding metasurfaces can provide more options for highly integrated terahertz modulators, which has become one of the current research focus. This study proposed a tunable chiral metasurface based on a Dirac semimetal (DSM). Two U-shap
Externí odkaz:
https://doaj.org/article/ec7eeb5da0324dce9c3b5453026ce87e
Publikováno v:
Journal of Lightwave Technology. 26:3225-3233
In this paper, we analyze and optimize the PGC demodulation algorithm for optical interferometers in order to extend its usage in low-cost all digital schemes. In our low-cost system, we choose heterodyne interferometer and direct modulation on Distr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4da8e62f5acf60bfd7c7a7cb2b1409ca
https://doi.org/10.1109/jlt.2008.928926
https://doi.org/10.1109/jlt.2008.928926
Autor:
Zhiguang Dai, Min Zhang, Qingping Shi, Chang Yang, Shan Cao, Yanbiao Liao, Changdong Tian, Kai Wang, Shangran Xie, Fajie Duan
Publikováno v:
SPIE Proceedings.
The phase generated carrier (PGC) arctangent algorithm needs to be compensated when the carrier modulation depth C deviates from 2.63 rad. Parameters measurement error can induce an incomplete compensation in the arctangent algorithm. The demodulatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20c044d54d8ec13d0b99761a0a447092
https://doi.org/10.1117/12.974817
https://doi.org/10.1117/12.974817
Publikováno v:
SPIE Proceedings.
We analyze the transfer factor for phase noise (NTFϕ) of PGC system. According to NTFϕ , we optimize the system phase noise performance by setting proper working point. Since we use hydrophones with the same Distributed Feedback (DFB) laser, the no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d63f580bd15ec328d4ba4fd67da4e240
https://doi.org/10.1117/12.966819
https://doi.org/10.1117/12.966819
Publikováno v:
SPIE Proceedings.
An integrated demodulation system of optical fiber hydrophone array is designed in the paper for the application of oceanic oil exploration. The ch aracteristic of artificial seismic signal, sens ed and collected by pi ezoelectric hydrophone sensor u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9eb3ab8ff17f5dd199209b9e745d3820
https://doi.org/10.1117/12.904035
https://doi.org/10.1117/12.904035
Publikováno v:
SPIE Proceedings.
Phase Generated Carrier (PGC) with directly Frequency Modulation (FM) is one of the most important demodulation methods for optical fiber interferometric sensor system. Previous research has confirmed that system performance using Orthogonal Demodula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f24321e091d4f856fb35655bdf49d8af
https://doi.org/10.1117/12.870378
https://doi.org/10.1117/12.870378
Autor:
Honghua Wang, Changdong Tian, Xiang Zeng, Yanbiao Liao, Liwei Wang, Longjun Huang, Qingping Shi, Huayong Zhang, Qian Tian, Min Zhang
Publikováno v:
2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications.
We present a new Phase Generated Carrier (PGC) demodulating system for optical seismometer and discuss its stability and consistency which is improved by modifying and compensating key parameters. A simple and easy approach to measure key parameters
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6952e314ea74b6abf92b99ac68966051
https://doi.org/10.1117/12.839548
https://doi.org/10.1117/12.839548
Publikováno v:
SPIE Proceedings.
A new demodulation method is proposed to eliminate the light intensity disturbance(LID) due to the Phase Generate Carrier( PGC) modulation method for the optical marine seismometer which is based on the fiber interferometer. A look up table by the us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98bd57046326236626f4f313417e3336
https://doi.org/10.1117/12.834107
https://doi.org/10.1117/12.834107
Autor:
Changdong Tian, Yanbiao Liao, Huayong Zhang, Honghua Wang, Xiang Zeng, Qian Tian, Longjun Huang, Liwei Wang, Qingping Shi, Min Zhang
Publikováno v:
Optical Engineering. 49:024402
An improved demodulation method for the phase-generated carrier (PGC) system by eliminating laser-intensity modulation (LIM) is proposed. The influence of LIM is analyzed theoretically and experimentally. Two parameters are used to describe the effec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fa79bec6c460b6b5941db063e6c870f
https://doi.org/10.1117/1.3294878
https://doi.org/10.1117/1.3294878
Publikováno v:
Journal of Lightwave Technology; 9/15/2008, Vol. 26 Issue 18, p3225-3233, 9p