An ultraviolet laser communication system using frequency-shift keying modulation schemeOptoelectronics Letters - Tập 11 - Trang 65-68 - 2015
Di-yong Peng, Jun Shi, Guang-hui Peng, Sha-li Xiao, Shan-he Xu, Shan Wang, Feng Liu
A communication system based on an ultraviolet (UV) laser at 266 nm is presented
to improve the communication distance. The pulse frequency-shift keying (FSK)
modulation scheme is studied and improved in order to reduce the bit error rate
(BER), and is put into practice on a field programmable gate array (FPGA). The
mathematical models of the modulation and demodulation are established. A test
pla... hiện toàn bộ
Double depth-enhanced 3D integral imaging in projection-type system without diffuserOptoelectronics Letters - Tập 11 - Trang 166-169 - 2015
Lei Zhang, Xiao-xue Jiao, Yu Sun, Yan Xie, Shao-peng Liu
Integral imaging is a three dimensional (3D) display technology without any
additional equipment. A new system is proposed in this paper which consists of
the elemental images of real images in real mode (RIRM) and the ones of virtual
images in real mode (VIRM). The real images in real mode are the same as the
conventional integral images. The virtual images in real mode are obtained by
changing t... hiện toàn bộ
Fast event-inpainting based on lightweight generative adversarial netsOptoelectronics Letters - Tập 17 - Trang 507-512 - 2021
Sheng Liu, Haohao Cheng, Shengyue Huang, Kun Jin, Huanran Ye
Event-based cameras generate sparse event streams and capture high-speed motion
information, however, as the time resolution increases, the spatial resolution
will decrease sharply. Although the generative adversarial network has achieved
remarkable results in traditional image restoration, directly using it for event
inpainting will obscure the fast response characteristics of the event camera,
a... hiện toàn bộ
Coherent confocal microscope with a phase-only filter in its extended sourceOptoelectronics Letters - Tập 2 - Trang 104-106 - 2006
Chu-ping Yang
The phase information of an extended source is reconstructed by use of a
two-zone (annular) phase-only filter in a coherent confocal scanning optical
microscope. The dependence of its resolution on its source size is investigated
theoretically by its three-dimensional optical transfer function (3D OTF). The
results show that the resolution is improved, even though the source size is
enlarged.
Optical fiber sensor by cascading long period fiber grating with FBG for double parameters measurementOptoelectronics Letters - Tập 13 - Trang 372-375 - 2017
Wen Zhang, Xiao-ping Lou, Ming-li Dong, Lian-qing Zhu
An optical fiber sensor for strain and temperature measurement based on long
period fiber grating (LPFG) cascaded with fiber Bragg grating (FBG) structure
has been proposed and realized both theoretically and experimentally.
Theoretical analysis shows that two microstructures with similar sensitivities
cannot be used for double parameters measurement. The LPFG is micromachined by
the CO2 laser, an... hiện toàn bộ
Research on optical fiber magnetic field sensors based on multi-mode fiber and spherical structureOptoelectronics Letters - - 2017
Yan Wang, Zheng-rong Tong, Wei-hua Zhang, Pan-pan Luan, Yue Zhao, Li-fang Xue
A magnetic field sensor with a magnetic fluid (MF)-coated intermodal
interferometer is proposed and experimentally demonstrated. The interferometer
is formed by sandwiching a segment of single mode fiber (SMF) between a segment
of multi-mode fiber (MMF) and a spherical structure. It can be considered as a
cascade of the traditional SMF-MMF-SMF structure and MMF-SMF-sphere structure.
The transmissi... hiện toàn bộ
Theoretical study of phase-matching properties for tunable terahertz-wave generation in isotropic nonlinear crystalsOptoelectronics Letters - Tập 3 - Trang 152-156 - 2007
Bo Sun, Jian-quan Yao, Bai-gang Zhang, Tie-li Zhang, Peng Wang
Theoretical investigation of the phase-matching properties for the tunable
coherent terahertz wave generation in the isotropic semiconductor nonlinear
materials of CdTe and GaP is presented according to their optical dispersion
properties, based on a pulsed dual-wavelength KTP-OPO operating near degenerate
point in the process of the difference frequency mixing. The cross-Reststrahlen
band dispers... hiện toàn bộ