Results 91 to 100 of about 849,567 (246)

Ultrafast RF Spectrum Analyzer Assisted by Optical Short‐Time Fourier Transform

Advanced Physics Research, EarlyView.
We present Recent efforts in an ultrafast RF spectrum analyzer based on the short‐time Fourier transform (STFT) at over 10 MHz frame rate and over 40GHz bandwidth to improve performance and support applications. All these efforts could inspire more innovative applications of temporal imaging modalities in the future.
Liao Chen, Yufan Du, Rongwu Liu, Chi Zhang, Xinliang Zhang   +4 more
wiley   +1 more source

Fluorene‐based blue emitters: On the path to electrically pumped organic lasers

FlexMat, EarlyView.
Electrically pumped efficient operation remains unrealized, a major challenge in optoelectronics. Fluorene‐based blue‐emitting semiconductors are promising gain media, thanks to their structural tunability and favorable emission properties. This review summarizes recent advances, highlights their reliability and versatility in lasing, and outlines key ...
Yong Yan, Hao Li, Mengna Yu, Huiyin Wang, Jiangqiang He, Menghan Wu, Quanyou Feng, Linghai Xie   +7 more
wiley   +1 more source

Controllable growth of two‐dimensional molecular crystals for high‐performance hybrid heterostructure imaging device

InfoMat, EarlyView.
Layer‐controlled two‐dimensional perylene‐derivative molecular crystals grow by van der Waals vapor‐phase epitaxy and show near‐unity photoluminescence quantum yields. In hybrid structures with TMDCs, the carrier relaxation can be tuned from charge transfer to Förster resonance energy transfer.
Huijuan Zhao, Zijie Lai, Xiaoyu Xie, Bihua Xie, Hao Hong, Zemin Tang, Xiangbin Shen, Yi Shi, Kaihui Liu, Daowei He, Wei Huang, Xinran Wang, Li Gao   +12 more
wiley   +1 more source

Bragg grating based integrated photonic Hilbert transformers

, 2013
Planar Bragg grating based photonic Hilbert transformers are experimentally demonstrated in this work. Planar Bragg gratings are utilized to implement a general Hilbert transform, a fractional order Hilbert transform and terahertz bandwidth Hilbert ...
Smith, P.G.R., Sima, C., Gates, J.C., Zervas, M.N.   +3 more
core   +2 more sources

Study on Deformation Measurement in Surrounding Rock Failure Model Test of Deep Roadway

工程科学与技术, 2010
:In order to accurately measure the internal deformation in geo-mechanical model test, Based on surrounding rock failure model test of deep roadway, fiber Bragg grating strain sensors and grating ruler displacement sensors were laid in the model to ...
Liu Dejun, Zhang Qiangyong, Chen Xuguang, Lin Bo, Zhang Ning   +4 more
doaj  

Optical Gaussian Notch Filter Based on Periodic Microbent Fiber Bragg Grating

IEEE Photonics Journal, 2014
In this paper, we demonstrated an optical notch filter constructed from a periodic microbent fiber Bragg grating attained by using two copper-wire-wound slabs.
M. M. Ali, K. S. Lim, A. Becir, M. H. Lai, H. Ahmad   +4 more
doaj   +1 more source

1 W Single‐Mode Large‐Area Edge‐Emitting Laser via Non‐Hermitian Spatial Mode Filtering

Laser &Photonics Reviews, EarlyView.
We demonstrate a non‐Hermitian spatial mode filtering approach for achieving high‐power single‐mode operation in large‐area edge‐emitting laser diodes. By symmetrically coupling passive filter arrays to the main lasing waveguide, higher‐order transverse modes are effectively suppressed while preserving the fundamental mode.
Ece Karabey, Babak Olyaeefar, Mohammadmahdi Alizadeh, Ramy El‐Ganainy, Abdullah Demir   +4 more
wiley   +1 more source

Dual Measurements of Pressure and Temperature With Fiber Bragg Grating Sensor

Al-Khawarizmi Engineering Journal, 2015
The fiber Bragg grating (FBG) technology has been rapidly applied in the sensing technology field. In this work, uniform FBG was used as pressure sensor based on measuring related Bragg wavelength shift.
Tahreer S. Mansour, Fahad M. Abdulhussein   +1 more
doaj  

Analysis of The Effect Caused by Vibration Due to Fiber Bragg Grating Sensor Wavelength

Jurnal Jaringan Telekomunikasi
It is undeniable that fiber cables that are routed underground using the ducting method are susceptible to interference due to external factors such as vibration, especially if the soil is susceptible to vibration activity such as natural factors ...
Firda Wahyuningtyas, Amalia Eka Rakhmania, Yoyok Heru Prasetyo Isnomo   +2 more
doaj   +1 more source

Parallel Multi‐Target Detection for Quantum LiDAR

Laser &Photonics Reviews, EarlyView.
Parallel multi‐target detection is achieved in quantum LiDAR with a single‐pixel quantum readout. Direction and distance information are extracted together, allowing multiple objects to be distinguished under noisy low‐light conditions and pointing to a new strategy for scan‐free quantum remote sensing.
Junyeop Kim, Dongjin Lee, Woncheol Shin, Yeoulheon Seong, Heedeuk Shin   +4 more
wiley   +1 more source