Results 91 to 100 of about 405,286 (224)

New multiplexing scheme for monitoring fiber optic Bragg grating sensors in the coherence domain

, 1997
A new multiplexing scheme for monitoring fiber optic Bragg gratings in the coherence domain has been developed. Grating pairs with different grating distances are distributed along a fiber line, and interference between their reflections is monitored ...
Usbeck, K., Willsch, R., Ecke, W., Dakin, J.P., Schauer, J., Rothardt, M.   +5 more
core   +2 more sources

Measurement of Viscoelasticity of Sodium Alginate by Fibre Bragg Grating

Proceedings, 2019
A novel sensor for measuring viscoelastic properties of sodium alginate (SA) in distilled water of concentration (1.0, 1.5, 2.0, 2.5, and 3.0 w/w%) has been tested. The sensor used is an FBG (Fiber Bragg Grating) fibre optic sensor.
Leonardo Binetti, Alicja Stankiewicz, Lourdes Alwis   +2 more
doaj   +1 more source

Bronchoscope Tip Localization With Learned Airway Constraints and an Open Source Simulator

Advanced Intelligent Systems, EarlyView.
BronchoLoc addresses feature‐poor bronchoscopic imaging by combining monocular video with a preoperative CT graph to estimate 3D camera location. A local tracker identifies candidate branches, while a sequence‐aware global module refines the trajectory. Demonstrating sub‐centimeter accuracy across synthetic and phantom datasets, this framework advances
Emanuele Nicotra, James Davies, Bibhu Sharma, Adrienne Ji, Kefan Zhu, Phuoc Thien Phan, Nigel H. Lovell, Thanh Nho Do   +7 more
wiley   +1 more source

The Use of Fibre Bragg Grating To Monitor the Early Age Curing Temperature of Cement Paste

Electronic Journal of Structural Engineering, 2013
In this paper, a Fibre Bragg Grating (FBG) is used to monitor the early age curing temperature of cement paste. The FBG is inscribed by a Continuous Wave (CW) 244nm argon ion laser in the photosensitive fibre.
L. DONG, Z. IBRAHIM, Z. ISMAIL
doaj   +1 more source

Shape Sensing, Mapping, and Obstacle Avoidance of the Continuum Manipulator in Confined Environments

Advanced Intelligent Systems, EarlyView.
An integrated sensing framework combines capacitive sensors, IMU, and laser array sensor. The shape reconstruction is finished by backpropagation neural network. Accurate shape estimation (relative error of 1.04%) is maintained under a 110 g tip load, while a miniaturized VL6180X array enables local environmental reconstruction and reactive obstacle ...
Pengyuan Wang, Shi Qiao, Zhaoye Dong, Yuxuan Wang, Runte Song, Fengguang Jia, Shu Wang, Yongchang Zhang, Zhiguang Xing, Jianwen Zhao   +9 more
wiley   +1 more source

Magnetically programmable fibre Bragg gratings

Electronics Letters, 1998
An attractive force between magnetic poles was utilised to produce significant wavelength shifts in fibre Bragg gratings. Programmable magnets were used to controllably strain and shift the wavelength of the grating by more than 15 nm. The wavelength tuning is fast and the device requires no power to maintain the shifted wavelengths.
S. Jin, R.P. Espindola, H. Mavoori, T.A. Strasser, J.J. DeMarco   +4 more
openaire   +1 more source

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

Dispersion-Tuned Mode-Locked Laser for Swept Source OCT at 850 nm Using a cFBG and the Pulse Modulation Technique

IEEE Photonics Journal
In this paper, the feasibility of employing a fast intensity modulator and a chirped fibre Bragg grating to build a dispersion-tuned mode-locked swept laser (DTML-SS) for OCT at 850 nm is evaluated.
Rene Riha, Alejandro Martinez Jimenez, Gopika Venugopal, Marie Klufts, Robert Huber, Adrian Podoleanu   +5 more
doaj   +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