3D silicon neural probe with integrated optical fibers for optogenetic modulation

Lab on a Chip ◽  
2015 ◽  
Vol 15 (14) ◽  
pp. 2939-2949 ◽  
Author(s):  
Eric G. R. Kim ◽  
Hongen Tu ◽  
Hao Luo ◽  
Bin Liu ◽  
Shaowen Bao ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Neural Modulation ◽  
Integrated Optical ◽  
Neural Probe

Optogenetics is a powerful modality for neural modulation that can be useful for a wide array of biomedical studies.

scholarly journals Fiber-Optic Based Smart Textiles for Real-Time Monitoring of Breathing Rate

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3408
Author(s):  
Aizhan Issatayeva ◽  
Aidana Beisenova ◽  
Daniele Tosi ◽  
Carlo Molardi
Keyword(s):  
Optical Fibers ◽  
Mobile Application ◽  
Fiber Optic ◽  
Breathing Pattern ◽  
Wavelength Shift ◽  
Biophysical Parameters ◽  
Integrated Optical ◽  
Respiratory Behavior ◽  
Fbg Sensors ◽  
Widespread Interest

Wearable light textiles are gaining widespread interest in application for measurement and monitoring of biophysical parameters. Fiber optic sensors, in particular Bragg Grating (FBG) sensors, can be a competitive method for monitoring of respiratory behavior for chest and abdomen regions since the sensors are able to convert physical movement into wavelength shift. This study aims to show the performance of elastic belts with integrated optical fibers during the breathing activities done by two volunteers. Additionally, the work aims to determine how the positions of the volunteers affect the breathing pattern detected by optical fibers. As a reference, commercial mobile application for sensing vibration is used. The obtained results show that the FBGs are able to detect chest and abdomen movements during breathing and consequently reconstruct the breathing pattern. The accuracy of the results varies for two volunteers but remains consistent.

Integrated Fiber Optic Sensors For Nondestructive Characterization Of Concrete Structures

1997 ◽  
Vol 503 ◽  
Author(s):  
F. Ansari
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Optical Fiber Sensor ◽  
Fiber Optic Sensors ◽  
Fiber Sensors ◽  
Fully Integrated ◽  
Integrated Optical ◽  
Concrete Elements

ABSTRACTIt is possible to monitor the initiation and progress of various mechanical or environmentally induced perturbations in concrete elements by way of fully integrated optical fiber sensors. Geometric adaptability and ease by which optical fibers can be embedded within concrete elements has led to the development of a number of innovative applications for concrete elements. This article is intended for a brief introduction into the theories, principles, and applications of fiber optic sensors as they pertain to applications in concrete.. However, due to the fact that the transduction mechanism in optical fibers is invariant of the materials employed, the principles introduced here also correspond to other structural materials. The only application related differences among various materials pertain to sensitivity and choice of optical fiber sensor types.

Self-monitoring ‘SMART’ (RE)Ba2Cu3O7−xconductor via integrated optical fibers

2017 ◽  
Vol 30 (11) ◽  
pp. 114002 ◽  
Author(s):  
Federico Scurti ◽  
Srivatsan Sathyamurthy ◽  
Martin Rupich ◽  
Justin Schwartz
Keyword(s):  
Optical Fibers ◽  
Self Monitoring ◽  
Integrated Optical

A SU-8/PDMS Hybrid Microfluidic Device with Integrated Optical Fibers for Online Monitoring of Lactate

2005 ◽  
Vol 7 (4) ◽  
pp. 323-329 ◽  
Author(s):  
Min-Hsien Wu ◽  
Haoyuan Cai ◽  
Xia Xu ◽  
Jill P. G. Urban ◽  
Zhan-Feng Cui ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Microfluidic Device ◽  
Online Monitoring ◽  
Integrated Optical

Coupling. Theory of Coupling Loss of an Ion Exchanged Multimode Channel Waveguide to Optical Fibers

1984 ◽  
Vol 5 (3) ◽  
Author(s):  
J. Čtyroký
Keyword(s):  
Optical Fibers ◽  
Single Channel ◽  
Channel Waveguide ◽  
Coupling Loss ◽  
Graded Index ◽  
Efficient Calculation ◽  
Integrated Optical ◽  
Optic Approximation ◽  
Potential Applicability ◽  
Theoretical Insight

SummaryThe potential applicability of multimode integrated optical branching waveguides and couplers is limited primarily by their coupling loss to optical fibers. To get a reasonably detailed theoretical insight, the fiber-to- fiber coupling loss of a section of a multimode channel waveguide fabricated, e.g., by ion exchange in a glass substrate is calculated using a ray-optic approximation. An approach of the length-averaged coupling loss results in a simple and efficient calculation procedure which enables one to optimize the parameters of a channel waveguide for minimum coupling loss. Coupling losses as low as 2 dB and 0.25 dB can be obtained for single channel and sandwich structures, respectively, coupled to standard graded-index fibers.

scholarly journals Plasma Synthesis of Rare Earth Doped Integrated Optical Waveguides

1995 ◽  
Vol 392 ◽  
Author(s):  
S. Raoux ◽  
S. Anders ◽  
K. M. Yu ◽  
I. C. Ivanov ◽  
I. G. Brown
Keyword(s):  
Optical Fibers ◽  
Optical Waveguides ◽  
Plasma Deposition ◽  
Planar Waveguides ◽  
Plasma Synthesis ◽  
Erbium Ions ◽  
Integrated Optical ◽  
Form Compound ◽  
Cathodic Arc ◽  
Integrated Optical Waveguides

AbstractWe describe a novel means for the production of optically active planar waveguides. The technique makes use of a low energy plasma deposition. Cathodic-arc-produced metal plasmas are used for the metallic components of the films and gases are added to form compound films. Here we discuss the synthesis of A12-xErxO3 thin films. The erbium concentration (x) can vary from 0 to 100% and the thickness of the film can be from Angstroms to microns. In such material, at high active center concentration (x=l% to 20%), erbium ions give rise to room temperature 1.53μm emission which has minimum loss in silica-based optical fibers. With this technique, multilayer integrated planar waveguide structures can be grown, such as Al2O3/Al2-xErO3/A12O3/Si, for example.

Potential Application of Bi(Pb)-Ca-Sr-Cu-O Glasses for Preparation of Integrated Optical Fibers

1989 ◽  
Vol 172 ◽  
Author(s):  
Haixing Zheng ◽  
J. D. Mackenzie
Keyword(s):  
Optical Fibers ◽  
Nonlinear Optical ◽  
Glass Fibers ◽  
High Temperature Superconductors ◽  
Optical Modulator ◽  
Infrared Transmission ◽  
Fiber System ◽  
Nonlinear Optical Susceptibility ◽  
Optical Susceptibility ◽  
Integrated Optical

AbstractThe infrared transmission, and possible high nonlinear optical susceptibility of Bi(Pb)-Ca- Sr-Cu-O glasses as well as their being the precursors for high temperature superconductors make them potential materials for integrated optical fibers. In this work, the glass formation and the fabrication of glass fibers have been investigated. The properties of the glasses have been studied. The infrared cutoff of the glasses is above 7 μm, and a high refractive index (˜ 2.9) and a high density (˜ 6 g/cm3) indicate the possible high nonlinear optical susceptibility. After being heat treated at high temperatures, the glasses become superconductors which show the response to the optical radiation due to the bolometric effect. Fabrication of an integrated optical fiber system incorporating the transmitting medium, optical modulator and detectors is possible.

Passive and active data porting to composite integrated optical fibers via integrated optics

2008 ◽  
Author(s):  
M. E. Teitelbaum ◽  
D. J. O'Brien ◽  
E. D. Wetzel ◽  
K. W. Goossen
Keyword(s):  
Integrated Optics ◽  
Optical Fibers ◽  
Integrated Optical ◽  
Active Data
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