Effects of the asymmetric refractive index change profile on the reflection spectra of multimode fiber Bragg gratings

2005 ◽  
Author(s):  
Hong-Gang Yu ◽  
Yong Wang ◽  
Chun Yang ◽  
Qing-Yang Xu ◽  
Xiao-Le Yang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Refractive Index Change ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Reflection Spectra ◽  
Multimode Fiber ◽  
Index Change

Optical Refractive-Index Sensor Based on Dual Fiber-Bragg Gratings Interposed With a Multimode-Fiber Taper

2007 ◽  
Vol 19 (1) ◽  
pp. 30-32 ◽  
Author(s):  
Li-Yang Shao ◽  
A. Ping Zhang ◽  
Wei-Sheng Liu ◽  
Hong-Yan Fu ◽  
Sailing He
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Refractive Index Sensor ◽  
Multimode Fiber ◽  
Fiber Taper

Tension increase correlated to refractive-index change in fibers containing UV-written Bragg gratings

1995 ◽  
Vol 20 (11) ◽  
pp. 1346 ◽  
Author(s):  
P. Y. Fonjallaz ◽  
F. Cochet ◽  
B. Leuenberger ◽  
H. G. Limberger ◽  
R. P. Salathé
Keyword(s):  
Refractive Index ◽  
Refractive Index Change ◽  
Bragg Gratings ◽  
Index Change ◽  
Tension Increase

scholarly journals Directly photoinscribed refractive index change and Bragg gratings in Ohara WMS-15 glass ceramic

2009 ◽  
Vol 48 (18) ◽  
pp. 3429 ◽  
Author(s):  
Peter A. Krug ◽  
Rodica Matei Rogojan ◽  
Jacques Albert
Keyword(s):  
Refractive Index ◽  
Glass Ceramic ◽  
Refractive Index Change ◽  
Bragg Gratings ◽  
Index Change

scholarly journals Critical angle reflection imaging for quantification of molecular interactions on glass surface

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Guangzhong Ma ◽  
Runli Liang ◽  
Zijian Wan ◽  
Shaopeng Wang
Keyword(s):  
Refractive Index ◽  
Small Molecule ◽  
Molecular Interactions ◽  
Glass Surface ◽  
Critical Angle ◽  
Dynamic Range ◽  
Refractive Index Change ◽  
Label Free ◽  
Index Change ◽  
Sensing Range

AbstractQuantification of molecular interactions on a surface is typically achieved via label-free techniques such as surface plasmon resonance (SPR). The sensitivity of SPR originates from the characteristic that the SPR angle is sensitive to the surface refractive index change. Analogously, in another interfacial optical phenomenon, total internal reflection, the critical angle is also refractive index dependent. Therefore, surface refractive index change can also be quantified by measuring the reflectivity near the critical angle. Based on this concept, we develop a method called critical angle reflection (CAR) imaging to quantify molecular interactions on glass surface. CAR imaging can be performed on SPR imaging setups. Through a side-by-side comparison, we show that CAR is capable of most molecular interaction measurements that SPR performs, including proteins, nucleic acids and cell-based detections. In addition, we show that CAR can detect small molecule bindings and intracellular signals beyond SPR sensing range. CAR exhibits several distinct characteristics, including tunable sensitivity and dynamic range, deeper vertical sensing range, fluorescence compatibility, broader wavelength and polarization of light selection, and glass surface chemistry. We anticipate CAR can expand SPR′s capability in small molecule detection, whole cell-based detection, simultaneous fluorescence imaging, and broader conjugation chemistry.

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