High-reflectivity fiber-optic bandpass filter designed by use of the iterative solution to the Gel’fand–Levitan–Marchenko equations

1998 ◽  
Vol 23 (12) ◽  
pp. 933 ◽  
Author(s):  
J. Skaar ◽  
B. Sahlgren ◽  
P.-Y. Fonjallaz ◽  
H. Storøy ◽  
R. Stubbe
Keyword(s):  
Bandpass Filter ◽  
Fiber Optic ◽  
Iterative Solution ◽  
High Reflectivity

A Tunable Fiber-Optic Bandpass Filter Based on Polished Fiber to Planar Waveguide Coupling Techniques

1995 ◽  
Vol 1 (3) ◽  
pp. 271-277 ◽  
Author(s):  
K. McCallion ◽  
S. Creaney ◽  
I. Madden ◽  
W. Johnstone
Keyword(s):  
Planar Waveguide ◽  
Bandpass Filter ◽  
Fiber Optic ◽  
Coupling Techniques ◽  
Waveguide Coupling

Experimental and Theoretical Investigation of an In-Line Fiber-Optic Bandpass Filter

1997 ◽  
Vol 3 (2) ◽  
pp. 154-161 ◽  
Author(s):  
Krassimir P Panajotov ◽  
Elka I Karakoleva ◽  
Andrey Tz Andreev ◽  
Blagovesta S Zafirova
Keyword(s):  
Theoretical Investigation ◽  
Bandpass Filter ◽  
Fiber Optic

In-line hollow-core fiber-optic bandpass filter

2021 ◽  
Author(s):  
Xiong Daiqi ◽  
WU XU ◽  
Muhammad Rosdi Abu Hassan ◽  
Trivikramarao Gavara ◽  
Wonkeun Chang
Keyword(s):  
Bandpass Filter ◽  
Fiber Optic ◽  
Hollow Core ◽  
Core Fiber

Tunable in-line fiber-optic bandpass filter

1994 ◽  
Vol 19 (8) ◽  
pp. 542 ◽  
Author(s):  
K. McCallion ◽  
W. Johnstone ◽  
G. Fawcett
Keyword(s):  
Bandpass Filter ◽  
Fiber Optic

Imaging and diffraction modes in Scanning Transmission Electron Microscopy

1986 ◽  
Vol 44 ◽  
pp. 684-687
Author(s):  
J. M. Cowley ◽  
R. Glaisher ◽  
J. A. Lin ◽  
H.-J. Ou
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
High Efficiency ◽  
Fiber Optic ◽  
Image Intensifier ◽  
Detector System ◽  
Detector Plane ◽  
Secondary Electrons ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Special Detector

Some of the most important applications of STEM depend on the variety of imaging and diffraction made possible by the versatility of the detector system and the serial nature, of the image acquisition. A special detector system, previously described, has been added to our STEM instrument to allow us to take full advantage of this versatility. In this, the diffraction pattern in the detector plane may be formed on either of two phosphor screens, one with P47 (very fast) phosphor and the other with P20 (high efficiency) phosphor. The light from the phosphor is conveyed through a fiber-optic rod to an image intensifier and TV system and may be photographed, recorded on videotape, or stored digitally on a frame store. The P47 screen has a hole through it to allow electrons to enter a Gatan EELS spectrometer. Recently a modified SEM detector has been added so that high resolution (10Å) imaging with secondary electrons may be used in conjunction with other modes.

Synthesis, performance and growth mechanism of silver nanoparticle coated SERS fiber probe

2019 ◽  
Vol 107 (3) ◽  
pp. 305
Author(s):  
Mengmei Geng ◽  
Yuting Long ◽  
Tongqing Liu ◽  
Zijuan Du ◽  
Hong Li ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Absorption Spectrum ◽  
Reaction Time ◽  
Growth Mechanism ◽  
Fiber Optic ◽  
Fiber Optic Probe ◽  
Visible Absorption ◽  
Fiber Probe ◽  
Surface Enhanced Raman ◽  
Optic Probe

Surface-enhanced Raman Scattering (SERS) fiber probe provides abundant interaction area between light and materials, permits detection within limited space and is especially useful for remote or in situ detection. A silver decorated SERS fiber optic probe was prepared by hydrothermal method. This method manages to accomplish the growth of silver nanoparticles and its adherence on fiber optic tip within one step, simplifying the synthetic procedure. The effects of reaction time on phase composition, surface plasmon resonance property and morphology were investigated by X-ray diffraction analysis (XRD), ultraviolet-visible absorption spectrum (UV-VIS absorption spectrum) and scanning electron microscope (SEM). The results showed that when reaction time is prolonged from 4–8 hours at 180 °C, crystals size and size distribution of silver nanoparticles increase. Furthermore, the morphology, crystal size and distribution density of silver nanoparticles evolve along with reaction time. A growth mechanism based on two factors, equilibrium between nucleation and growth, and the existence of PVP, is hypothesized. The SERS fiber probe can detect rhodamin 6G (R6G) at the concentration of 10−6 M. This SERS fiber probe exhibits promising potential in organic dye and pesticide residue detection.

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