evanescent field


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evanescent field

In an optical fiber, the light that passes from the core into the cladding. See fiber optics glossary.
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By applying novel concepts, we will decrease the laser linewidth to 1 Hz (Q-factor 10^14), thereby also significantly increasing the intra-cavity intensity and light interaction length, simplify the read-out by reducing the line-width separation between two lasers to the MHz regime, and increase the mode interaction with the environment by either increasing its evanescent field or perpendicularly intersecting a nanofluidic channel with the optical waveguide, thereby allowing for unprecedented sensitivity of optical detection on a microchip.
Due to the evanescent field and two very closed waveguide the signal will be migrate to another waveguide alternately.
1) These sensors operate using evanescent field whispering gallery mode resonant cavities.
Key words: optical fibre, diode-array, interferometer, evanescent field
It can also be used as a cladding layer of an intrinsic fiber sensor using evanescent field excitation.
The 14 papers here describe such applications as evanescent field tapered fiber optic biosensor fabrication and applications in antibody detection and immobilization, Raman amplification for communication systems, Bragg gratings in high birefringence optical fibers, applications of hollow optical fibers in atom optics, physical modeling of ring lasers, optical power budgets, all-fiber devices for optical networks, optical differential phase shift keying, polymer optical fibers, dissipative solitons in polymer systems, pulses in averaged and dispersion-managed systems, gap solitons in hollow core photonic crystal fibers, multilength optical fiber lasers and semiconductor optical amplifier ring lasers, and the impact of aging on reliability in single-mode silica optical fibers.
When the plasmon reaches the tip end, it generates a strong evanescent field within a region on the order of the tip end diameter.
A strong evanescent field induced by surface plasmons can excite a layer of fluorophores that extends up to ~200 nm above a thin metallic film into the liquid sample.
It has been found that the evanescent field absorption has little effect on these modes.
This is an evanescent field that penetrates through the wave guide boundary into the surrounding medium just above the wave guide surface.
Total internal reflection fluorescence microscope (TIRFM), which enables a simultaneous multi-colored lighting and a perfect control of the penetration depth of the evanescent field, regardless of the wavelength used.
An evanescent field is generated at the metal-dielectric interface through interaction of p-polarized light with surface plasmons (oscillating electrons) under a resonance condition.