Help


[permalink] [id link]
+
Page "Step-index profile" ¶ 1
from Wikipedia
Edit
Promote Demote Fragment Fix

Some Related Sentences

step-index and fiber
The advantage of the graded-index fiber compared to multimode step-index fiber is the considerable decrease in modal dispersion.
The S-G-S mode scrambler is actually an assembly, a fusion-spliced concatenation of a step-index profile, a graded-index profile and another step-index profile fiber.
Step Index with Bend mode scramblers are created simply by routing a specially designed step-index multimode fiber through a series of small radius bends, or by compressing fiber against surfaces with specific roughness.
For step-index multimode fiber, the acceptance angle is determined only by the indices of refraction of the core and the cladding:
For an optical fiber, a step-index profile is a refractive index profile characterized by a uniform refractive index within the core and a sharp decrease in refractive index at the core-cladding interface so that the cladding is of a lower refractive index.
To determine the number of modes in a step-index fiber, the V number needs to be determined: where is the wavenumber, is the fiber's core radius, and and are the refractive indices of the core and cladding, respectively.

step-index and is
The mode volume M is approximately given by and, respectively for step-index and power-law index profile fibers, where g is the profile parameter, and V is the normalized frequency, which must be greater than 5 for this approximation to be valid.
In step-index guides, single-mode operation occurs when the normalized frequency, V, is less or equal than 2. 405.
The step-index profile is used in most single-mode fibers and some multimode fibers.

step-index and by
However, no matter how exotic the method of propagation, and no matter the material system, the sole driver for most that time has been the transportation of light from one point to another, whether by step-index confinement determined by simple Fresnel reflections or by coherent Fresnel reflections in bandgap fibers such as Bragg fibers.

step-index and .
In the limit of infinite, the profile becomes a step-index profile.
The step-index profile corresponds to a power-law index profile with the profile parameter approaching infinity.
These fibers are typically step-index fibers.
Many other practical design benefits include broader photonic bandgaps in diffraction based propagating waveguides and reduced bend losses, important for achieving structured optical fibers with propagation losses below that of step-index fibers.

fiber and is
Our new large-package ring twister for glass fiber yarns is performing well in our customers' mills.
The nuclei of these fibers, as is shown in Figures 3 and 4, showed remarkable proliferation and were closely approximated, forming a chainlike structure at either the center or the periphery of the fiber.
For the same reason, the output fiber plate is planoconcave, its exposed flat side permitting contact photography if a permanent record is desired.
Hence, the Af factor for the output fiber coupler is Af.
This relatively high value is probably due to the small fiber diameters increasing the number of internal reflections.
The packing efficiency, F.R., of fiber plates did not receive much attention in the literature, probably as it is high for the larger fibers generally used, until rather recently.
Thus, the combined efficiency of the elements replaced by the two fiber plates ( with a combined efficiency of 0.25 ) is 0.043 or about six times less than that of the two fiber plates.
Including the brightness gain Af due to the Af area demagnification, the overall gain of a fiber coupled double stage image intensifier is: Af.
Agriculture also called farming or husbandry is the cultivation of animals, plants, fungi, and other life forms for food, fiber, biofuel and other products used to sustain life.
An axon ( also known as a nerve fiber ) is a long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body.
The fiber was originally used for making twines and ropes ; now most abacá is pulped and used in a variety of specialized paper products including tea bags, filter paper and banknotes.
It is classified as a hard fiber, along with coir, henequin and sisal.
Most abacá fiber is pulped and processed into specialty paper used in tea bags, vacuum bags, currency, and more.
Abacá fiber was once used primarily for rope, but this application is now of minor significance.
Agar-agar is approximately 80 % fiber, so it can serve as an intestinal regulator.
The sector is beginning to improve following installation of a 22 Mbit / s fiber optic international link, a vast improvement over the previous 128 kbit / s link.
They send these signals by means of an axon, which is a thin protoplasmic fiber that extends from the cell body and projects, usually with numerous branches, to other areas, sometimes nearby, sometimes in distant parts of the brain or body.
Most of the space in the brain is taken up by axons, which are often bundled together in what are called nerve fiber tracts.
Nata de coco is high in dietary fiber and low in cholesterol and fat.
The original meaning of the word " neuron " in Greek is " vegetable fiber " and recent research has shown that most of the intraorganismic plant communication processes are neuronal-like.
Plastics are made from fossil hydrocarbons, and carbon fiber, made by pyrolysis of synthetic polyester fibers is used to reinforce plastics to form advanced, lightweight composite materials.
Carbon fiber is made by pyrolysis of extruded and stretched filaments of polyacrylonitrile ( PAN ) and other organic substances.
The first of these is the appearance of bark-bearing trees ( and in particular the evolution of the bark fiber lignin ).

fiber and characterized
The output of a PM fiber is typically characterized by its polarization extinction ratio ( PER )— the ratio of correctly to incorrectly polarized light, expressed in decibels.
Brittle materials, such as concrete and carbon fiber, are characterized by failure at small strains.
This fiber, which handles similarly to normal textile apparel fibers, is characterized by its excellent resistance to heat, as it neither melts nor ignites in normal levels of oxygen.
* Cultivars primarily cultivated for their fiber, characterized by long stems and little branching.

0.473 seconds.