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SEED, an optically bistable device used for photonic switching, constructed of a multiple quantum well biased by an external voltage, which creates an external field that shifts the wavelength of the onset of absorption, varying the transmitted light.
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How does an EMP device effect pacemakers?
How does an Electro magnetic pulse device effect pacemakers
What is the effect of decreasing the incubation time on optical density?
The effect of decreasing incubation time on optical density is that optical density decreases. Incubation time and optical density have a proportional relationship.
What is chemical effect of electricity?
it is electrolysis/ electro dialysis
Which process causes a metal spoon to appear split of broken in a glass of water?
optical effect
What is electron pair?
i wanna know please what is the definition of electro pair effect?
Who formulated the Casimir effect?
The scientific electro-magnet pulse in the brains of infants balls
How much water does an average rainbow hold?
What a charming question! But since the rainbow has no physical presence, it contains nothing. It is just an optical effect. Another optical effect could be that of a shadow, which really has no presence or activity.
What is bidirectional device?
In electronics, bidirectional device is device which can be used by both directions like resistor. It does not effect on characteristics of device if we change the terminals of that device.
What is meant by optical augmentation principle?
Optical Augmentation (OA) is the methods behind detecting optical devices, such as rifle scopes, cameras, binoculars, etc. An active light source is used to illuminate optical devices, which in return give off a "cats-eye" effect, giving away their position.
What is tunnel effect in optical fibers?
You can find the answer in the link, it is in blog.ourfiber.com, a lot of professional article in this blog.
Why is luster a physical property?
Luster is an optical phenomenon, the effect of interaction between light and a crystal.
What is the Optical Circulator in Optical Communication?
Optical circulator is a multi-port optical device with nonreciprocal property. It is based on the nonreciprocal polarization of an optical signal by Faraday effect. When an optical signal is input from any port, it can be output from the next port sequentially with very low loss, and the loss from this port to all other ports is very large, so these ports are not communicating with each other. That means that optical circulator is a three- or four-port optical device designed such that light entering any port exits from the next. If light enters port 1 it is emitted from port 2, but if some of the emitted light is reflected back to the circulator, it does not come out of port 1 but instead exits from port 3. This is analogous to the operation of an electronic circulator. Fiber-optic circulators are used to separate optical signals that travel in opposite directions in an optical fiber, for example to achieve bi-directional transmission over a single fiber. Because of their high isolation of the input and reflected optical powers and their low insertion loss, optical circulators are widely used in advanced communication systems and fiber-optic sensor applications. Optical circulators are non-reciprocal optics, which means that changes in the properties of light passing through the device are not reversed when the light passes through in the opposite direction. This can only happen when the symmetry of the system is broken, for example by an external magnetic field. A Faraday rotator is another example of a non-reciprocal optical device, and indeed it is possible to construct an optical circulator based on a Faraday rotator. Structure Principle It consists of a Faraday rotator and two polarizing prisms on both sides. When polarized light passes through a Faraday rotator, its polarization plane can rotate 45°under the action of an external magnetic field. As long as the optical axes of the two polarizing prisms are set at an appropriate angle to each other, the insertion loss of the inter-connected optical paths can be very low and the isolation of the disconnected optical path is very large. The optical circulator can also be formed by utilizing the characteristics of the single-mode fiber will produce the Faraday rotation effect under the action of an external magnetic field. The insertion loss and isolation of the polarization-independent optical circulator are independent of the polarization state of the incident light. Technical Parameters The technical parameters of optical circulator include insertion loss, isolation, crosstalk, polarization dependent loss(PDL), polarization mode dispersion(PDM) and return loss, etc. The definitions of insertion loss, isolation, polarization dependent loss and polarization mode dispersion of optical circulators are basically the same as those of optical isolators, except that for an optical circulator, it refers to a specific index between two adjacent ports.
