Global Information Lookup Global Information

Optical modulation amplitude information


In telecommunications, optical modulation amplitude (OMA) is the difference between two optical power levels, of a digital signal generated by an optical source, e.g., a laser diode.

It is given by

where P1 is the optical power level generated when the light source is "on," and P0 is the power level generated when the light source is "off." The OMA may be specified in peak-to-peak mW.

The OMA can be related to the average power and the extinction ratio

In the limit of a high extinction ratio, . However, OMA is often used to express the effective usable modulation in a signal when the extinction ratio is not high and this approximation may not be valid.

and 21 Related for: Optical modulation amplitude information

Request time (Page generated in 0.8415 seconds.)

Optical modulation amplitude

Last Update:

telecommunications, optical modulation amplitude (OMA) is the difference between two optical power levels, of a digital signal generated by an optical source, e...

Word Count : 201

Quadrature amplitude modulation

Last Update:

Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used...

Word Count : 1941

Amplitude modulation

Last Update:

Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude...

Word Count : 4576

Optical modulator

Last Update:

waveguide (optical fibre). Depending on the parameter of a light beam which is manipulated, modulators may be categorized into amplitude modulators,...

Word Count : 416

Modulation

Last Update:

sideband modulation (VSB, or VSB-AM) Quadrature amplitude modulation (QAM) Angle modulation, which is approximately constant envelope Frequency modulation (FM)...

Word Count : 3014

Frequency modulation

Last Update:

relation to the modulating signal amplitude. Digital data can be encoded and transmitted with a type of frequency modulation known as frequency-shift keying...

Word Count : 3938

Optical transfer function

Last Update:

retina, screen, or simply the next item in the optical transmission chain. A variant, the modulation transfer function (MTF), neglects phase effects...

Word Count : 5592

Coherent optical module

Last Update:

optical module refers to a typically hot-pluggable coherent optical transceiver that uses coherent modulation (BPSK/QPSK/QAM) rather than amplitude modulation...

Word Count : 1019

Intensity modulation

Last Update:

In optical communications, intensity modulation (IM) is a form of modulation in which the optical power output of a source is varied in accordance with...

Word Count : 519

Line code

Last Update:

line-coded signal can be used to turn on and off a light source in free-space optical communication, most commonly used in an infrared remote control. the line-coded...

Word Count : 1665

Nonlinear optics

Last Update:

self-focusing as a mechanism to mode-lock laser. Self-phase modulation (SPM), an effect due to the optical Kerr effect (and possibly higher-order nonlinearities)...

Word Count : 6736

FM broadcasting

Last Update:

Frequency modulation or FM is a form of modulation which conveys information by varying the frequency of a carrier wave; the older amplitude modulation or AM...

Word Count : 7683

OMA

Last Update:

Alliance, a standards body for the mobile phone industry Optical modulation amplitude, an optical communication term Outdoor Media Association, the peak...

Word Count : 536

Optical ring resonators

Last Update:

way that the resulting wave amplitude will be equal to the sum of the two individual amplitudes. As the light in an optical ring resonator completes multiple...

Word Count : 3264

Continuous wave

Last Update:

wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency, typically a sine wave, that for mathematical analysis is...

Word Count : 1526

Frequency comb

Last Update:

number of mechanisms exist for obtaining an optical frequency comb, including periodic modulation (in amplitude and/or phase) of a continuous-wave laser...

Word Count : 3835

Optical module

Last Update:

same optical modulation techniques as the ACO interfaces do. Many different forms of optical modulation and multiplexing have been employed in optical modules...

Word Count : 1947

Squeezed states of light

Last Update:

correspond exactly to those being used in optical communication. Amplitude modulation (AM) and frequency modulation (FM) are the classical means to imprint...

Word Count : 6152

Sideband

Last Update:

cos ⁡ ( 1000   t ) ⏟ carrier wave ⋅ [ 1 + cos ⁡ ( 100   t ) ] ⏟ amplitude modulation = 1 2 cos ⁡ ( 1100   t ) ⏟ upper sideband + cos ⁡ ( 1000   t ) ⏟...

Word Count : 1261

Optical computing

Last Update:

both deep learning neural networks based on phase modulation, and more recently amplitude modulation using photonic memories have created a new area of...

Word Count : 3436

Kerr effect

Last Update:

variation is responsible for the nonlinear optical effects of self-focusing, self-phase modulation and modulational instability, and is the basis for Kerr-lens...

Word Count : 2239

PDF Search Engine © AllGlobal.net