Optical modulators using semiconductor nano-structures: Difference between revisions

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An optical modulator is a optical device which is used to modulate a beam of light with perturbation device. it is a kind of transmitter to convert information to optical binary signal through optical fiber (optical waveguide) or transmission medium of optical frequency in fiber [[optic communication]]. There are several method to manipulate this device depending on the parameter of a light beam like [[amplitude modulator]] (majority), [[phase modulator]], [[polarization modulator]] etc.

The easiest way to obtain modulation is modulation of intensity of a light by the current driving the light source (laser diode). This sort of modulation is called direct modulation, as opposed to the external modulation performed by a light modulator. For this reason, light modulators are called external light modulators.