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An optical modulator is a device which is used to modulate a beam of light. The beam may be carried over free space, or propagated through an optical waveguide (optical fibre). Depending on the parameter of a light beam which is manipulated, modulators may be categorized into amplitude modulators, phase modulators, polarization modulators etc. Often the easiest way to obtain modulation of intensity of a light beam, is to modulate the current driving the light source, e.g. a 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, e.g. in fiber optic communications, called external light modulators.
With laser diodes where narrow linewidth is required, direct modulation is avoided due to a high bandwidth "chirping" effect when applying and removing the current to the laser.
Optical modulators are used with superconductors which work properly only at low temperatures, generally just above absolute zero. Optical modulators convert information carried by an electric current in an electromagnet into light.[1]
^"A magneto-optic modulator could facilitate the development of next-generation superconductor-based computers". September 26, 2022.
An opticalmodulator is a device which is used to modulate a beam of light. The beam may be carried over free space, or propagated through an optical waveguide...
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material for optical waveguides, mobile phones, piezoelectric sensors, opticalmodulators and various other linear and non-linear optical applications...
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acousto-optic modulator Filament propagation Rapatronic camera, which used a Kerr cell to take sub-millisecond photographs of nuclear explosions Optical heterodyne...
align an optical fiber with another optical fiber or with an optoelectronic device such as a light-emitting diode, a laser diode, or a modulator. This can...
visibly clear PDRC designed "using a rational design to deploy an opticalmodulator (n-hexadecane) in SiO2 aerogel microparticles within a silicone elastomer...
technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its applications...
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