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The crystal which is covered by electrode may be considered to be a voltage-variable wave-plate. When a voltage is applied, the retardation of laser polarization of the light would be changed while a beam passes through an ADP crystal. This variation in polarization results in intensity modulation downstream from the output polarizer. The output polarizer converts the phase shift into an [[amplitude modulation]].
Micrometre-scale silicon electro-optic modulator<ref>Nature 435, 325-327 (19 May 2005)</ref>
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== Applications and Commercial products ==
=== Electro-optic modulator ===
* from THORLABS
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Applications ; Chirp Control for High-Speed Communications (SONET OC-768 Interfaces, SDH STM-256 Interfaces), Coherent communications, C & L Band Operation, Optical Sensing, All-optical frequency shifting.
▲* from Mach-40™
=== Acousto-optic modulator of nano-structures ===
Applications ; acousto-optic modulators include laser printing, video disk recording, laser projection systems.
* from ELECTRO-OPTICAL PRODUCTS CORPORATION
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{{reflist|2}}
{{DEFAULTSORT:Optical Modulators Using Semiconductor Nano-Structures}}
[[Category:Optical devices]]
[[Category:Optoelectronics]]
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