Optical device for generating and modulating thz and other...

H - Electricity – 04 – B

Patent

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H04B 10/155 (2006.01)

Patent

CA 2620791

Optical generation and modulation is carried out in the optical domain and converted to, for example, the THz band using suitable optical/electrical conversion hardware. In accordance with one embodiment of the present invention, an electrooptic modulator is significantly overdriven to create sidebands on an optical carrier signal. An arrayed waveguide grating or other suitable filter is then used to filter the optical signal and remove the carrier signal and unwanted sidebands. The desired sidebands are then combined to create an optical signal that can be encoded with data through suitable modulation. Additional embodiments are disclosed.

La création et la modulation de signaux optiques se font dans le domaine optique puis intervient une conversion, par exemple vers la bande THz, au moyen d'un équipement optico-électrique de conversion approprié. Dans l'une des variantes de l'invention, un modulateur électro-optique est significativement surexploité pour créer des bandes latérales sur le signal de la porteuse optique. On utilise alors un réseau sélectif planaire ou tout autre filtre adapté pour filtrer le signal optique et éliminer le signal de la porteuse et séparer les bandes latérales non désirées, lesquelles sont combinées pour créer un signal optique pouvant être codé avec des données à l'aide de d'une modulation adaptée. L'invention porte également sur d'autres variantes.

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