Optical waveguide switch
A technology of optical waveguide and switch, applied in the field of optical waveguide switch using MZI structure, can solve the problems of unreachable, high extinction ratio, light attenuation, etc., and achieve the effect of improving device efficiency and high extinction ratio
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[0019] Below by specific embodiment and in conjunction with accompanying drawing, the present invention is described in detail:
[0020] The invention discloses an optical waveguide switch with a high extinction ratio using an asymmetric semiconductor-based waveguide MZI structure, wherein the two arms of the MZI structure adopt different waveguide container structures: in the waveguide container used by one arm, background ions The concentration is high, mainly to achieve amplitude modulation; in the waveguide container used in the other arm, the concentration of background ions is low, mainly to achieve phase modulation. The PN junction and PIN junction on the optical waveguide are two special cases of waveguide capacitors that can realize the aforementioned functions. A PN junction has a higher background ion concentration, while a PIN junction has a lower background ion concentration. The "higher" or "lower" here is relative, that is, one of the background ion concentrati...
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