Method for fabricating low-loss optically active device

Abstract

The invention provides a method of manufacturing an optical active device. The optical active device is provided with an optical waveguide which consists of two optical waveguide inner core areas, a nonlinear inner core area which requires nonlinear action and a linear inner core area which does not require the nonlinear action. The method comprises the method of manufacturing the optical active device of the optical waveguide which consists of an optical waveguide inner core area which has the nonlinear action and the optical waveguide inner core area which does not have the nonlinear action. The optical waveguide is formed by nonlinear optical polymer only in the nonlinear action generating area of an optical modulation or an optical switch and is formed by linear optical polymer in other areas, which ensures that the whole waveguide loss of the waveguide is minimized.

Description

technical field [0001] The present invention relates to a method of manufacturing an optical device, in particular to a method of manufacturing a low-loss optical active device by injecting a nonlinear optical polymer only into the region of the optical waveguide where the nonlinear effect occurs to form the inner core of the optical waveguide Reduce the waveguide loss of the device. Background technique [0002] In forming optically active devices such as optical modulators or optical switches using optical polymers, an optical waveguide formed in the device consists of an inner core and upper and lower cladding layers surrounding the inner core. Here, the refractive index of the material used for the inner core is always greater than the refractive index of the material used for the cladding layer. This difference in refractive index causes light passing through the core to propagate along the optical waveguide due to total internal reflection. Traditionally, in fabricat...

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Problems solved by technology

Therefore, in the case of forming optical waveguides with the same length and structure, only optical waveguides made of nonlinear optical polymers have the following disadvantages in terms of injection loss of the device compared with optical waveguides formed of linear optical polymers is unfavorable

[0004] Figure 1A and Figure 1B The existing directional coupling optical switch and the existing Mach-Zehnder optical modulator are respectively shown, such as Figure 1A and Figure 1B As shown, since all regions of the optical waveguide including the electrode 130 are composed of nonlinear optical polymers with higher optical losses than linear optical polymers, the total injection loss of the device is significantly increased

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