Thermal compensation optical wave multiplexing and demultiplexing chip and preparation method thereof
A light wave multiplexing and demultiplexing technology, applied in the direction of optical waveguide, light guide, optics, etc., to achieve the effect of increasing polarization-dependent loss, increasing insertion loss uniformity, and realizing temperature drift compensation
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[0052] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0053] The invention provides a thermally compensated light wave multiplexing and demultiplexing chip, that is, a grating structure is etched at the input slab waveguide of the chip on the basis of , and the grating structure is filled with negative refraction for realizing the temperature drift compensation function High-efficiency materials, so that the light incident to the arrayed waveguide from the input slab waveguide of the chip does not drift with temperature.
[0054] Specifically, a thermal compensation structure 3 is provided on the input star coupler 2, and the thermal compensation structure 3 includes a grooved grating 31, and the grooved grating 31 is filled with a negative refractive index material for realizing the temperature drift compensation fu...
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