Silicon-based integrated polarization modulation device
A polarization modulation, silicon-based technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of large volume, difficult to integrate, unable to obtain polarized light, etc., and achieve the effect of small overall volume, simple polarization modulation, and low cost.
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Embodiment 1
[0018] Such as figure 2 As shown, the silicon-based integrated polarization modulation device of this embodiment includes a polarization beam splitter 10 , a polarization beam combiner 20 and a silicon-based phase shifter 30 .
[0019] One output end of the polarization beam splitter 10 is connected to the polarization beam combiner 20 through a silicon-based phase shifter 30 , and the other is directly connected to the polarization beam combiner 20 .
[0020] The optical path between the polarization beam splitter 10, the polarization beam combiner 20 and the silicon-based phase shifter 30 forms an optical connection channel through a planar optical waveguide. The planar optical waveguide corresponds to a mode in which an optical signal is transmitted.
[0021] After the signal light is processed by the polarization beam splitter 10, it is divided into two signal lights whose polarizations are perpendicular to each other. One of the signal lights is modulated by the silicon...
Embodiment 2
[0023] The silicon-based polarization modulation device in the first embodiment above cannot obtain elliptically polarized light, and this embodiment further improves the above-mentioned silicon-based polarization modulation device.
[0024] Such as image 3 As shown, the silicon-based integrated polarization modulation device of this embodiment includes a polarization beam splitter 12, an optical directional coupler 22, a polarization beam combiner 32, and three silicon-based phase shifters.
[0025] The output end of the polarization beam splitter 12 is respectively connected to the optical directional coupler 22 through two silicon-based phase shifters, and the output end of the optical directional coupler 22 is connected to the polarization beam combiner 32 through a silicon-based phase shifter. The other path is directly connected to the polarization beam combiner 32 .
[0026] The optical path between the polarization beam splitter 12, the optical directional coupler 22...
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