| In this research, a multi-mode waveguides thermo-optic switch was first developed based on the unidirectional coupling mechanism. This device has a packing density of 40 channels/cm. Simulation result shows that an extinction ratio of greater than 20dB can be achieved with the device-electrode interaction length of 30mm. The thermo-optic switch operating at wavelengths of 632.8nm and 1.3 μm has been demonstrated experimentally with extinction ratios of 21dB and 22dB, respectively.; Based on the same unidirectional coupling mechanism, A multi-mode waveguides electro-optic modulator was also designed, fabricated, and tested. The device has a modulation depth of 91% and dynamic range of 68V.; An EO modulator array was also developed based on multi-mode optical waveguides. The device has eight-multi-mode waveguide EO modulator on a size chip of 20mm by 2.5mm. Each of the EO modulator has the modulation depth of 91%. The cross talk between the EO modulators was measured to be −22dB.; These devices can be used for multi-mode fiber optic communications. |
