On the silicon-on-insulator platform, an ultra compact temperature-insensitive modulator based on a cascaded microring assistant Mach-Zehnder interferometer is proposed and demonstrated with numerical simulation. According to the calculated results, the tolerated variation of ambient temperature can be as high as 134 ℃ while the footprint of such a silicon modulator is only 340 μm2.
An ultra-compact variable optical attenuator based on slow light photonic crystal waveguide with thermo- optic effect is demonstrated. Along with power consumption of as low as 30.7 roW, a variable attenuation range of 10 dB is experimentally achieved by shifting the transmission spectrum at about 4.6 nm. The length of the ProPosed device is only 20 μm.
