Small sensitivity to temperature variations of Si-photonic Mach-Zehnder interferometer using Si and SiN waveguides

Frontiers in Materials

Hiroshi eFukuda¹  Tsuyoshi eYamamoto²  Koji eYamada³  Tatsurou eHiraki³ 

[1] NTT Device Innovation Center;NTT Device Technology Laboratories;NTT Nanophotonics Center;

关键词: silicon photonics;    Waveguide;    Mach-Zehnder interferometer;    thermo-optic effect;    Silicon nitride.;   

DOI  :  10.3389/fmats.2015.00026

来源: DOAJ

【 摘 要 】

We demonstrated a small sensitivity to temperature variations of delay-line Mach-Zehnder interferometer (DL MZI) on a Si photonics platform. The key technique is to balance a thermo-optic effect in the two arms by using waveguide made of different materials. With silicon and silicon nitride waveguides, the fabricated DL MZI with a free-spectrum range of ~40 GHz showed a wavelength shift of -2.8 pm/K with temperature variations, which is 24 times smaller than that of the conventional Si-waveguide DL MZI. We also demonstrated the decoding of the 40-Gbit/s differential phase-shift keying signals to on-off keying signals with various temperatures. The tolerable temperature variation for the acceptable power penalty was significantly improved due to the small wavelength shifts.

【 授权许可】

Unknown