Optical Modulator-Integrated Lasers

Integrated Optical Modulator for Adaptive Digital Modulation and Analogue Applications

Adaptive digital modulation in the optical domain is performed using an integrated optical modulator with a high symbol rate of 10 Gbaud. The optical digital-to-analogue conversion technique that employs an optical IQ modulator and a dual-polarization quadrature-phase-shift-keying (DP-QPSK) modulator is applicable to binary PSK, QPSK, and 16-ary quadrature amplitude modulation. Analogue modulat...

Neodymium-doped Waveguide Amplifiers and Lasers for Integrated Optical Applications

(project: 06986 " Optical Backplanes "). Microscope picture of the cross section of neodymium-complex-doped polymer channel waveguides. This thesis is dedicated to my parents， who have given me everything they could possibly give and to whom there is no way of paying back…

Surface Plasmon Optical Modulator

Silicon optical modulator simulation

We developed a way of predicting and analyzing high speed optical modulator. Our research adopted a bottom-up approach to consider high-speed optical links using an eye diagram. Our method leverages on modular “mapping” of electrical characteristics to optical characteristics, while attaining the required accuracy necessary for device footprint approaching sub-micron scales where electrical dat...

Double-layer graphene optical modulator.

Here we report a high-performance double-layer graphene optical modulator. By using two graphene layers and an oxide layer in between to form a p-oxide-n like junction, this modulator operates at 1 GHz with a high modulation depth (~0.16 dB/μm) at a moderate drive voltage (~5 V). Benefited from the symmetrical band structure of graphene near Dirac point, such design eliminates the optical loss ...