YOKOYAMA Research Laboratory

Institute for Materials Chemistry and Engineering

Polymer Photonics Device
and Integration

Toward High-speed Optical Signaling and Networking


With the recent dramatic increase in information communication traffic, there is a demand for more sophisticated communication equipment and for a drastic reduction in power consumption. There is also a demand for a cost reduction for high-speed data transmission technology for data centers. An optical modulator made of an organic polymer material, instead of a conventional inorganic material, has been expected as a new technology that would meet these demands. An optical modulator is a device that utilizes an electro-optic property to convert an electrical signal to an optical signal at high speed. Such conversion from an electrical signal to an optical signal allows for high-speed transmission of large amount of information.



Phenomenon in which application of voltage to a material causes a change in the refractive index of light is called an electro-optic effect, and the property of such substance is called an electro-optic property. Ultra-high-speed optical modulator made of an electro-optic polymer. A laser light input to the polymer optical modulator is modulated by a high-speed electrical signal, whereby an ultra-high-speed optical signal is transmitted.