Technology Daily, New York, January 23, according to the latest issue of Nano Express, US researchers have designed and manufactured the world's smallest electro-optic modulator, which may mean the energy used by data centers and supercomputers in the future. Will be greatly reduced.
Electro-optic modulators play a key role in fiber optic networks. Just like a transistor as a switch for an electrical signal, an electro-optic modulator can be used as a switch for an optical signal. Optical communication uses light, so the modulator is used to turn on and off the light that transmits the binary signal stream in the fiber.
Wang Xiaolong, an associate professor at the School of Electronics and Computer Science at Oregon State University, said in an interview with the Science and Technology Daily that the innovation of this technology is the integration of transparent oxide-silicon-based MOS (metal oxide semiconductor) structures in the microcavities of photonic crystals. The microcavity modulator compresses the light field to a small range and forms a strong electro-optic modulation effect by carrier enrichment, thereby achieving large electro-optic modulation in a small interval.
Wang Xiaolong said that the newly developed electro-optic modulator can greatly reduce the power consumption of optical interconnect devices. At present, the energy used by global data centers and supercomputers accounts for 4%-5% of the global power usage. Most of the power consumption of data centers is mainly generated by interconnection. Reducing system power consumption by replacing electricity is the future research direction. . However, one of the bottlenecks in optical interconnection research is electro-optical conversion, which also consumes a lot of energy.
This design combines innovations in materials and devices to enhance the interaction between electrons and photons, enabling researchers to create a smaller electro-optic modulator. The new modulator is 10 times smaller in size than the mainstream silicon-based microring electro-optic modulator, only one bacterial size (8 microns x 0.6 microns), and the active area is reduced to 0.06 cubic microns (only wavelength cube size) 2%), in theory, can reduce the energy consumption of electro-optical conversion by 2-3 orders of magnitude.
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