Chinese and American researchers recently cooperated in the design of a silicon-based optical waveguide in the laboratory, which solved an important problem in the field of photonic chip technology. Related papers have been published in a new issue of the American Journal of Science.
Optical communication technologies that carry information through photons instead of electrons are currently widely used. The scientific community hopes that photonic chips will become the main information processing devices for ultra high-speed communications and computing in the future. The use of photonic chips can greatly increase the speed of network data transmission and calculation, and will have a revolutionary impact on the development of the Internet. However, the preparation of photonic chips also faces an important problem - how to isolate the optical signal so that it can only propagate in one direction.
Researchers at Nanjing University, the California Institute of Technology, and the University of California, San Diego, have discovered ways to achieve optical signal isolation on laboratory silicon chips. They developed a waveguide, a transmission channel for light, using a narrow strip of 800 nanometers wide. Light propagates in one direction in the waveguide and bends as it travels in the opposite direction. This kind of optical element provides a new path for realizing the unidirectional transmission of light and optical isolation devices.
Feng Liang, the first author of the paper and a postdoctoral researcher at the California Institute of Technology, said in a phone interview with Xinhua News Agency on August 9th that their work is only one step in the process of implementing the photonics chip, but it is a crucial step. In the future, the research team will focus on achieving highly integrated photonic chips, which will further advance the application of optical interconnects in various fields.
Optical communication technologies that carry information through photons instead of electrons are currently widely used. The scientific community hopes that photonic chips will become the main information processing devices for ultra high-speed communications and computing in the future. The use of photonic chips can greatly increase the speed of network data transmission and calculation, and will have a revolutionary impact on the development of the Internet. However, the preparation of photonic chips also faces an important problem - how to isolate the optical signal so that it can only propagate in one direction.
Researchers at Nanjing University, the California Institute of Technology, and the University of California, San Diego, have discovered ways to achieve optical signal isolation on laboratory silicon chips. They developed a waveguide, a transmission channel for light, using a narrow strip of 800 nanometers wide. Light propagates in one direction in the waveguide and bends as it travels in the opposite direction. This kind of optical element provides a new path for realizing the unidirectional transmission of light and optical isolation devices.
Feng Liang, the first author of the paper and a postdoctoral researcher at the California Institute of Technology, said in a phone interview with Xinhua News Agency on August 9th that their work is only one step in the process of implementing the photonics chip, but it is a crucial step. In the future, the research team will focus on achieving highly integrated photonic chips, which will further advance the application of optical interconnects in various fields.
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