Ultra-high-speed photoelectric signal conversion instrument launched
Engineers at the University of California, Davis have invented a new device that can quickly convert light pulses into electronic signals and return them to pulses. The measurement speed is about 10,000 times more efficient than existing devices. This device can be used in ultra-fast, high-capacity communication systems to obtain images of the earth's surface and crack confidential information. Related reports were published in the recently published "Nature · Photonics" magazine.
Professor Liu Ben (Transliteration) of the Department of Electronic Computer Engineering at the University of California, Davis said: "We have found a way to measure extremely high-capacity waveforms in combination with electronics and optical standards."
The new device is about 10,000 times faster than the current measurement of optical pulses. It breaks the limitations of the existing technology, can simultaneously measure the amplitude and phase of the pulse, and can measure the information in the range of 100 terahertz in real time. At present, the information capacity of electronic devices can only reach one-tenth of the Gigahertz bandwidth.
The research group grouped the incoming signals by frequency spectrum, processed them in parallel, and finally formed them into a whole. High frequency pulses can "package" more information in a given time. If you want to capture a complex waveform and quickly decode it into a digital electronic signal, the device needs to "bundle" more data and convert it into an optical signal. On the contrary, the device also needs to obtain the optical signal from the electronic signal.
This technology can be used in ultra-high-speed communication systems and light detection and ranging systems (LiDAR). LiDAR can quickly scan landforms and landscapes with laser pulses and generate very detailed 3D images of the earth ’s surface. The researchers said that the next step of the research team will be committed to implanting all the equipment in a miniature silicon wafer so that it can work and apply better.
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