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2021-12-15 15:29:21 | onclick: | The first optical oscilloscope that can measure photoelectric field in real time appears

In the latest issue of nature photonics, American scientists pointed out that they have developed the world's first optical oscilloscope - an instrument capable of measuring photoelectric field. The device can convert optical oscillations into electrical signals, just as a hospital monitor converts a patient's heartbeat into electrical oscillations. This advanced new equipment is expected to improve the efficiency of optical fiber communication.

So far, reading the electric field of light has been a major challenge for scientists because light waves oscillate at high speed. The state-of-the-art technology can measure electric fields with frequencies up to gigahertz covering the electromagnetic spectrum, radio frequency and microwave bands.

Since light waves can oscillate at a higher rate, higher density information can be transmitted. However, the current tools used to measure the light field can only analyze the average signal related to the light pulse, but can not analyze the peak and valley values in the pulse. However, it is very important to measure the peak and valley values in a single pulse, because it is at this stage that information can be packaged and transmitted.

In order to better measure the peak and valley values of optical pulses, Michael Cheney, one of the research leaders and associate professor of physics at the University of Central Florida, proposed a single excitation waveform measurement scheme. Subsequently, the research team developed the world's first optical oscilloscope and demonstrated its ability to measure a single laser pulse electric field in real time in the laboratory.

Chini explained: "optical fiber communication uses light to improve the data transmission speed, but we are still limited by the speed of the oscilloscope. The speed of the newly developed optical oscilloscope is increased by about 10000 times. Next, we plan to further improve the technology and optimize it."

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