Technologies such as fiber optics leverage the speed of light to enable electronic and telecommunication devices to transmit information faster than ever before. The maximum speeds that can be achieved by such technologies are limited by our ability to resolve the peaks and valleys within the ultrafast oscillations of light pulses at higher frequencies. Researchers at the University of Central Florida (UCF) had developed a tool that could help raise the bar for electronic and telecommunication speeds through real-time, single-shot measurement of few-cycle optical waveforms within the mid-infrared region.
The new device, which represents the first-ever “optical oscilloscope,” according to UCF, utilizes a silicon-based image sensor chip to characterize the electric field of light within a single laser pulse and converts the light oscillations into electrical signals. The ability to resolve few-cycle waveforms in the mid-infrared can allow for a higher density of information to be transmitted through light than through current conventional cellphone and internet communication technologies that cover frequencies in the radio and microwave regions of the electromagnetic spectrum. An optical oscilloscope capable of sub-femtosecond resolution of electric field oscillations with single-shot operation could push the limits of electronic communication speeds to new heights, and could additionally aid in the study of mechanisms underlying ultrafast physical and chemical phenomena, the researchers wrote. This study was published in Nature Photonics.
“Fiber optic communications have taken advantage of light to make things faster, but we are still functionally limited by the speed of the oscilloscope,” said Michael Chini, corresponding author on the paper. “Our optical oscilloscope may be able to increase that speed by a factor of about 10,000.”
The device’s capability for real-time measurement of the electric fields of individual laser pulses was demonstrated in Chini’s lab at UCF. The team is now working to improve the technology to achieve even faster time resolution.
Photo: Michael Chini, associate professor of physics at UCF, developed the idea for the single-shot waveform measurement sheme and oversaw the research team that created the optical oscillloscope. Credit: UCF