Scientists increase data transfer rate 10,000 times with laser

Pulsed lasers emit light at specific intervals for a short period of time, as if

flash.Their advantage is that they focus more energy than a continuous laser, whose intensity does not change over time. If digital signals are loaded into a pulsed laser, each pulse can encode one bit of data. In this regard, the higher the repetition rate, the more data can be transmitted using a laser. But conventional pulsed optical fiber lasers are usually limited in increasing the number of pulses per second above the MHz level.

Korea Institute of Science and Technology announcedthat the research team led by senior researcher Dr. Yun-Won Song at the Center for Optoelectronic Materials and Instruments created laser pulses at a rate at least 10,000 times faster than existing analogues. This was achieved with the help of an additional cavity containing graphene installed in a fiber-optic pulsed laser generator - the latter operates in the femtosecond range (10-15 seconds). It is expected that the speed of data transfer and processing will increase significantly by applying this method to data transfer.

Korea Institute of Science and Technology (KIST)

The research team notes thatcharacteristics of the wavelength and intensity of laser radiation, which change over time, are correlated with each other. If a resonator is inserted into the laser oscillator, the wavelength of the pulsed laser is periodically filtered, thereby changing the laser intensity pattern. Based on this research, Principal Scientist Song synthesized graphene that has certain characteristics of absorbing and eliminating weak light, as well as enhancing intensity, allowing only strong light to enter the resonator.

Scientists received a repetition rate of 57.8 GHz, sothereby overcoming the limitations of pulsed lasers in terms of repetition rate. In addition, the characteristic of graphene, which locally generates heat when absorbed by a laser, was used to tune the characteristics of the graphene resonator by supplying an additional laser to the device.

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