Using sound and light to produce very fast data transmission, Researchers have made a breakthrough in controlling the terahertz cascade quantum laser.
This can produce data transmission at 100 gigabits per second, which is about a thousand times faster than Fast Ethernet, which works at 100 megabits per second. now the researchers using sound and light to produce very fast data transmission.
What distinguishes Terrachertz’s quantum cascade lasers from other lasers is the fact that they emit light in the terahertz range of the electromagnetic spectrum.
They have applications in the field of spectroscopy, where they are used in chemical analysis.
Ultimately, lasers can provide short, very fast wireless connections that require large amounts of data to be transmitted to hospitals or between research centers at universities or in satellite communications.
To be able to send data at this increased speed, the laser must be modulated very quickly: turn on and off or beat about 100 billion times per second. So far, engineers and scientists have not found a way to achieve this.
A team from the University of Leeds and the University of Nottingham believes that they have found a way to achieve ultra-fast modulation by combining the power of acoustic waves and light. Using sound and light to produce very fast data transmission.
At present, the quantum cascade laser modulation system is electrically controlled – however, this system has limitations. Ironically, the same electronics that provide modulation usually stop the modulation brake.
The mechanism that we developed is based on acoustic waves, the researchers said.
Quantum cascade lasers are very effective. When an electron passes through the optical component of a laser, it passes through a series of “quantum wells” where the energy level of the electron decreases and photons or pulses of light energy are emitted.
An electron can emit several photons. This process is controlled during modulation. Instead of using external electronics, research teams from the Universities of Leeds and Nottingham use acoustic waves to vibrate quantum wells in a quantum cascade laser.
Acoustic waves are produced by the pulse effect of other lasers on aluminum paper.
This causes the film to stretch and shrink, sending mechanical waves through a quantum cascade laser. Using sound and light to produce very fast data transmission.
We didn’t get a situation where we could completely stop and start the flow, but we managed to control the light output by a few percent, which was a good start.
We believe that with further improvements, we can develop new mechanisms to fully control photonic emissions from lasers.
You can even integrate the sound-producing structure into the Terrachertz laser so that no external sound source is needed.