Researchers at Macquarie University have created a diamond laser that uses sound waves to give output power 10 times higher than comparable devices.
These lasers, called Brillouin lasers, increase the amplification of their light by making use of materials in which light and sound interact. By using diamond as this material, the laser can be made smaller while retaining stability and power.
This effect is due to its high thermal conductivity and because the speed of sound is higher in diamond than in other materials. And because of that increase, the laser can create frequencies beyond the microwave band, reducing frequency noise and making the technology suitable for advanced wireless systems.
“We can now begin to think about the design of Brillouin lasers in a new way, rather than as a phenomenon limited to small guided wave structures or as a detrimental effect in fibre lasers,” said Dr Zhenxu Bai, an optical engineer and the project’s lead PhD student.