Diamond is regarded as a predominantly interesting material for this type of laser system for several main reasons. The thing is that it offers high thermal conductivity that promotes the development of compact fiber laser systems that have such features as high stability and high power. Herewith, such fiber laser has also a much higher level of sound speed compared to other materials. Therefore, new laser systems enable to directly synthesize frequencies in the hard-to-reach millimeter-wave band.
A team of researchers demonstrates that the laser beam light-sound interaction is predominantly strong in diamond, also they develop the first bench-top Brillouin laser system that applies diamond. It should be noted that the result is awesome, the thing is that new fiber laser offers a highly practical technique with a greatly increased range of performance. Compared to previous versions, the laser system with a diamond can operate without having to limit the optical or sound waves in a waveguide to increase the interaction.
To be more precise, it is easier to scale such fiber laser systems in size, they have much greater flexibility for monitoring the laser beam features as well as increasing power. Diamond opens new possibilities to use the unique features of Brillouin laser systems. Additionally, the fiber lasers result in numerous properties containing laser beam generation with ultra-pure and stable output frequency, the creation of new frequencies, and potentially, laser systems with exceptionally high efficiency.
The researchers confirm that the developed laser technology offers a new way to high powered fiber lasers that are significantly efficient and have unique frequency features, for instance, low-phase noise and narrow linewidth. Such laser beam features play a crucial role in applications that require the highest standards of noise-free frequency properties, for example, ultra-sensitive detection of gravitational waves or manipulating large arrays of qubits in quantum computers.
Moreover, the diamond in laser systems allows synthesizing very clear frequencies beyond the microwave band. Thus, “as a consequence of the very high speed of sound in diamond—a dashing 18 km/s—the frequency spacing between the input pump laser beam and the laser line is many times higher than in other materials.” It is possible to produce frequencies in the millimeter-wave band (30-300 GHz) employing a technique called photo-mixing.
Finally, the fiber laser technology quantifies the strength of the light-sound interaction in diamond, a crucial parameter for predicting future design and performance resulting in the creation of a practical tool with over 10 W of laser beam power. Also, it is planned to expand the laser system abilities by offering fiber lasers with higher levels of frequency clarity and laser beam power required to maintain future progress in quantum science, wireless communications, and sensing.
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