US scientists develop new laser radiation instruments
Recently, engineers and applied physicists have laid the foundation for the development of a new "plug and play" laser-Raman injection laser-and also brought several key innovations to the entire laser technology . This laser radiation instrument combines the advantages of nonlinear optical devices and semiconductor injection lasers. It is not only compact in design, but may one day be widely used in the field of imaging and detection.
Mariano Troccoli, Ertugrul Cubukcu and Federico Capasso of the Department of Engineering and Applied Physics at Harvard University, Alexey Belyanin of Texas A & M University, Deborah L. Sivco and Alfred Y.Cho of the Lucent Technology Bell Laboratory in the United States in February On the 24th, "Nature" published a demonstration document of the conceptual model of this device. This research was partially funded by the Telecommunications and Informatics Special Research Group of Texas A & M University.
The traditional Raman laser relies on a basic physical phenomenon called the Raman effect-that is, when a monochromatic light (such as a laser) passes through a medium, its frequency will change. The light emitted by a dense and intense laser is called a "pump light source", which can deviate the molecules of some media from their original positions and make some of them lose their energy. As a result, the second laser will be generated from the medium, and its frequency is different from the first laser.
"We have been using Raman lasers for a long time," Troccoli said. "In general, this laser requires a huge and powerful external pump light source to compensate for the attenuation or attenuation of light when passing through a certain substance. In our research, the pump and the substance that the light passes through Are placed in the same device. "
This research team merged the energy source with the Raman matter to actually create a laser in the laser. Their research has brought several key new inventions to the entire laser technology. The injection laser is the first Raman laser driven by current. In fact, it can be used directly by turning on the power. The current generates an internal laser (pump light source) inside the substance, and this laser in turn generates Raman laser radiation. Because the pump light source is spontaneously radiated, the efficiency of this instrument is slightly higher, and 30% of the laser pump power can be converted into a Raman laser.
Pcb Printing Circuit Film,Digital Aluminum Ctp Plates,Aluminum Plate For Printing,Processless Thermal Ctp Plate
SUZHOU HUAGUANGBAOLI PRINTING PLATE CO.,LTD , https://www.huabaoiguang.com