For a long time, how to launch lasers more efficiently has been the untiring pursuit of scientists. The latest research has opened up new research ideas.
Lasers and atomic energy, semiconductors, and computers are considered together as the four modern inventions of the 20th century. Laser technology is a technique that uses light or discharges and other powerful energy to excite specific substances to generate light. It is applied to machinery, aviation, and electronics. Multiple fields.
At present, fiber lasers are one of the most widely used lasers. According to forecast, the global fiber laser sales will increase from 1.590 billion US dollars in 2017 to 2.50 billion US dollars in 2020, with a compound annual growth rate of 16.28%. With the rapid development of lasers, the research on laser technology in various countries has never stopped.
In the latest research, Mordechai Segev of the Technion Institute in Haifa, Israel, and his team created a laser beam based on topological photonics, in which the light waves are in phase. This means that the energy loss of this technology will be lower, that is, the laser emission efficiency is higher.
In the experiment, the research team etched a series of circular channels onto the surface of the semiconductor material chip and projected infrared light onto the structure from the top of the chip. These circular channels precisely capture the light wave of a specific wavelength, and then make the light wave from a loop. Move to the next loop to form the photo subsystem.
However, in the optical subsystem, the direction of wave propagation is reversible, which leads to energy loss. Last year, in the study of Boubacar Kanté of the University of California, he used magnetic fields to limit the wave propagation to solve this problem. In contrast, Segev adopted the asymmetric design of the circular channel, and the design itself will have priority. Filtering the propagation of one direction of the wave not only avoids the problem of energy loss, but also causes the circulating light pulse to be amplified or amplified.
There are essential differences between the two methods. Although Boubacar Kanté's method forms a laser beam, using magnetic fields to limit it more or less weakens the laser beam's emission energy, and Segev's improvement is much more subtle.
In this regard, Segev said: "This is thanks to topology protection. The system perfectly tells us that imperfection is precisely the most stable."
"Most physicists suspect that the topological photonics society is compatible with laser generation, resulting in the inability to launch lasers, but in fact, these systems are often easier to work than our existing systems."
Seal Set,Seal Components,Seal Group Cover,Cartridge Seal Set
Dandong Huarui Fluid Machinery Co., Ltd , https://www.ddhrseal.com