From a theoretical point of view, a projector using a laser light source can achieve a color space much larger than that of a traditional light source, and its color performance is higher than that of a conventional light source. At the same time, the traditional projector will produce brightness attenuation, color saturation, contrast reduction and other phenomena during use, which makes the output image quality greatly reduced compared with the new projector. The projector with laser pointer light source maintains high brightness, color saturation and contrast for a long time due to the low attenuation characteristics of the light source, and the color of the picture is always as bright as new.
In the long run, because laser projection technology is used by many manufacturers in the industry, its production costs and price barriers will be reduced to a range acceptable to ordinary users within a certain period of time. Considering the maintenance cost of the product and the performance of the product, the laser projector is the best weapon for home theater.
New ultra-short pulse fiber lasers have made new progress. Ultrashort pulse fiber laser has the characteristics of easy operation, compact structure, stable performance and low cost. It is widely used in high-speed optical communication, optical sensing, optical frequency comb, lidar, spectral analysis, military and other related fields. One of the research hotspots in the field. At the same time, as a frontier subject of theoretical research such as nonlinear optics, ultrashort pulse fiber laser generation technology has become one of the core technologies of national strategy and high-end industrial industry. In order to realize the ultrashort pulse fiber laser output, how to further understand the nonlinear dynamic mechanism of the fiber laser and realize the nonlinear control of the optical device in the laser cavity is the key scientific issue involved in this technology.
In view of the limitations of dark soliton pulse generation technology, young teachers such as Liu Wenjun and Lei Ming from the School of Science and Technology of University of Posts and Telecommunications theoretically analyzed the dynamic behavior of dark soliton pulse generation and experimentally realized the widest spectrum dark soliton pulse output. Based on the nonlinear Schr? Dinger equation and the complex Ginzburg-Landau equation, the transmission characteristics of dark soliton pulses in fiber lasers are studied by changing the nonlinear parameters of the fiber. The method of weakening the interaction of dark soliton pulses is theoretically proposed. A stable output of dark soliton pulses in fiber lasers is achieved.
Through theoretical calculations, the intra-cavity dispersion and nonlinear parameters of the fiber red laser pointer were further optimized, and the widest spectrum dark soliton pulsed fiber laser was successfully developed, and the shortest pulse width was achieved through the collaborative optimization of the tapered fiber and the saturable absorbing material 67 fs hybrid mode-locked fiber laser output. The research group also used it for all-fiber laser mode locking, and further realized a mode-locked pulse laser output with a pulse width of 246 fs. It is known that this is the shortest pulse width report produced by the transition metal sulfide all-fiber mode-locked laser to date.