First of all, the real white laser pointer should have all the laser characteristics of the traditional laser except monochromaticity, and it should also have the excellent characteristics that the traditional laser does not. Secondly, the white laser light source is white light, so its spectrum must be consistent with the spectrum of sunlight incident on sea level. We believe that the real white light laser should be consistent with the solar spectrum, with full coherence, super-continuity, ultra-wideband, good directivity, high brightness, and covering ultraviolet, visible, and infrared.
Is it really difficult to create a real white laser? Is there any white light laser with full coherence, super continuous, ultra wide band, good directivity and high brightness? Non-linear crystal generating white light laser and real photo of white light laser
In “Analysis: Why is it difficult to create a white laser?” The article describes the difficulty of creating a white laser pointer. Looking at the methods and channels for scientists to develop white light lasers listed above, you will find that they all have one thing in common. All R & D teams have not jumped out of the thinking circle of the traditional lasers of red, green and blue. Although everyone is working hard to develop nonlinear crystals, hoping to find a breakthrough, but one point is ignored, that is, the coherence of the laser light generated by different nonlinear crystals is inconsistent. The white light laser and the photonic crystal fiber laser developed based on the traditional three-primary laser have a serious lack of coherence and lose many excellent characteristics of the laser. Therefore, they cannot be used as an independent and true laser light source. It is classified as a quasi-white laser.
In 2015, the scientific research team led by Li Zhiyuan of the Institute of Physics of the Chinese Academy of Sciences jumped out of traditional thinking and made the first breakthrough in the research and development of white-light laser nonlinear crystals. A truly coherent, super-continuous and ultra-wideband white laser was born; The achievements are therefore shortlisted for the important achievements of China Optics in 2015.
The team uses a complete non-linear crystal, which can produce a perfect solar spectrum green laser pointer after entering through a mid-infrared or near-infrared laser, and this laser has the characteristics of full coherence, super-continuity and ultra-bandwidth Achieving the effect of “laser in, laser out” is an independent laser that is completely independent of the traditional three primary lasers. Moreover, within the range of the generated wave band, it can create the laser required for any wave band, which makes up for the deficiency that the traditional laser cannot create any wave band laser.
The non-linear crystal developed by Li Zhiyuan’s team does not require tedious and complicated instruments and equipment. It is small, lightweight, and requires no installation and debugging. It is suitable for docking with various lasers and is convenient for use by scientific research institutes, colleges and universities. When the white light laser has all the characteristics of the laser and has the advantages of the traditional laser, it can play the role of the white light laser in a wider range of scientific research and production applications. We look forward to the fact that in the near future, we can see that white light lasers of real significance can be widely used, and white light lasers can truly serve the society and promote scientific and technological progress.