Frequency comb spectrum technology breakthrough: is expected to improve the spectrometer spectral resolution
Key Laboratory of Terahertz Solid State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences Cao Juncheng and Li Hua led the research team based on the highly efficient continuous wave, electrically pumped terahertz quantum cascade laser (THz QCL) light source to overcome THz laser Narrowband bottleneck, for the first time in the world to achieve uniform, wide-spectrum THz QCL frequency comb (Frequency comb), the frequency of continuous coverage to reach 330GHz.
The indicator for bound state to continuous state transition THz QCL world record. Based on this homogeneous, wide-spectrum THz QCL frequency comb, successful THz spectral analysis was achieved. Related Research Articles Homogeneous spectral spanning of terahertz semiconductor lasers with radio frequency modulation was published in the March 8th Science Report (WJ Wan, H. Li, T. Zhou, and JC Cao, Sci. Rep. 7, 44109 ( 2017)).
Since the research on frequency comb got the Nobel Prize in physics in 2005, the frequency combing research in each band has gradually become a hot topic. Frequency comb consists of a series of frequency stable, equally spaced spectral lines. Because of its very high frequency stability (Hz-kHz), the frequency comb can be analogized to a single ruler for applications such as absolute frequency measurement, high precision spectral analysis, or as an ultra-stable frequency reference for other lights. In the THz band, due to the lack of an effective radiation source, the development of the THz frequency comb has a certain degree of difficulty. Among many THz radiation sources, the electrically pumped THz QCL technology is the most effective and near-practical solution for THz frequency combs. Based on the current implementation of the homogeneous, wide-spectrum THz QCL frequency comb, the team is developing dual THz QCL frequency comb spectroscopy. Compared with the current commercialized THz spectrometer, the frequency comb spectroscopy is expected to increase 3-4 orders of magnitude in the resolution of the spectrum in the future, with obvious industrialization prospect.
The work was funded by the "Hundred Talents Program" of the Chinese Academy of Sciences, the major scientific instruments and equipment development of the Ministry of Science and Technology, the National Natural Science Foundation of China and the Shanghai Municipal Science and Technology Commission for International Cooperation in Science and Technology.
Metallic twist tie is also called PET aluminized film. The overall specifications of the product are divided into round wire and flat wire. The product color can be divided into dozens of colors such as gold, silver, red, blue, green, black, white, and magic color. Products of both specifications can be rolled and slit.
Metallic twist tie is mainly used for the wrapping and decorative embellishment of various food, gifts, stationery, tableware, gardening and other products (food such as bread, lollipops, etc.; tableware such as cup holders, disposable cups, etc.) The wrapping and bundling of daily necessities such as bowls, cups, thermos, seasoning pots, knives, forks, and barbecue utensils; stationery such as pen holders; accessories such as locks and keys; gardening such as rich bamboo decorations can also be used for vegetable bundling.
Metallic Twist Tie,Metallic Metal Wire,Metal Wire Twist Tie,Plastic Metallic Twist Tie
Dongguan Hongtao Plastic Hardware Co., LTD , https://www.twisttiemanufacturer.com