China's deep sea equipment to create the highest deep sea Raman spectrum detection records, the successful development of the instrument will enhance China's deep-sea mineral resources, energy resources (gas hydrate), carbon cycle and climate change and deep-sea biological information detection capabilities. On April 12, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, informed that in late March 2017, the abyss expeditionary team of the Chinese Academy of Sciences went to the Mariana Trench Sea to carry out the strategic B-type pilot project of the CAS. "And key national R & D projects," Deep Sea Key Technology and Equipment "and other key special tasks such as science and technology, the use of in situ experiment number, Wanquan, Tianya abyss lander to our own research and development of a series of deep-sea equipment were successfully tested and the actual Applications, including our first successful 7-kilometer UV laser Raman spectrometer. The spectrometer is the first UV laser Raman spectrometer in the world for deep sea exploration and has also created the highest deep sea detection record (7449 meters) for Raman spectroscopy. Over half the area of ​​our planet is covered by deep seawater above 2,000 meters. Deep-sea seabed not only contains abundant mineral resources such as oil, natural gas, natural gas hydrate, metal nodule, hydrothermal fluid and sulfide, but also has extreme life phenomena (deep-sea biological genetic resources), which have significant economic and strategic value. As terrestrial energy becomes more and more tense, deep-sea exploration and resource development technologies have played an irreplaceable role in the development of marine environment and deep-sea resources. It can be said that whoever holds the advanced technology of deep sea survey, exploration and resource development masters the initiative in the development of the strategy of the century's oceans. Raman spectroscopy is an analytical technique that can detect marine resources in situ and is a technique that can provide molecular fingerprinting. Unlike infrared spectroscopy, Raman spectroscopy can directly measure substances in aqueous solution. Therefore, In-situ and accurate determination of substances under seawater conditions: Raman spectroscopy can analyze the hydrological environment of deep-sea seawater, such as the formation and distribution of methane hydrate in seawater, the biological species in deep sea and the atmosphere of carbon dioxide in the ocean Dissolved, the various salts such as sulfate concentration analysis, you can also analyze the water's Raman peak to roughly the status of deep-sea water. Raman spectroscopy can analyze the mineral deposits, such as manganese nodules and so on, and analyze the rock composition of the crater and seabed in the deep sea to analyze the geological causes and mineral deposits. During mining operations, samples can be pre-screened using Raman spectroscopy. Deep-sea Raman spectroscopy has long been the focus of R & D in deep-sea resource exploration, and many research teams at home and abroad have devoted a great deal of resources. However, most of the Raman spectrometers currently used in ocean and deep sea exploration have long wavelength lasers, and their intrinsic Raman scattering is weak. In addition, a large number of chlorophyll II and biological debris in the marine environment exist in the visible area there is a strong interference, these substances will be adsorbed to the surface of some minerals, the fluorescence of its serious interference with Raman signal acquisition, greatly restricted the pull Application of Mann Spectroscopy in Marine Research. As early as 1998, the team led by researcher Li Can at Dalian Institute of Chemical Physics, Chinese Academy of Sciences, developed the first UV Raman spectrometer with independent intellectual property rights in China and successfully applied this technology to material research to solve Raman's Spectral studies of long-standing fluorescent interference problems in materials. Using UV Raman spectroscopy combined with resonance Raman spectroscopy, Li Can team identified the first active sites with low content of transition metal in solid materials (<1%) for the first time in the world. The in situ UV Raman spectroscopy was the first time in the world In situ UV Raman spectroscopy studies on the synthesis of molecular sieve materials under simulated hydrothermal conditions have detected intermediate species that play key roles in the formation of molecular sieve materials under hydrothermal conditions. These efforts have won the second prize of National Technological Invention and the Second National Natural Science Prize, and have aroused widespread international attention. It also shows that UV Raman spectroscopy can greatly improve the detection sensitivity of Raman signals and avoid fluorescent Interference, and shows great advantages in the research of high temperature and high pressure aqueous system. On this basis, the introduction of UV Raman spectroscopy into the deep seabed for exploration is yet to be reported in the world. Therefore, it is not only in the scientific sense but also in the field of high-end instrument development. However, the more the excitation light goes to the UV region, the higher the spectral resolution required for the grating, the greater the required spectrometer size. However, the requirement of deep sea exploration is as small as possible. How to reduce the spectral system of a UV Raman spectrometer to a notebook size is the first problem the R & D team faces. In addition, under deep sea conditions, the spectrometer faces extreme conditions of high pressure (about 700 atmospheres) and frequent landing shocks, placing stringent requirements on the performance of the spectrometer. Prof. Fan Fengtao, a researcher of the academician team Li Chan, and other senior engineers such as Prof. Huang Baokun successfully applied the extreme conditions of the deep ocean after three years of research through scientific design, repeated verification, the use of folding mirrors, optical fiber soft connection and coaxial mirrors and a series of technologies Of UV Raman spectroscopy equipment, and with the Sanya deep sea engineering staff completed the application of spectrometer engineering. The success of this sea trial proved that China can thus make more than 99% of the world's waters for molecular spectroscopy and provide a weapon for China's deep-sea mineral resources and energy resources development and marine scientific research, which will contribute to the implementation of China's maritime power strategy .