/
/
/
Two Breakthroughs in the Development of China's High-Power Solid-State Laser Technology
ma
title
Check category

Two Breakthroughs in the Development of China's High-Power Solid-State Laser Technology

Two Breakthroughs in the Development of China's High-Power Solid-State Laser Technology

icon icon icon icon

(Summary description)Shortly after the advent of laser in 1960, famous scientists such as Basov of the former Soviet Union, Nuckolls of the United States and Professor Wang Kam-chang of China realized that they could create a laser with very high power density in the laboratory, generate high temperature and high pressure conditions and induce nuclear fusion, and independently promoted the early research of laser fusion in their respective countries. Today, laser-driven inertial confinemeut fusion (ICF) research has become a major frontier of science and technology, and is the main irreplaceable technological approach to ICF and high energy density science (HEDs) in the laboratory, as well as the future of laser fusion research. One of mankind's main technological pathways for creating sustainable energy.

Two Breakthroughs in the Development of China's High-Power Solid-State Laser Technology

(Summary description)Shortly after the advent of laser in 1960, famous scientists such as Basov of the former Soviet Union, Nuckolls of the United States and Professor Wang Kam-chang of China realized that they could create a laser with very high power density in the laboratory, generate high temperature and high pressure conditions and induce nuclear fusion, and independently promoted the early research of laser fusion in their respective countries. Today, laser-driven inertial confinemeut fusion (ICF) research has become a major frontier of science and technology, and is the main irreplaceable technological approach to ICF and high energy density science (HEDs) in the laboratory, as well as the future of laser fusion research. One of mankind's main technological pathways for creating sustainable energy.

Information

         Shortly after the advent of laser in 1960, famous scientists such as Basov of the former Soviet Union, Nuckolls of the United States and Professor Wang Kam-chang of China realized that they could create a laser with very high power density in the laboratory, generate high temperature and high pressure conditions and induce nuclear fusion, and independently promoted the early research of laser fusion in their respective countries. Today, laser-driven inertial confinemeut fusion (ICF) research has become a major frontier of science and technology, and is the main irreplaceable technological approach to ICF and high energy density science (HEDs) in the laboratory, as well as the future of laser fusion research. One of mankind's main technological pathways for creating sustainable energy.

ICF enables fusion ignition

         The basic physical characteristic of ICF to achieve fusion ignition is the use of high power density energy to heat the burning target, so that it is highly compressed to achieve self-sustained combustion of the fuel, thus achieving the conditions for thermonuclear ignition, the so-called "Lawson's criterion". High-power laser as ICF driving conditions has the significant advantage of precision and control, but it is not easy to achieve the precise conditions required by the Lawson's criterion in the laboratory's millimeter airspace, nanosecond time domain scale.

         First of all, a high energy and power of the driven laser pulse is required, as well as high beam quality, including laser wavelength, high beam quality, high targeting accuracy, precise pulse waveform and synchronization accuracy. These technical requirements not only indicate the direction for high-power laser technology research and development, but also pose a great challenge to the development of high-power solid-state laser devices.

         In the 1970s, Professor Yu Min of the Chinese Academy of Engineering Physics (CAEP) proposed that laser inertial confinement fusion is a very complex project involving five aspects of research, including theory, experiment, diagnosis, targeting and laser driver, and the coordinated development among them, i.e. the "five-in-one" development idea.

         At present, the overall level of ICF research and giant laser driver has become a reflection of a country's overall national strength, representing the overall level of a country in the field of fusion science and high energy density scientific research. At present, high-power laser technology research has gone through a brilliant development process, one generation of technology has become history, the second generation of technology has become the mainstream of development, the third generation of technology emerging, indicating the development of high-power solid-state laser technology vigorous vitality.

         Since the 1970s of last century, the United States, China, Britain, France, Japan, Russia and other countries have built more than one nanosecond pulse width neodymium glass laser device, energy from hundred joule level to tens of kilojoule level. In the 1990s, the developed countries have begun to build larger-scale devices, high-power laser technology development has stepped into a new historical period. mid-1990s, the United States Livermore Laboratory (LLNL) in the comprehensive development of a new generation of solid-state laser optical materials, unit technology and advanced overall design technology, based on the first to start a total investment of billions of dollars, a decade of big science projects, construction of National Ignition Facility (NIF). The French Atomic Energy Commission (CEA) then began construction of a megajoule laser unit (LMJ) of similar size to the NIF, and Russia plans to launch the world's most powerful laser system, the UFL-2M, in late 2017, which will be used for research in high-energy density physics and energy.

         Ultrahigh-ultra-intense short-pulse lasers are another important direction for high-power solid-state laser technology. chirped pulse amplification (CPA) technology, developed in the mid-1980s, is a new milestone in laser technology, and ultrahigh-intensity ultra-short-pulse laser technology is rapidly becoming a hotspot of interest for various scientific and technological powers, drawn by fusion fast ignition and many cross-cutting frontier disciplines and defense applications, with multiple picosecond and femtosecond pulse widths of beat-watt ultra-intense The laser device has been built or is under development, the Chinese Institute of Materials Science and Technology in real time to carry out the development of ultra-short ultra-intense pulsed laser device under this technological route.

Development of high power solid-state laser devices

         In 1964, Prof. Wang Kam-chang, then Vice President of the Chinese Academy of Biological Sciences, put forward the proposal of "using high energy and high power optical exciter to produce neutrons", which was positively responded by scientists such as Deng Ximing, who was engaged in the research of high power laser technology at the Shanghai Institute of Optics and Precision Mechanics (SIOP) of the Chinese Academy of Sciences, and the Chinese Academy of Sciences. Leader Zhang Jinfu's support, thus the initial conception and gradual formation of this research field with far-reaching implications. Since then, there has been a clear direction for the development of high-power laser technology in China, with the Shanghai Institute of Light and Machinery (SIOM) being the earliest research base, and with the strong support of SIOM, the China Institute of Materials Science and Technology (CIOM) has gradually become a research base for high-power laser technology.

         In the 1960s, both China and the United States began to research high power laser drivers for ICF, as shown in Figure 1, and by 1973, both countries had successfully developed laser drivers for ICF technology research. Unfortunately, during the 10 years or so of continuous international innovations and breakthroughs in laser technology and plasma physics, this research work in China was lost for a number of reasons. Nova device, China only started the pre-research work on large laser devices in the early 1980s. At this time, China's high-power laser technology was already lagging far behind that of the United States.

Links:

搜索
Search
  • skype
logo
Top
微信公众号