Hamamatsu Photonics announced on the 28th that in an experiment, it has achieved an average laser power of 2 kilowatts, which can irradiate 200-joule pulsed lasers at a rate of 10 hertz (10 times per second). Compared to 2023, the optical energy density of this experiment is more than twice that of 2023, and according to the company, it is the highest power for a solid-state laser excited by a semiconductor laser (LD) in the world. He said that he was able to clarify a technical challenge in achieving the goal of laser fusion power generation, which is to irradiate 28 kilojoules of pulsed lasers at 10 hertz within one year.
In this experiment, to increase the laser power, the excitation power of the LD was increased to 1.5 times. To suppress the deformation and degradation of the "medium" that amplifies the laser due to heat generated at that time, we improved the unique cooling structure to reduce the impact.
The power limit value at which the amplified laser damages internal optical components of the device was also confirmed.
This experiment was conducted at the Central Research Institute's Industrial Development Research Center of the company (in the Central Ward of Hamamatsu City).
Original article: https://www.toutiao.com/article/1842063016947724/
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