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发表于 2017-1-26 00:56:39
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唉，看这种报道还是要看英文的才行，文科记者自己也不懂行，翻译得云里雾里的。
首先这个是高功率脉冲激光器，和里面提到的德州大学1PW激光器和日本LFEX 2PW激光器是同一类型，输出的激光脉冲功率都是PW级，这种激光并不是用来切钢板的，是用于高能物理和新材料研究，其中一个用途是用来做核聚变点火……
然后呢，上面说的那两个激光器一天只能射几次，每次发射的脉冲能量为150~200焦耳，持续时间不到1ps，由于持续时间非常短，所以算出来的峰值功率就很高了，然而其余大部分时间都是在积攒能量，平均功率非常低。
这个耗资4800万美元的新玩具，能以10Hz的频率连续发射每次100焦耳能量的高功率脉冲激光，所以是平均功率1kW的脉冲激光，并非连续的1kW激光。
https://www.afp.com/en/news/2265 ... owerful-super-laser
A team of British and Czech scientists on Tuesday said they had successfully tested a "super laser" they claim is 10 times more powerful than any other of its kind on the planet.
The so-called "high peak power laser" has a 1,000-watt average power output, a benchmark of sustained, high-energy pulses.
It has revolutionary potential in engineering, for hardening metal surfaces, processing semiconductors and micro-machining material.
The device was developed by Britain's Central Laser Facility (CLF) and HiLASE (High average power pulsed laser), a Czech state research and development project.
"It is a world record which is important," CLF director John Collier told AFP.
"It is good for putting things on the map, but the more important point is that the underlying technology that has been developed here is going to transform the application of these high power, high energy lasers," Collier added.
Named "Bivoj" after a mythical Czech strongman, the laser is "10 times as powerful" as any other of its type currently in use, HiLASE physicist Martin Divoky told AFP at the testing facility in Dolni Brezany near Prague.
HiLASE director Tomas Mocek told AFP that Bivoj broke the "magical barrier" of 1,000 watts in output on December 16, setting a world record for lasers of its type.
"It's a huge step forward, like an Olympic victory," he added.
Weighing in at around 20 tonnes and costing 44 million euros ($48 million), Bivoj will have applications in the aeronautics, automotive and power sectors, according to the CLF and HiLASE specialists.
Mocek told AFP that Bivoj was fundamentally different from so-called peak power lasers.
There are two behemoths of this kind -- the one-petawatt Texas Petawatt Laser in Austin and the two-petawatt Laser for Fast Ignition Experiments (LFEX) in Osaka, Japan. One petawatt equals one million billion watts
Those lasers "have a very high peak power, but they can only reach it several times a day," Mocek said.
"They do not have so-called 'average power'. This is a combination of the repetition rate and the energy. Our laser has the highest average power, which is important. The repetition rate in Osaka and Austin is significantly lower."
Its creators say they hope to explore the laser's potential during tests planned at the Dolni Brezany facility later this month.
Mocek told AFP that there are also plans to commercialise the laser in the second half of the year. |
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