Fiber lasers ramp up the power
著者：Jeff Hecht
http://www.optoiq.com/articles/display/371319/articles/laser-focus-world/volume-45/issue-12/features/photonic-frontiers-fiber-lasers-fiber-lasers-ramp-up-the-power.html

IPGのファイバーレーザーに関する記事です。

【前文】
In the early days of the laser industry, the best way to reach high powers was to extract energy from a large volume of laser material. That’s still the case for some purposes, such as assembling large glass amplifiers to deliver 1.8 MJ pulses from the National Ignition Facility at the Lawrence Livermore National Laboratory. But for many industrial applications, the high-power laser medium of choice has become an optical fiber with an ytterbium-doped core.

Fiber-laser powers have come a long way since Elias Snitzer made the first one in 1963. In June IPG Photonics (Oxford, MA) reported continuous-wave single- mode output of 10 kW at Laser 2009 in Munich and at the Solid State and Diode Laser conference held by the Directed Energy Professional Society (DEPS) in Newton, MA. IPG has also built a 50 kW multimode fiber laser, which Bill Shiner, vice president for industrial markets, says Raytheon (Waltham, MA) has tested for potential weapons applications. But IPG’s bread-and-butter business is industrial materials-working, from cutting silicon wafers for solar cells to robotic welding of metal sheets.

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