Erbium-doped active fiber all-fiber laser test system for high power and testing method thereof

Abstract

The invention relates to an erbium-doped active fiber all-fiber laser test system for high power and a testing method thereof. 915nm laser is produced through laser pumping; the laser is combined to afiber through a forward beam combiner; the 915nm pumping laser converts 915nm pumping light input previously into 1080nm laser through a resonance cavity structure comprising a high reflective grating, an active fiber and a low reflective grating; the converted 1080nm laser filters all pumping light in a cladding layer through a cladding light stripper; 976nm pumping light produced through laserpumping and the 1080nm laser passing the cladding light stripper are combined in a fiber through a beam combiner; the 976nm pumping light and the 1080nm laser pass a cladding light adapter at the sametime, then 976nm pumping light in the cladding layer in the fiber is converted into 1080nm laser in a core layer through a to-be-tested active fiber; and finally, remaining pumping light in the cladding layer is stripped through the cladding light stripper, and all 1080nm laser is output to an optical power meter.

Description

technical field [0001] The invention relates to the technical field of optical fiber testing, in particular to a high-power ytterbium-doped active fiber all-fiber laser testing system and a testing method thereof. Background technique [0002] Ytterbium-doped active fiber lasers have been widely used in industrial processing, weapons and medical equipment and other fields due to their advantages of high light-to-light conversion efficiency, high stability and high beam quality. Among them, the large mode field double-clad ytterbium-doped active fiber, which is the most important component in the Yb-doped active fiber laser, its performance evaluation and improvement have a great impact on the performance of the fiber laser. Among them, directly connecting the Yb-doped active fiber to the fiber laser test system for testing is the most effective means to evaluate the performance of the active fiber. [0003] CN108225745A provides a space test method using a space coupling me...

AI Technical Summary

Problems solved by technology

However, limited by the size factor, a size of ytterbium-doped active fiber must use matching laser devices with the same type of size design requirements to accurately evaluate the laser performance of the fiber, and often a set of test equipment costs more than one million

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