LD pumped QCW 355nm laser by extra-cavity sum-frequency-mixing using double synchronized wavelength lasers
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1.
College of Opto-Electronics Engineering, Changchun University of Science and Technology, Changchun 130022, China
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Received Date:
2013-12-25
Accepted Date:
2014-03-10
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Abstract
In order to get practical high power quasi-continuous wave (QCW) laser at 355nm, the 1064nm and 532nm QCW lasers were synchronized by radio frequency drive source with double channels via an acousto-optic modulator. The two wavelengths were coupled into type Ⅱ LBO crystal simultaneously by an achromatic lens and the ultraviolet laser at 355nm was generated. The highest output power of 355nm laser is 6.8W, pulse width is 67ns, conversion efficiency of the 355nm laser is about 1.56% when the injected electrical power is 436W and the repetition frequency is 6kHz. The results show that the high power 355nm QCW laser can be obtained by extra-cavity sum-frequency with double wavelength synchronized lasers.
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