Invention Grant
- Patent Title: Laser with highly efficient gain medium
- Patent Title (中): 激光与高效增益介质
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Application No.: US12058564Application Date: 2008-03-28
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Publication No.: US07720121B2Publication Date: 2010-05-18
- Inventor: Xiaoyuan Peng , Wensheng Ren
- Applicant: Xiaoyuan Peng , Wensheng Ren
- Applicant Address: US OR Portland
- Assignee: Electro Scientific Industries, Inc.
- Current Assignee: Electro Scientific Industries, Inc.
- Current Assignee Address: US OR Portland
- Agency: Stoel Rives LLP
- Main IPC: H01S5/00
- IPC: H01S5/00

Abstract:
High-power, diode-pumped solid state (DPSS) pulsed lasers are preferred for applications such as micromachining, via drilling of integrated circuits, and ultraviolet (UV) conversion. Nd:YVO4 (vanadate) lasers are good candidates for high power applications because they feature a high energy absorption coefficient over a wide bandwidth of pumping wavelengths. However, vanadate has poor thermo-mechanical properties, in that the material is stiff and fractures easily when thermally stressed. By optimizing laser parameters and selecting pumping wavelengths and doping a concentration of the gain medium to control the absorption coefficient less than 2 cm−1 such as the pumping wavelength between about 910 nm and about 920 nm, a doped vanadate laser may be enhanced to produce as much as 100 W of output power without fracturing the crystal material, while delivering a 40% reduction in thermal lensing.
Public/Granted literature
- US20090245317A1 LASER WITH HIGHLY EFFICIENT GAIN MEDIUM Public/Granted day:2009-10-01
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