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Method of nonlinear crystal packaging and its application in diode pumped solid state lasers

A nonlinear crystal and optical nonlinear technology, which is applied to the components of solid-state lasers, nonlinear optics, lasers, etc., can solve difficult problems such as laser crystal bonding

Inactive Publication Date: 2012-05-30
C2C晶芯科技公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, direct bonding to laser crystals is difficult due to the limited cross-section of the bonding surface

Method used

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  • Method of nonlinear crystal packaging and its application in diode pumped solid state lasers
  • Method of nonlinear crystal packaging and its application in diode pumped solid state lasers
  • Method of nonlinear crystal packaging and its application in diode pumped solid state lasers

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Embodiment Construction

[0019] The present invention solves the above-mentioned problems by means described below.

[0020] In the first preferred embodiment, the bonding structure for the DPSS laser is as image 3 shown. Laser crystal 2 (for example, Nd:YVO 4 ) and nonlinear crystal 3 (for example, MgO:PPLN) are first bonded to substrates (silicon substrates) 5 and 6 respectively. Here, typical thicknesses (for example, 0.5 mm) can be used for laser crystals and nonlinear crystals, and the thickness of the Si substrate (for example, 0.5 mm to 2.5 mm) is properly selected so that the cross-sectional area is large enough for subsequent Crystal bonding. A large wafer size can be used for the bonding between the laser crystal 2 and the Si substrate 5 and the bonding between the nonlinear crystal 3 and the Si substrate 6, thereby reducing the overall manufacturing cost. Si substrates 5, 6 have high thermal conductivity and the same thickness. The bonds 7, 8 between the laser crystal 2 and the Si sub...

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Abstract

The present invention is related to methods of packaging optical nonlinear crystal with a periodically domain inversion structure (e.g. periodically poled MgO doped lithium niobate) which is bonded with a laser crystal (e.g. Nd doped YVO4) and to achieve efficient second harmonic generation in an intra-cavity configuration.

Description

technical field [0001] The present invention relates to a method of packaging optical nonlinear crystals based on quasi-phase matching (QPM) technology, which can be used to generate light in the wavelength range from UV to mid-IR. Background technique [0002] In the process of developing second harmonic (SHG) lasers based on QPM optical nonlinear crystals, optimized packaging of QPM crystals is necessary. Usually, a diode-pumped solid-state (DPSS) SHG laser consists of a pump laser diode (for example, a semiconductor laser diode with a lasing wavelength of 808nm), a laser crystal (for example, Nd-doped YVO 4 ), QPM crystals (eg, periodically poled lithium niobate doped with magnesium oxide or MgO:PPLN), and fiber output coupling mirror formation. Both laser crystals and QPM crystals are properly coated with high reflection (HR) or anti-reflection (AR, anti-reflection) coatings on the crystal faces, which can confine the fundamental frequency light in the laser cavity, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/108G02F1/35
CPCH01S3/0627H01S3/0612H01S3/1673G02F1/3558H01S3/109H01S3/025G02F1/37H01S3/1611H01S3/0621H01S3/0625H01S3/0405Y10T428/2495Y10T428/31511Y10T428/31678
Inventor 胡烨
Owner C2C晶芯科技公司