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Optical element having alternating refractive index changes, and use thereof

A technology of refractive index change and optical components, applied in optics, electrical components, nonlinear optics, etc., can solve problems such as the absence of absorbers

Active Publication Date: 2020-10-09
レーザーツェントルムハノーバーイーブイ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, there are no practically usable absorbers in the wavelength range below 780nm

Method used

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  • Optical element having alternating refractive index changes, and use thereof
  • Optical element having alternating refractive index changes, and use thereof
  • Optical element having alternating refractive index changes, and use thereof

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Embodiment Construction

[0039] exist figure 1 The optical element 1 according to the invention, illustrated schematically in Between and 5 , and between 5 and 2 , a sudden change in the refractive index 6 , here due to the different refractive indices of the layers 2 to 5 , is formed in each case. The refractive index changes 6 follow each other along the optical axis 7 and are arranged at defined intervals for light 8 incident along the optical axis 7 with a wavelength λ, so that a plurality of regions 9 to 11 , 13 of the device 1 follow each other along the optical axis 7 and 14 satisfy different functions. In the three regions 9, 10 and 11, the spacing between the refractive index changes is equal to λ / 4, that is to say the optical thicknesses of layers 2 and 3 are each a quarter of the design wavelength λ. Regions 9 , 10 and 11 thus form reflector 12 for light 8 . Between two of the reflectors 12 in each case a resonator 15 for light 8 with a design wavelength λ is formed in the two regions 13...

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Abstract

In an optical element (1), alternating refractive index changes (6) in at least three regions (9, 10, 11, 13, 14), which are successive along an optical axis (7), form reflectors (12) and, between ineach case two of the successive reflectors (12), an optical resonator (15) for light (8) having a design wavelength that is incident along the optical axis (7). At least one of the resonators (15) comprises a Kerr active material. At least two of the resonators (15) differ in non-linear components IRes(i)*n2(i) of their total refractive indices n(i) = n0(i)+IRes(i)*n2(i) by at least 50% of the, interms of absolute value, smaller of the two non-linear components IRes(i)*n2(i), wherein IRes(i) is an intensity IRes(i) of the light (8) having the design wavelength and radiated along the optical axis (7) that results from the respective resonator (15) being arranged between the reflectors (12) and n2(i) is a non-linear refractive index of the respective resonator (15).

Description

technical field [0001] The invention relates to an optical element having an optical axis, a design wavelength Alternating refractive index variations along the optical axis, and other features of the preamble of independent claim 1 . Furthermore, the invention relates to the use of such optical elements in laser resonators. Background technique [0002] From EP 0 541 304 B1 an optical device is known which comprises a first reflective element and a second reflective element which is spaced apart from the first reflective element, for between the first reflective element and the second reflective element Construct a Fabry-Pérot-Etalon with multiple optical resonance frequencies. A semiconductor material of the optical device arranged between the first reflective element and the second reflective element has a nonlinear optical absorption at a predetermined optical frequency. The optical frequency lies between two adjacent optical resonance frequencies such that it lies e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/355G02F1/31H01S3/082H01S3/11G02F1/35
CPCG02F1/31G02F1/355H01S3/082H01S3/11H01S3/1112G02F1/3511G02F1/3523H01S3/08059H01S3/105G02B5/0816G02B5/284G02B5/206
Inventor M·朱佩D·里斯陶
Owner レーザーツェントルムハノーバーイーブイ