Polarization measurement method for wrapping edge interface residual reflection of laser gain medium
A technology of laser gain and residual reflection, applied in the measurement of scattering characteristics, etc., can solve problems such as absorption and scattering loss that cannot be eliminated
Active Publication Date: 2015-07-15
HEFEI ZHICHANG PHOTOELECTRIC TECH
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Problems solved by technology
This method cannot eliminate the absorption and scattering loss inside the sample and the reflection of the laser glass and air interface, so that the measured value is often smaller than the actual residual reflection value
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[0076] Among various laser glass materials with amplification function, neodymium glass has become the most important laser glass material because it can generate laser light at room temperature, has small temperature quenching effect, high optical pump absorption effect string and high quantum efficiency of luminescence. In particular, ultra-large-sized neodymium glass has become the most mature and reliable amplification medium for high-power laser systems, and is widely used in various high-power laser devices in the world, such as the National Ignition Device of Livermore Laboratory in the United States and Shenguang II and III in my country. device etc.
[0077] Therefore, the following specific combination of Figure 5 , and take the measurement of the residual reflectivity of the neodymium glass-encased interface as an example to further elaborate the present invention, but this should not limit the protection scope of the present invention.
[0078] See Figure 5 , th...
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The invention discloses a polarization measurement method and an apparatus for wrapping edge interface residual reflection of a laser gain medium. A residual reflection model of a laser glass wrapping edge interface is simplified by introducing a concept of equivalent admittance; a polarization state and a phase position of elliptically polarized light can be changed after the elliptically polarized light is subjected to interfacial reflection of the laser glass and the equivalent admittance; residual reflectance of p light and s light can be solved out through the changes of the polarization state and the phase position; and finally a total residual reflectance of the laser glass wrapping edge interface can be obtained; and an incidence angle and an incidence point of incidence light are changed by precise positioning of a laser glass clamping device, so that the residual reflection of the laser glass wrapping edge interface under different incidence angles and different measurement points can be measured conveniently.
Description
technical field [0001] The invention relates to the field of laser gain medium measurement, in particular to a polarization measurement method for residual reflection of laser glass material package boundary surface with amplification function. Background technique [0002] Laser gain medium is widely used in various high-power and high-energy lasers, and has become the most important laser working substance. Laser working substances are divided into solid, liquid and gas. Among them, solid-state laser is the most important one. It not only has a high density of activated ions, a wide frequency of oscillation, and can generate light pulses with narrow spectral lines, but also has good mechanical properties and stability. chemical properties. [0003] The basic conditions that the laser gain medium used for solid-state lasers should have are: suitable spectral characteristics, small excited state absorption, good optical uniformity and stability, and good physical and chemic...
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IPC IPC(8): G01N21/55
Inventor 董敏涛吴周令陈坚
Owner HEFEI ZHICHANG PHOTOELECTRIC TECH