Single-layer broadband antireflective coating for high power laser amplifier

LV Haibing; ZHAO Songnan; YAN Hongwei; WANG Tao; YAN Lianghong

doi:10.7510/jgjs.issn.1001-3806.2016.01.009

In order to obtain broadband antireflective single layer coating for high power laser amplifiers, stabilized SiO2 sol system with more widely particle size distribution was prepared from silica sol doped and regulated by organic polymer polyvinylpyrrolidone(PVP). Single-layer broadband antireflective coating was developed by sol-gel dipping method. The properties of sol were measured by nanoparticle analyzer and viscometer, the transmittance was measured by spectrophotometer and the coating structure was measured by X-ray spectrometer. The results indicate that the introduction of PVP into silica sol leads to wider distribution of silica sol particles, which makes the coatings have the graded characteristics of refractive index. Thus the coating is broadband and antireflective. The inside transmittance of coatings is higher than 99% in the 550nm~950nm. The single-layer broadband antireflection coating has the stable film performance and can be put to use without post-processing. The single-layer anti-refractive coating meets the requirement of high power laser amplifiers.

Single-layer broadband antireflective coating for high power laser amplifier

1. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

Received Date: 2014-10-20

Accepted Date: 2014-12-04

Available Online: 2016-01-25

Abstract: In order to obtain broadband antireflective single layer coating for high power laser amplifiers, stabilized SiO2 sol system with more widely particle size distribution was prepared from silica sol doped and regulated by organic polymer polyvinylpyrrolidone(PVP). Single-layer broadband antireflective coating was developed by sol-gel dipping method. The properties of sol were measured by nanoparticle analyzer and viscometer, the transmittance was measured by spectrophotometer and the coating structure was measured by X-ray spectrometer. The results indicate that the introduction of PVP into silica sol leads to wider distribution of silica sol particles, which makes the coatings have the graded characteristics of refractive index. Thus the coating is broadband and antireflective. The inside transmittance of coatings is higher than 99% in the 550nm~950nm. The single-layer broadband antireflection coating has the stable film performance and can be put to use without post-processing. The single-layer anti-refractive coating meets the requirement of high power laser amplifiers.

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Reference (17)

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Single-layer broadband antireflective coating for high power laser amplifier

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