Volume 5 Issue 5
Oct.  2012
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ZHANG Xin-miao, WEI Guang-yao, WANG Ying-shuai, WANG Rui, YU Yong-jiang, YAO Wei-guo, DONG Wen-fei. Design of a high-precision Z-scan measurement system based on a virtual instrument[J]. Chinese Optics, 2012, 5(5): 531-536. doi: 10.3788/CO.20120505.0531
Citation: ZHANG Xin-miao, WEI Guang-yao, WANG Ying-shuai, WANG Rui, YU Yong-jiang, YAO Wei-guo, DONG Wen-fei. Design of a high-precision Z-scan measurement system based on a virtual instrument[J]. Chinese Optics, 2012, 5(5): 531-536. doi: 10.3788/CO.20120505.0531

Design of a high-precision Z-scan measurement system based on a virtual instrument

doi: 10.3788/CO.20120505.0531
  • Received Date: 11 Jun 2012
  • Rev Recd Date: 13 Aug 2012
  • Publish Date: 10 Oct 2012
  • A sensitive Z-scan measurement system using a femtosecond Nd: YAG laser(800 nm) as the excited light and based on Labview is reported. Under the control of Labview, the digital oscilloscope TDS3012 and the micro-translation stage are used to measure the light intensity, and the Z-scan function is realized. By taking a 800 nm fs laser from a Nd: YAG fs amplifier as a detecting light, the two transmittance intensities of light is measured by passing it through a thin nonlinear sample with a digital oscilloscope. Then both the nonlinear refractive index and nonlinear absorption coefficient can be obtained. The nonlinear absorption coefficient of Rhodamine 6B at 800 nm was measured. The results produced a two-photon absorption cross-section of 6.8 GM(GM=10-50 cm4 s photon-1 molecule-1). The system is shown to be reliable by comparison of our measured results with the those obtained from other different measuring methods.

     

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