• Chinese Journal of Lasers
  • Vol. 45, Issue 12, 1206003 (2018)
Liner Zou1、*, Ze Zhang1, Jiwu Fu1, and Baoxue Chen2
Author Affiliations
  • 1 Department of Physics, Nanchang University, Nanchang, Jiangxi 330031, China
  • 2 School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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    DOI: 10.3788/CJL201845.1206003 Cite this Article Set citation alerts
    Liner Zou, Ze Zhang, Jiwu Fu, Baoxue Chen. Photosensitivity and Optical Stopping Effect of Low-Loss As2S3 Optical Fiber Core under 532 nm Light Irradiation[J]. Chinese Journal of Lasers, 2018, 45(12): 1206003 Copy Citation Text show less

    Abstract

    The photosensitivity of a low-loss As2S3 chalcogenide glass fiber core under 532 nm near-bandgap light irradiation is experimentally investigated. The experimental results show that at the beginning of light irradiation, the photo-induced refractive index change of the fiber core first decreases rapidly towards the negative direction, and then recovers and increases gradually towards the positive direction with the extension of irradiation time. As for these two processes, the time duration and the refraction index change value are determined by light irradiation power. As the irradiation power increases to a certain threshold value, the photo-induced refractive index change shows a positive increment in the recovery process, and the refractive index change can be increased to about 3×10 -3 with the further increases of irradiation power and exposure time. In addition, the As2S3 fiber Bragg grating is experimentally fabricated and its central wavelength occurs blue shift-recovery-red shift during exposure. At the same time, the experimental results also disclose that the optical stopping phenomenon with a cut-off efficiency of about 55% is observed in the As2S3 fiber under near-bandgap light irradiation.
    Liner Zou, Ze Zhang, Jiwu Fu, Baoxue Chen. Photosensitivity and Optical Stopping Effect of Low-Loss As2S3 Optical Fiber Core under 532 nm Light Irradiation[J]. Chinese Journal of Lasers, 2018, 45(12): 1206003
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