Using an improved borosilicate glass with small third-order optical nonlinearities, i.e., nonlinear refractive index (NLRI) and nonlinear absorption coefficient (NLAC), as the matrix and comparative glass, two types of Ho3+-doped glass are prepared with a solid-phase smelting process at a relatively low temperature, and their third-order optical nonlinearities are measured by the closed-aperture Z-scan technique using nanosecond laser pulses at 532nm wavelength. It is found that the matrix glass possesses a positive third-order NLRI and a positive third-order NLAC, and both the third-order NLRI and NLAC of Ho3+-doped glasses are one order larger than those of the matrix glass, respectively. Also, an openaperture Z-scan experiment and an optical limiting experiment further demonstrate that the Ho3+-doped glasses have a high third-order NLAC. All the experimental results show that this Ho3+-doped glasses have good protection performance for the 532nm-laser.
Fu Jian Sun Li Liu Xiao-dong Song Zhao-yuan Chen Yue-e Liu Dong-ping
School of Mechanical Engineering,Dalian Jiaotong University,Dalian Liaoning 116028,China;Institute o School of Mechanical Engineering,Dalian Jiaotong University,Dalian Liaoning 116028,China, a School of Mechanical Engineering,Dalian Jiaotong University,Dalian Liaoning 116028,China,Institute Institute of Optoelectronic Technology,Dalian Nationalities University,Dalian Liaoning 116600,China; Institute of Infrared Optical Fibers and Sensors,Yanshan University,Qinhuangdao Hebei 066004,China; School of Mechanical Engineering,Dalian Jiaotong University,Dalian Liaoning 116028,China;Institute o