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采用非同时读出条件下晶体两波耦合实验装置,在相同的入射光参量下,研究了激光波长(λ)对Ce:KNSBN晶体两波耦合增益系数(Γ)、衍射效率(η)、响应时间及光扇效应入射光强度阈值的影响。结果显示,激光波长不同时,Γ、η、响应时间随光入射角2θ的演化趋势相同,但不同波长光入射时,对应相同的2θ,Γ、η及响应时间不同;激光波长不同时,Ce:KNSBN晶体中光扇效应的入射光强度阈值不同,λ为532nm时,阈值为38mW/cm~2,λ为632.8nm时,阈值为26mW/cm~2。
Under the same incident light parameters, the effects of laser wavelength (λ) on the coupling coefficient of gain (Γ), diffraction efficiency (η), response of two waves of Ce: KNSBN crystal Time and light fan effect incident light intensity threshold. The results show that when the laser wavelength is different, the evolution trend of Γ, η, and response time with the incident angle of 2θ is the same, but the same 2θ, Γ, η and response time are different when different wavelengths of light are incident. : KNSBN crystal light fan effect of the incident light intensity threshold is different, λ is 532nm, the threshold is 38mW / cm ~ 2, λ is 632.8nm, the threshold is 26mW / cm ~ 2.