温度对双光子光折变介质中光伏孤子特性的影响

Temperature Effects on the Photovoltaic Spatial Solitons in Two-Photon Photorefractive Media

具有双光子光折变效应的光折变介质温度的变化对光伏孤子性质具有影响。通过光伏空间孤子的演化方程得到的亮和暗光伏空间孤子解与温度相关,在室温范围内,双光子光折变介质中空间孤子的光强和强度半峰全宽(FWHM)均受温度影响。随着介质温度的升高,双光子光折变介质支持光强较小的光伏空间孤子;在较大光强情况下,双光子光折变介质支持强度半峰全宽较小的光伏空间孤子;在小光强情况下,双光子光折变介质支持强度半峰全宽较大的光伏空间孤子。即可以通过控制光折变介质的温度来控制介质中光伏孤子的空间形态,从而在光折变介质中形成稳定的光伏空间孤子。

The characteristic of the photovoltaic spatial solitons in two photon photorefractive media is influenced by the temperature of the media. The bright and dark spatial soliton solutions of the evolution equation of spatial solitions are related to the temperature. The intensity profile and the full width at half maximum （FWHM） of photovoltaic spatial solitons in two photon photorefractive media are dependent on the temperature of the media in the room temperature range. With the raising of the temperature of the two-photon photorefractive media, the photovoltaic spatial solitons with small intensity can be supported, moreover, the photovohaic spatial solitons with small FWHM can be established under the large intensity case, and the photovoltaic spatial solitons with wider FWHM can be formed under the small intensity case. That is to say that the profiles of the photovohaic spatial solitons can be controlled by the temperature, so as to form the steady photovoltaic spatial solitons in the twophoton photorefractive media.