彩色锥形辐射是超短脉冲激光在非线性介质中传输时产生的一种特殊的非线性现象。实验研究了飞秒脉冲激光诱导偏硼酸钡(BBO)晶体产生的彩色锥形辐射现象,建立了彩色锥形辐射产生的物理模型,模拟了辐射角与波长的变化,分析了彩色锥形辐射的光谱特性。实验获得清晰的彩色锥形辐射图样,观测了抽运光入射角、光强度对彩色锥形辐射的影响。减小抽运光强与增大入射角,均导致锥形辐射外环产生明显的红移。实验现象与理论模拟相吻合,进一步表明彩色锥形辐射源于二次谐波的自发参量转换。 Colored cone radiation is a special non-linear phenomenon that occurs when an ultra-short pulse laser propagates in a nonlinear medium. The chromatic cone radiation phenomenon induced by femtosecond pulsed laser induced barium metaborate (BBO) crystal was experimentally studied. The physical model of color cone radiation was established, the variation of radiation angle and wavelength was simulated, and the influence of color cone radiation Spectral characteristics. The clear color conical radiation pattern was obtained experimentally. The influence of incident light angle and color intensity on the color cone radiation was observed. Reducing the pumping light intensity and increasing the incident angle all lead to obvious redshift of the outer ring of the cone radiation. The experimental phenomena are in good agreement with the theoretical simulations, further demonstrating the spontaneous parametric conversion of the color cone radiation source from the second harmonic.