Polarization-dependent colored conical emission in a quadratically nonlinear medium
- 作者：Jie Bi ; feelingbj@hotmail.com ; Lina Zhou ; Anshou Zheng ; Tao Lv ; Dong Xiang
- 关键词：Supercontinuum conical emission ; Femtosecond laser pulse ; Conical angle ; Nonlinear X-wave model ; Cerenkov type phase matching model ; FWM model
- 刊名：Optics Communications
- 出版年：2012
- 期刊代码：50_00304018
- 类别：ph
- 出版时间：1 July, 2012
- 卷：285
- 期：15
- 页码：3316-3319
- 文件大小：944 K
摘要
Both supercontinuum conical emission (SCCE) and blue-green conical emission (CE) by means of second harmonic generation (SHG) were observed alternately in a 尾-barium borate (BBO) crystal induced by femtosecond laser pulses with vertical polarization state. Three theoretical models were analyzed to interpret the angular beam of SCCE. The experimental conical angles with different wavelengths in BBO crystal and BK-7 glass can be explained well by nonlinear X-wave model and Cerenkov type phase matching model other than four-wave mixing (FWM) model.