| 双光子吸收光谱 |
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| 引用本文： | 雷虹,黄振立,汪河洲,田玉鹏.双光子吸收光谱[J].光谱学与光谱分析,2002,22(4):559-561. |
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| 作者姓名： | 雷虹 黄振立 汪河洲 田玉鹏 |
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| 作者单位： | 1. 中山大学超快速激光光谱学国家重点实验室,广东,广州,510275
2. 山东大学晶体材料国家重点实验室,山东,济南,250100 |
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| 基金项目： | 国家自然科学基金 (批准号 :1993 4 0 0 2和 198740 83 )，国家重点基础研究规划项目，广东省自然科学基金资助项目 |
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| 摘 要： | 本文报道以皮秒脉冲激光抽运的光参量放大器为宽带可调谐激发光源，直接测量非线性光学材料的双光子吸收谱的方法。光参量放大器不但可调谐谱带很宽，而且可用一对尼科尔棱镜很容易地实现全波段功率足够强和相等，使此方法的测量结果准确可靠。用此方法研究了一个新有机化合物的双光子吸收谱。实验结果表明所测的新有机化合物在很宽的波长范围内呈现出很大的双光子吸收截面。
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| 关 键 词： | 双光子吸收光谱 光参量放大器 双光子吸收截面 非线性光学材料 |
| 文章编号： | 1000-0593(2002)04-0559-03 |
| 修稿时间： | 2002年1月18日 |
Two-photon Absorption Spectrum |
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| Hong Lei,Zhen-li Huang,He-zhou Wang,Yu-peng Tian.Two-photon Absorption Spectrum[J].Spectroscopy and Spectral Analysis,2002,22(4):559-561. |
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| Authors: | Hong Lei Zhen-li Huang He-zhou Wang Yu-peng Tian |
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| Institution: | State Key Laboratory of Ultrafast Laser Spectroscopy, Zhongshan University, Guangzhou 510275, China. |
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| Abstract: | Two photon absorption (TPA) spectrum of a new organic compound has been directly measured by an approach of using tunable laser from an optical parameter amplifier as an excitation source The output intensity of optical parameter amplifier can cover a broad spectra range of 400-2 000 nm,and identical intensity in the whole spectral range can be easily adjusted.Therefore,the measurement based on this method is directly and reliable.The experimental results show that this compound exhibit large TPA cross section in a broad spectral range from 750 to 1 100 nm The profiles of TPA spectrum is quite similar to that of the linear absorption spectra The peak wavelength of TPA band has a little blue shift compared with the twice of the peak wavelength of the linear absorption due to the different selection rules for two photon transition and one photon transition |
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| Keywords: | Two photon absorption spectrum Optical parameter amplifier Two photon cross section |
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