Control of Thermal Lensing Effect in Transparent Liquids by Femtosecond Laser Pulses

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概要

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• The thermal lensing effect in transparent (linear and nonlinear) molecular liquids can be modulated by disrupting continuously output 82 MHz 28 fs laser pulses at 800 nm to form trains of various widths ($\tau_{\text{t}}$) with respect to the thermal diffusivity time $\tau_{\text{th}}$ ($\sim 2$ ms). We present nonlinear refraction results for CHBr3 (bromoform) obtained by the $Z$-scan technique. The results show that the thermal lensing effect increases with $\tau_{\text{t}}$ when $\tau_{\text{t}}$ is less than $\tau_{\text{th}}$, but becomes steady when $\tau_{\text{t}}$ exceeds $\tau_{\text{th}}$ and reaches 30 ms. The proposed technique of modulating the thermal lensing effect by varying $\tau_{\text{t}}$ has great application potential in information photonics and optoelectronic devices, such as variable optical attenuators, holographic recording media, optical limiters and optical switches.

• 2009-09-25

著者

• Yang Sidney

  Institute Of Photonics Technologies Department Of Electric Engineering National Tsing Hua University

• Kuo Sou-Zi

  Department of Physics, National Chung Cheng University, Chiayi 621, Taiwan

• Li Yi-Ci

  Department of Physics, National Chung Cheng University, Chiayi 621, Taiwan

• Tang Jaw-Luen

  Department of Physics, National Chung Cheng University, Chiayi 621, Taiwan

• Wei Tai-Huei

  Department of Physics, National Chung Cheng University, Chiayi 621, Taiwan

• Wang Jian-Neng

  Department of Construction Engineering, National Yunlin University of Science and Technology, Douliou 640, Taiwan

関連論文

• Software Lens Compensation Applied to Athermalization of Infrared Imaging Systems
• Control of Thermal Lensing Effect in Transparent Liquids by Femtosecond Laser Pulses

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