Characteristics of co-existence of third-order and transient thermally induced optical nonlinearities in nanosecond regime
| Autor: | Wen-Yuan Zhou, Shuqi Chen, Feng Song, Wei-Ping Zang, Jianguo Tian, Chunping Zhang, Zhi-Bo Liu |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Materials science
business.industry Physics::Optics Nanosecond Nanosecond pulse Laser Electromagnetic radiation Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Third order Optics law Transient (oscillation) Electrical and Electronic Engineering Physical and Theoretical Chemistry business Absorption (electromagnetic radiation) Beam (structure) |
| Zdroj: | Optics Communications. 245:377-382 |
| ISSN: | 0030-4018 |
| Popis: | We report the experimental results on characteristics of co-existence of third-order and transient thermally induced optical nonlinearities using a nanosecond pulse laser and CS2 solutions of nigrosine. Results show that thermally induced optical nonlinearity is very sensitive to linear absorption, beam waist size and pulsewidth. Numerical simulations obtained by solving simultaneously acoustic and electromagnetic wave equations, agrees basically with experimental results. Meanwhile, the transition of optical nonlinearity from self-focusing pattern to self-defocusing pattern was observed when the contribution from thermally induced optical nonlinearity exceeds that from third-order optical nonlinearity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect