| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Generation of Femtosecond Laser Pulse at 1053 nm with Contrast of 10?11 by Optical-Parametric Amplification |
| SHEN Zhong-Wei, WANG Zhao-Hua**, ZHANG Wei, FAN Hai-Tao, TENG Hao, WEI Zhi-Yi** |
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
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| Cite this article: |
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SHEN Zhong-Wei, WANG Zhao-Hua, ZHANG Wei et al 2014 Chin. Phys. Lett. 31 014207 |
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Abstract A high contrast 1053 nm femtosecond laser pulse with free background is demonstrated based on non-collinear optical-parametric amplification (NOPA). By permuting the signal and idler in two stages of NOPAs, 48.2 fs, 62 μJ laser pulse at 1053 nm with contrast ratio of 2.3×10?11 is obtained within the time scale of sub-5 ps. The beam quality factors M2 for tangential and sagittal directions are 1.59 and 1.30, respectively. This work not only proves a feasible way to generate a clean femtosecond laser pulse but can also be employed as an ideal frontend for ultrashort ultrahigh intensity Nd:glass-based laser systems.
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Received: 23 October 2013
Published: 28 January 2014
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| PACS: |
42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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42.65.Yj
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(Optical parametric oscillators and amplifiers)
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42.65.Lm
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(Parametric down conversion and production of entangled photons)
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