| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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A Phase-Controlled Optical Parametric Amplifier Pumped by Two Phase-Distorted Laser Beams |
REN Hong-Yan, QIAN Lie-Jia, YUAN Peng, ZHU He-Yuan, FAN Dian-Yuan
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| Department of Optical Science and Engineering, Advanced Materials Laboratory, Fudan University, Shanghai 200433 |
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| Cite this article: |
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REN Hong-Yan, QIAN Lie-Jia, YUAN Peng et al 2010 Chin. Phys. Lett. 27 054202 |
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Abstract We theoretically study the phase characteristic of optical parametric amplification (OPA) or chirped pulse OPA (OPCPA) pumped by two phase-distorted laser beams. In the two-beam-pumped optical parametric amplification (TBOPA), due to spatial walk-off, both of the pump phase distortions will be partly transferred to signal in a single crystal so as to degrade the signal beam-quality, which will be more serious in high-energy OPCPA. An OPA configuration with a walkoff-compensated crystal pair is demonstrated for reducing the signal phase distortion experienced in the first stage and ensuring the signal phase independent of two pump phase distortions through the second crystal, hence maintaining the signal beam-quality. Such a TBOPA is similar to the conventional quantum laser amplifier by means of eliminating its sensitivity to the phase and number of the pump beams.
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| Keywords:
42.65.Yj
42.65.Re
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Received: 26 November 2009
Published: 23 April 2010
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| PACS: |
42.65.Yj
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(Optical parametric oscillators and amplifiers)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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