| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Suppression of FM-to-AM Conversion in Broadband Third-Harmonic Generation of Nd:Glass Laser |
| CHEN Ying, QIAN Lie-Jia**, ZHU He-Yuan, FAN Dian-Yuan
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Department of Optical Science and Engineering, Laboratory for Advanced Materials, Fudan University, Shanghai 200433
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| Cite this article: |
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CHEN Ying, QIAN Lie-Jia, ZHU He-Yuan et al 2011 Chin. Phys. Lett. 28 044209 |
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Abstract Frequency modulation to amplitude modulation (FM-to-AM) conversion is important for controlling temporal shapes of high-power Nd:glass lasers in the application of fusion ignition. To suppress this FM-to-AM conversion effect in the process of broadband third-harmonic generation of Nd:glass laser, we report an efficient frequency-tripling scheme based on mixing narrowband and broadband pulses. Numerical results show that the FM-to-AM conversion in frequency conversion process can be suppressed effectively. For a required third-harmonic bandwidth of 1 THz, the defined relative modulation α in pulse intensity is as large as 180% in the conventional baseline design, while it will be reduced to only about 20% by using our proposed scheme.
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| Keywords:
42.65.Re
42.65.ky
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Received: 20 June 2010
Published: 29 March 2011
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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.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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