| Original Articles |
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Magnetostatic-Wave-Based Magneto-Optic Pulse Compression by Control of Phase Mismatching |
| WU Bao-Jian, GAO Xiang |
| Key Lab of Broadband Optical Fiber Transmission and Communication Networks (Ministry of Education), University of Electronic Science and Technology of China, Chengdu 610054 |
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| Cite this article: |
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WU Bao-Jian, GAO Xiang 2008 Chin. Phys. Lett. 25 4006-4008 |
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Abstract Microwave magnetostatic waves (MSWs) as moving gratings in magneto-optic (MO) film can lead to the Bragg diffraction of guided optical waves (GOWs). The MO coupling characteristics are responsible for the amplitude and phase frequency spectra of diffracted pulses and even result in the compression of chirped optical pulses in time domain. We theoretically investigate the noncollinear diffraction of linearly chirped Gaussian optical pulses by continuous magnetostatic forward volume waves in detail. For a given chirped optical pulse, with the increase of phase-mismatching slopes, the compression efficiency (CE) is gradually improved up to the maximum followed by the transition of diffracted pulses from single peak to multi peaks. The larger the chirp parameter is, the smaller the required phase-mismatching slope to achieve the maximal CE is. However, the rise of the chirp parameter or phase-mismatching slope reduces the relative peak intensity of the diffracted pulse. Lastly, it is pointed out that the phase-mismatching slope can be greatly increased by using the high-order modes of MSWs and GOWs.
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| Keywords:
42.65.Re
78.20.Ls
75.30.Ds
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Received: 22 April 2008
Published: 25 October 2008
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| PACS: |
42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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78.20.Ls
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(Magneto-optical effects)
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75.30.Ds
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(Spin waves)
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