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Wavelength Converter Based on Linearly Chirped Gratings in Lithium Niobate Through Cascaded Second-Order Processes |
| GAO Shi-Ming;YANG Chang-Xi;JIN Guo-Fan |
| State Key Laboratory of Precision Measurement Technology and
Instruments, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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GAO Shi-Ming, YANG Chang-Xi, JIN Guo-Fan 2003 Chin. Phys. Lett. 20 1272-1274 |
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Abstract We report a wavelength converter based on linearly chirped gratings in a lithium niobate crystal through cascaded second-order nonlinear processes. The influence of the chirp coefficient on the conversion bandwidth and the efficiency is analysed. The exact phase matching point is optimized at the 0.33 times of the waveguide total length. When the waveguide length is 3cm, the bandwidth of the linearly chirped grating increases 42% with the efficiency penalty of 1.7 dB compared with the periodic grating. At the same mean conversion efficiency of -1.4 dB via adjusting the waveguide total lengths, the bandwidth of the linearly chirped grating is 36% broader than the periodic grating.
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| Keywords:
42.65.Ky
42.79.Nv
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Published: 01 August 2003
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| PACS: |
42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.79.Nv
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(Optical frequency converters)
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