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首页> 美国政府科技报告 >Spectral Holography Using Bulk Photo-Refractive Crystals for High-Speed LightwaveProcessing
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Spectral Holography Using Bulk Photo-Refractive Crystals for High-Speed LightwaveProcessing

机译：使用块状光折射晶体进行高速光波加工的光谱全息术

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The ultimate objective of this project is to assess the use of bulkphotorefractive crystals in a femtosecond spectral holography setup to control and shape femtosecond pulses. By recording a hologram using near infrared light for which the crystals have high sensitivity, and reading out the holograms using 1.5 microns light, it should be possible to generate shaped pulses sequences at the 1.5 microns wavelength important for high speed fiber communications. One potential difficulty with this approach is the limited optical bandwidth expected for readout of a hologram recorded using a different wavelength, which could limit the minimum pulse duration accessible using this approach. We have performed a theoretical and experimental investigation of the optical bandwidth of bulk holograms read out using broadband femtosecond pulses. Experiments performed using a bulk InP:Fe photorefractive crystal verily the theoretically predicted variation of bandwidth with holographic grating period. Our experiments show that by using a grating period of 10 microns, more than enough bandwidth is available for processing of 100 femtosecond pulses. These results confirm the viability of the proposed pulse shaping approach based on bulk holographic media inside a spectral holography apparatus.

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