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Kaoru Nakajima Yuki Komai Eriko Watanabe Fumi Moritsuka Shimako Anzai Kashiko Kodate 《Optical Review》2007,14(4):201-207
We designed and developed a volume phase holographic (VPH) grism with high resolution and high efficiency in the near-infrared
light domain (1550 nm) to be applied as a wavelength de-multiplexing device of a photonic network. In order to achieve both
diffraction efficiency of over 80% and wavelength resolution of 0.08 nm, we newly designed and fabricated a VPH grism with
high efficiency and high wavelength resolution in near-infrared wavelength region by sandwiching a VPH grating between prisms.
An active feedback control technique was introduced to a two-beam interference exposure system, and we also applied it to
a wavelength de-multiplexing device for a photonic network. Consequently, a VPH grism was successfully fabricated with diffraction
efficiency of over 80% by employing the Bragg condition of 1550 nm at the incident wavelength from 1530 to 1570 nm, and high
refractive index modulation of 0.047 was confirmed. 相似文献
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在啁啾脉冲放大(CPA)系统中, 脉冲的展宽是实现安全有效放大的重要保证. 本文介绍了一种新型的由色散棱镜与光栅组合而成的反射式棱栅对展宽器. 并利用光线追迹法对色散进行了数值模拟, 测量实验结果验证了理论计算的正确性. 在此基础上, 分析了以棱栅对为展宽器和ZF7玻璃材料为压缩器的下啁啾(down-chirped)脉冲放大系统中的色散比较传统的上啁啾脉冲放大系统, 结果表明棱栅对可以同时提供负的二阶色散和三阶色散, 这样能更好地补偿放大器中材料的高阶色散, 从而获得近傅里叶变换极限的压缩脉冲. 此外以块材料作为压缩器不仅提高了传输效率, 而且简化了实验装置, 增强了系统的稳定性. 这样的展宽压缩组合在高重复频率的飞秒啁啾脉冲放大系统中具有明显优势.
关键词:
反射式棱栅对
啁啾脉冲放大
色散
飞秒脉冲 相似文献
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