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Conference and Journal Papers

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"A novel multi-channel dispersion slope compensation using sampled FBG", WOC2002 IASTED International Conference, 2002

  • A novel multi-channel dispersion slope compensator using sampled FBG


    Author: J.J. Pan, Feng Qing Zhou, Yisi Liu, Claire Gu, Liang Dong, Albert Li, Chunmeng Wu

    Publication: Printed in WOC2002 IASTED International Conference, Banff, Alberta, Canada, July 17-19 2002

    Abstract: A novel dispersion slope compensator is proposed and fabricated using a sampled fiber grating. The dispersion slope of this compensator is demonstrated to match that of Corning LS fiber for a multi-channel 50GHz WDM system.

"(Co-Author) Applications of photorefractive materials in information storage, processing and communication", Optical Materials

  • Applications of photorefractive materials in information storage, processing and communication

    Author:J.J. Pan, Claire Gu, Yuan Xu, Yisi Liu, Feng Qing Zho, Henry He

    Publication: Published in Optical Materials

    Abstract: Photorefractive materials, including traditional electro-optic photorefractive crystals as well as photopolymers and photosensitive glasses, have demonstrated their potential in information systems. In this paper, we describe several applications of various photorefractive materials in information storage, processing, and communication systems. Specifically, we briefly review the applications of the traditional electro-optic photorefractive crystals in optical information processing and volume holographic data storage, then discuss our recent works on the applications of photopolymers, holographic polymer dispersed liquid crystals, and photosensitive glasses in photonic devices for optical fiber communications.

"(Co-Author) Application of new photorefractive materials in fiber optic devices, SPIE Annual Meeting", Seattle, 2002

  • Applications of new photorefractive materials in fiber optic devices

    Author: J.J. Pan, Claire Gu, Yuan Xu, Yisi Liu, Feng Qing Zho, Henry He

    Publication: Printed in SPIE annual meeting, Seattle, 2002, pp. 4803-17, SPIE proceedings

    Abstract: The photorefractive effect is a phenomenon in which the local index of refraction is changed by the spatial variation of the light intensity. Although the phrase "photorefractive effect" has been traditionally used for such effects in electro-optic materials, new materials, including photopolymers and photosensitive glasses, have been developed in recent years and are playing increasingly important roles in optical fiber communication systems.

    Photopolymers in combination with liquid crystals are ideal materials for wavelength selective tunable devices. The improved optical quality and large dynamic range of photopolymers make them promising materials for holographic recording.

    Holographic gratings recorded in photopolymers can be employed as distributed Bragg reflectors (DBR). The large birefringence of liquid crystals can be used to tune the index of refraction to cover a large wavelength range. In addition, the combination of photopolymer and liquid crystal also leads to a new material known as holographic polymer dispersed liquid crystal (H-PDLC) which provides a medium for switchable holograms.

    Photonic devices made of these materials can be easily incorporated into an optical fiber system because of the low index of refraction of polymers and liquid crystals, and their relatively easy processing techniques. Besides photopolymers, photosensitive glasses are also promising for applications in fiber optic systems.

    Fiber Bragg gratings (FBG) have been used as bandpass filters and dispersion compensators. In this paper, we describe the applications of photopolymers, H-PDLCs, and FBGs in fiber optic devices. Specifically, we will describe our recent works on photonic devices such as filters, switches, and dispersion compensators for WDM systems.