Study on the photosensitivity of birefringent grating in copolymer optical fiber with high concentration

Hui Ma, Zengchang Li, Hai Ming, Qijin Zhang, Hwa Yaw Tam, Yongsheng Zhang, Dong Wang, Douguo Zhang, Tao Zhang, Pei Wang, Jianping Xie

Research output: Journal article publicationConference articleAcademic researchpeer-review


A novel copolymer optical fiber with high azobenzene concentration is reported (more than 3.2 mol %). The orientation process of the preform was fitted with corrected bi-exponential equation. Compared with the doped one, the photosensitivity of this kind of copolymer optical fiber preform is analyzed. The influence of azobenzene concentrations and write conditions on photosensitivity of copolymerized PMMA was analyzed. Then, long-period of 120um birefringent grating was fabricated in the single mode fiber with core refractive index of 1.485 (at wavelength of 1.5um), and relative index difference A of 0.008. The duty cycle is 50%, and the refractive index change in the exposed area is about 4×10-4for the ordinary or extraordinary ray.
Original languageEnglish
Article number58
Pages (from-to)373-379
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberPART 1
Publication statusPublished - 15 Jun 2005
EventOptoelectronic Devices and Integration - Beijing, China
Duration: 8 Nov 200411 Nov 2004


  • Birefringent grating
  • Copolymer optical fiber
  • Photosensitivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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