Pump-induced refractive index modulation and dispersions in Er3+-doped fibers

Carsten Thirstrup, Yuan Shi

    Research output: Contribution to journalJournal articleResearchpeer-review

    416 Downloads (Pure)


    A novel measurement system provides determination of pump induced phase shifts in erbium doped fibers with an accuracy of ~π/20. Using this system, a systematical analysis of the pump induced modulation of the refractive index and dispersions for a signal at 1550 nm and a pump at 980 nm is reported. The analysis contains measurements of pump induced refractive index changes as function of wavelength, pump power, and doping concentration. A model taking account of the contribution to the refractive index changes from optical transitions between 4 I15/2 states and 4I13/2 states in Er3+ yields good agreement to experimental results apart from a wavelength independent offset. The offset is interpreted to originate from high energetic optical transitions. The results show that for a large refractive index modulation, a short and highly doped fiber should be used with limited amplified spontaneous emission effect. In optical communication systems comprising erbium doped fiber amplifiers, a tradeoff between dispersion and amplification must be made
    Original languageEnglish
    JournalJournal of Lightwave Technology
    Issue number5
    Pages (from-to)732-738
    Publication statusPublished - 1996

    Bibliographical note

    Copyright: 1996 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE


    Dive into the research topics of 'Pump-induced refractive index modulation and dispersions in Er3+-doped fibers'. Together they form a unique fingerprint.

    Cite this