Influence of higher order modes on angled-facet amplifiers

Z. Wang, B. Mikkelsen, Kristian Stubkjær

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    The influence of the first-order mode on the residual reflectivity of angled-facet amplifiers is analyzed. For a 7 degrees angled-facet ridge waveguide amplifier with a single-layer antireflective (AR) coating, a gain ripple lower than 1-dB at 25-dB gain can be obtained independent of the polarization, even in the presence of a first-order mode with a 15-dB gain. The tolerances for the thickness and refractive index of the AR coating are reduced by a factor of three compared to operation in the fundamental mode only. The influence of the higher order mode can virtually be suppressed by increasing the facet angles to 10 degrees
    Original languageEnglish
    JournalI E E E Photonics Technology Letters
    Issue number4
    Pages (from-to)366-368
    Publication statusPublished - 1991

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    Copyright: 1991 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


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