Influence of higher order modes on angled-facet amplifiers

Z. Wang, B. Mikkelsen, Kristian Stubkjær

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Abstract

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
Volume3
Issue number4
Pages (from-to)366-368
ISSN1041-1135
DOIs
Publication statusPublished - 1991

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