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Journal article

Influence of higher order modes on angled-facet amplifiers

By Wang, Z.1; Mikkelsen, B.1; Stubkjær, Kristian2

From

Technical University of Denmark1

Department of Photonics Engineering, Technical University of Denmark2

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

Language: English
Publisher: IEEE
Year: 1991
Pages: 366-368
ISSN: 19410174 and 10411135
Types: Journal article
DOI: 10.1109/68.82114
Keywords

Coatings Electromagnetic waveguides Gain Optical coupling Planar waveguides Polarization Reflectivity Refractive index Waveguide junctions Wavelength measurement

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