1 July 2001 Experimental assessment of access guide first-order mode effect on multimode interference couplers
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Optical Engineering, 40(7), (2001). doi:10.1117/1.1385338
Abstract
Experimental results on multimode interference (MMI) coupler performance, when the access waveguides are not single mode, are shown. The 3-dB MMI couplers based on restricted interference are fabricated in InP/ InGaAsP buried waveguides. Unbalanced measurements for different excitation conditions are shown. A drastically unbalanced decline of 30% is reported for an alignment deviation of 6 ?m. Less critical effects are measured when misalignment is controlled below 2 ?m. A beam propagation method and modal analysis are used to validate experimental results.
Carmen Vazquez, Candido Aramburu, Marko Galarza, Manuel Lopez-Amo, "Experimental assessment of access guide first-order mode effect on multimode interference couplers," Optical Engineering 40(7), (1 July 2001). http://dx.doi.org/10.1117/1.1385338
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KEYWORDS
Brain-machine interfaces

Waveguides

Beam propagation method

Tolerancing

Wave propagation

Optical lithography

Waveguide modes

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