Determination of single-mode fiber coupler design parameters from loss measurements

A method is presented for determining the minimum spacing between the fiber core centers in a single-mode fiber coupler which consists of two substrate blocks each provided with a fiber fixed in a curved groove. Immersion liquids with known refractive indices are placed on the top surface of one cou...

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Veröffentlicht in:	Journal of lightwave technology 1985-01, Vol.3 (4), p.864-867
Hauptverfasser:	Leminger, O., Zengerle, R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Circuit properties Curve fitting Electric, optical and optoelectronic circuits Electronics Exact sciences and technology Integrated optics. Optical fibers and wave guides Liquids Loss measurement Optical and optoelectronic circuits Optical fiber couplers Optical fiber theory Optical refraction Optical surface waves Power measurement Refractive index Surface fitting
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Beschreibung
Zusammenfassung:	A method is presented for determining the minimum spacing between the fiber core centers in a single-mode fiber coupler which consists of two substrate blocks each provided with a fiber fixed in a curved groove. Immersion liquids with known refractive indices are placed on the top surface of one coupler block and the introduced power loss of the light guided within the fiber is measured. By fitting these results to calculated curves the minimum spacing may be determined with an error of less than 0.2 μm.
ISSN:	0733-8724 1558-2213
DOI:	10.1109/JLT.1985.1074259