Frequently Asked Questions

Alfa Chemistry provides comprehensive optical properties analysis and testing services for fibers, including optical parameter analysis and structural parameter analysis.

The important optical performance parameters include refractive index, attenuation, cut-off wavelength, dispersion and dispersion coefficient, loss coefficient, and nonlinear coefficient.

Methods include the direct far-field scanning method, far-field variable aperture method, near-field scanning method, and the transmission power method for measuring the cut-off wavelength of single-mode fibers.

Structural parameters include core diameter (module diameter), core, and cladding refractive index or distribution on profile.

The technologies used include the refractive near-field method, transverse interference method, and near-field light distribution method.

Alfa Chemistry has an experienced testing and research team, offers efficient and cost-effective services, and has complete and advanced infrastructure.

Generally, the larger the core diameter, the more modes there are, and the larger the cut-off wavelength.

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