Use this semiconductor calculation for first-order device, material, fabrication, interconnect, packaging, or reliability estimates when every coefficient and unit convention is known.

Linewidth (FWHM) (nm)

Required number in nm.

Resonance wavelength (nm)

Required number in nm.

The cited overview of Optical ring resonators supplies background for the terminology and domain context used by this tool.^[1]

Compute the quality factor of an optical ring resonator from its resonance wavelength and full-width half-maximum linewidth. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Quality factor

Returned number.

• Material composition, geometry, process history, temperature, electric field, bias, interfaces, parasitics, and fitted parameter ranges can invalidate a compact semiconductor model.
• Linewidth (FWHM) must be at least 5e-324.
• Resonance wavelength must be at least 5e-324.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Compare the estimate with measured process data, current device documentation, and a higher-fidelity circuit, field, thermal, quantum, or TCAD model when the decision requires it.

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  Estimate one-sided abrupt-junction avalanche breakdown voltage from the peak critical field and depletion width: Vb ≈ Ecrit·W/2. The factor 50 converts MV/cm·µm to volts and includes the triangular-field factor of one half. The estimate neglects curvature, edge termination, and the full ionization integral.

• Waveguide Loss Calculator

  Compute the total insertion loss of an optical waveguide from its attenuation per centimeter and physical length.