Use this laser calculation or lookup for a first-pass optics, pulse, beam, gain-medium, diode, fiber, or safety comparison under explicitly stated wavelength and operating conditions.

Currents (mA)

Ascending drive currents of the L-I sweep.

Powers (mW)

Matched optical power readings.

Kink tolerance (%)

Relative slope change between adjacent segments that counts as a kink.

Fit the linear section of a diode L-I curve to extract the threshold current and slope efficiency, and flag kinks from abnormal slope changes. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

I_th (mA)

Linear extrapolation of the lasing line to zero power.

Slope efficiency (mW/mA)

Above-threshold slope efficiency.

Max slope change (%)

Largest symmetric percent difference between adjacent lasing-segment slopes (0–200%).

Kink detected

True when the largest slope change exceeds the tolerance.

• Laser behavior depends on wavelength, mode, coherence, pulse shape, beam quality, cavity and optical losses, material data, temperature, alignment, nonlinear effects, damage thresholds, and measurement definitions. Lookup values are not substitutes for current device data or laser-safety analysis.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Verify constants and limits with primary literature and manufacturer data, propagate tolerances, model the complete optical train, and apply the relevant laser safety standard.

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