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.

Mode

Use explicit coating values or an uncoated GaAs facet.

R_rear (%)

HR-coated rear facet reflectivity.

R_front (%)

AR-coated front facet reflectivity.

n

Refractive index for the uncoated GaAs cleave.

Split the internal laser power between the two facets from their reflectivities, either coated or a bare cleaved GaAs facet. 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]

R_front used (%)

Reflectivity used at the front facet.

R_rear used (%)

Reflectivity used at the rear facet.

Front share (%)

Share of internal power exiting the front facet.

Rear share (%)

Share of internal power exiting the rear facet.

• 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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