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.

Wavelength (nm)

Surgical laser wavelength between the tabulated points.

Look up or interpolate the water absorption coefficient of a surgical laser wavelength and derive its optical penetration depth and thermal confinement time. 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]

α_water (cm⁻¹)

Base-e absorption coefficient of water.

Penetration depth (µm)

Optical penetration depth (1/α) in micrometres.

Thermal confinement time (s)

Time for the heated layer to cool by conduction.

Interpolated

True when log-log interpolation was required.

• 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.

• Thulium/Holmium Water Absorption Lookup

  Compare nominal 1908 nm thulium-fiber and 2090 nm holmium:YAG sources using tabulated water absorption and the corresponding 1/µa penetration estimate.

• CO2 Line Selection Table

  Look up common regular-isotope CO2 laser line wavelengths with band and isotopologue labels.

• Excimer and F2 Gas Mixture Table

  Look up an excimer or molecular-fluorine laser wavelength and photon energy, with a reminder that gas-fill life depends on the complete laser system.