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.

Pump wavelength (nm)

Pump wavelength launching the cascade.

Stokes order

Stokes order n = 1, 2, … (each step adds one 440 cm^-1 shift).

Compute silica-fiber Raman Stokes wavelengths from a pump wavelength and integer cascade order using the 440 cm^-1 shift. 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]

Stokes wavelength (nm)

Wavelength of the selected Stokes order.

Shift per order (cm^-1)

Raman shift applied per order.

• 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.

• FBG Strain-Temperature Shift

  Compute fiber Bragg grating wavelength shift from axial strain and temperature change using the silica photoelastic and thermo-optic coefficients.

• CO2 Line Selection Table

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

• 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.