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.

Autocorr width (fs)

Measured intensity autocorrelation FWHM.

Pulse shape

Assumed pulse envelope shape.

Convert intensity-autocorrelator width to pulse duration with the Gaussian or sech² deconvolution factor. 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]

Pulse width (fs)

Deconvolved pulse FWHM.

Factor

Deconvolution factor applied.

• 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.

• Time–Bandwidth Product Checker

  Compare an ultrafast pulse with the Gaussian or sech² transform limit using the narrow-band conversion Δν ≈ cΔλ/λ² and an explicit tolerance.

• CPA Stretch Ratio

  Compute the chirped-pulse amplification stretch factor from stretched and compressed pulse durations.

• Fiber NA to Mode-Field Diameter Converter

  Convert step-index fiber core/cladding indices, core radius, and wavelength into numerical aperture, V-number, and Marcuse mode-field diameter.