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.

CW mode radius (µm)

Calculated intracrystal CW mode radius.

Mode-locked radius (µm)

Calculated intracrystal mode-locked mode radius.

Pump radius (µm)

Gaussian pump-beam radius in the gain crystal.

Compare continuous-wave and mode-locked Ti:sapphire mode overlap with a Gaussian pump as a soft-aperture screening check, without claiming full cavity stability. 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]

CW overlap

Normalized CW-mode overlap with the Gaussian pump.

Mode-locked overlap

Normalized mode-locked overlap with the Gaussian pump.

Overlap gain (%)

Relative overlap increase from CW to mode-locked mode.

Favors mode locking

Whether the supplied mode radii increase pump overlap.

Model limits

Important limits of the simplified overlap model.

• 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.

• Ti:Sapphire KLM Prerequisite Check

  Check whether the intracavity peak power clears the Kerr self-focusing critical power that Ti:sapphire KLM mode locking requires.

• ECDL Littrow/Littman Config Selector

  Compare Littrow and Littman external-cavity diode laser configurations and return their beam-stability, linewidth, and cavity-length characteristics.

• HeNe Cavity Length Design

  Compare a He-Ne 632.8 nm optical cavity's c/(2L) axial-mode spacing with an explicit gain-bandwidth assumption; this does not guarantee mode-hop-free operation.