Stretcher Grating Size Calculator

Laser Parameters Laser Parameters

Spectral FWHM Δλ_FWHM (Spectral FWHM)

used forcalculated FT limit pulse width and GDD

full spectral widthmultiplier (Full-Width Multiplier)

× FWHM

Gratingsize based on full widthcalculated: Δλ_full = multiplier × FWHM

Center Wavelength λ₀

target stretched pulse width τ_out (Target Stretched Width)

pulse shape Pulse Shape

Number of Stretching Stages

Multi-stage: Total GDD split equally per stage, L shortened by 1/N, but efficiency drops to η^N

Single-Pass Diffraction Efficiency η

Diffraction efficiency per grating pass

Grating Parameters

Line Density N

l/mm

Diffraction Order m

Substrate Thickness (Transmission Grating)

Substrate Refractive Index n (@λ₀)

Beam Parameters

Beam Diameter D₀ (1/e²)

Edge Safety Margin A

Vertical Beam Spacing (Non-Dispersion Axis)

Double-pass 4-beam symmetric layout, center-to-center spacing

Inventory Grating (Optional)

Grating Width — Dispersion Axis

Grating Height — Non-Dispersion Axis

← Enter parameters and click CALCULATE