Ultrafast Pulse Calculator
Calculate peak power, time-bandwidth product, and dispersion broadening for ultrafast laser pulses.
Ultrafast laser pulses are characterized by three linked quantities — peak power, spectral bandwidth, and dispersion — that this calculator addresses in three independent modes. Pulse parameters mode computes peak power P_peak = E_p/(K_shape · τ), average power, duty cycle, and optional fluence from pulse energy, FWHM duration, repetition rate, and beam diameter, with shape factors for Gaussian (K = 0.9394) and sech² (K = 0.8813) profiles. Time-bandwidth mode computes the TBP = Δν · Δt, compares it to the transform-limited minimum (0.3148 for sech², 0.4413 for Gaussian), and returns the transform-limited pulse duration — useful for diagnosing chirp. Dispersion mode calculates pulse broadening from group delay dispersion GDD = β₂ · L using preset GVD values for BK7, fused silica, SF11, sapphire, and CaF₂ at 800 nm, or a custom GDD value. Results report output duration and broadening ratio.