# Description

The A·P·E Calculator helps to easily evaluate often needed (non)linear equations. This includes Sum Frequency Generation (SFG), Difference Frequency Generation (DFG), the wavelength relations in an optical parametric oscillator (OPO) as well as in coherent anti-Stokes Raman scattering (CARS) spectroscopy.

The conversion between wavelength, wavenumber, and frequency as well as different characterizations of pulses can be calculated.

Feedback as well as feature requests are appreciated.

Keywords: nonlinear optics, ultrafast optics, wavelength, wavenumber, SFM, OPO, DFG, CARS, frequency, bandwidth, peak, average, power, energy, density, conversion, pulse width, laser, physics, dispersion, light, ape, berlin, autocorrelator, spectrometer, spectroscopy, spectrometry, microscopy, sgh, thg, fhg, mode locker, frequency shifter, acousto-optical modulator, delay

The conversion between wavelength, wavenumber, and frequency as well as different characterizations of pulses can be calculated.

Feedback as well as feature requests are appreciated.

Keywords: nonlinear optics, ultrafast optics, wavelength, wavenumber, SFM, OPO, DFG, CARS, frequency, bandwidth, peak, average, power, energy, density, conversion, pulse width, laser, physics, dispersion, light, ape, berlin, autocorrelator, spectrometer, spectroscopy, spectrometry, microscopy, sgh, thg, fhg, mode locker, frequency shifter, acousto-optical modulator, delay

# Reviews

# What's New

- direct calculation of the DFG wavelength from signal and idler is now possible (OPO)

- direct calculation of signal and idler from DFG and pump wavelength is now possible (OPO)

- direct conversion of wavelength, frequency and wavenumer is now possible (bandwidth calculation)

- photon energy was added to the wavelength, frequency and wavenumer conversion

- input and output error checking was improved (OPO)

- bugfix: power, energy, densities calculation

- bugfix: link to APE America