TOPTICA Photonics AG - A passion for precision -


  • ToptiCalc


    Calculator for Laser Optics

    ToptiCalcTM is TOPTICA Photonics scientific calculator specially designed for use in optics laboratories. We dedicate this helpful calculator to our customers, physicists and engineers, people that work hard in order to make optics and lasers useful for science and industry. It is free and we hope it can help to make some of your calculations easier!

    You are a physicist reading a chemistry paper. Why do they always use wavenumbers instead of wavelengths...? ToptiCalcTM helps you in your everyday laboratory life by offering simple but pratical optics calculations like:

    • Spectral unit conversion
    • Calculating spot sizes for focussed Gaussian beams
    • Fabry-Perot calculations
    • Reflection and diffraction at plane glass surfaces
    • Pulse train calculations
    • Short pulse properties and chirp
    • Conversion between linear and decibel scale

    Special features of ToptiCalc™ (PC-version only):

    Mathematical expressions are entered via a simple intuitive syntaxSimply enter the calculation like you would write it down. ToptiCalcTM supports the operators + , - , * , / , ^ (power) and the predefined functions sin (x), cos (x), tan (x), arcsin (x), arccos (x), arctan (x), sqrt (x), exp (x),
    ln (x), log (x) and pi
    Dots AND commas are accepted as decimal separatorsDots AND commas are accepted as decimal separators
    A history list collects all entered expressions and the calculated resultsYou can always check whether you really entered the correct expression
    With a double click on the history list an old expression can be inserted into the current expressionYou can easily modify earlier calculations or use and combine earlier results for new calculations
    With a right-click selected parts or the complete history list can be transferred to the clipboardYou easily insert your calculations and results into any text
    Important fundamental constants are available in SI units (feature 'const SI')A convenient selection of fundamental constants saves frequent looking up in textbooks
    Spectroscopic constants are available in convenient and useful 'lab units' (feature 'const lab')Often the SI units are too awkward for real laboratory life. If you want to e.g. translate the optical path length (which you measured with your ruler in millimeters) into a temporal delay in picoseconds its much more convenient to have the speed of light directly in mm/ps.... Thus ToptiCalcTM provides some important fundamental constants in common alternative units
    Arbitrary functions and variables can be defined by the userYou can easily define your own frequently needed functions and constants, and save them to your harddisk.
    Do you often need to calculate an index of refraction of your glass for different wavelengths? Just define the relevant Sellmeier function. Or do you often need Planck's constant for translating frequencies into energies? Simply define a constant h.Pressing CTRL+X in the input line or or right-clicking in the history list provides a very easy and quick way to define a variable with the value of the current expression or any older calculation, respectively

    a desktop version

    Download a mobile version for Android

    Download a mobile version for iOS

  • Brochures
  • Software

    DLC pro Software Update


    TOPICA provides software updates for the DLC pro about twice a year. These updates provide new features and bug fixes but are not installed automatically. To update your system please follow the update instructions.

    • DLC pro Update Instructions
    • Software Update Version 1.9.0 (120 MB, 13.09.2018) PC GUI requires Windows 7 or newer - Windows XP is not supported any more.
    • New updates are announced by an email newsletter. You may subscribe by sending an email to with subject "subscribe".
    • This table summarizes the improvements TOPTICA introduced with the previous updates. The latest update includes all improvements.

    ReleaseDateNew SystemsNew FeaturesNotable Improvements and Bug Fixes
    1.908/2018DLC Holo-Litho 405Lock wizardARC (analog remote control) for TC added
    1.804/2018TopWave 266
    PDH/DLC pro
    Better protection in case of exchange of laser heads
    1.701/2018MDL pro
    2nd DL
    Configuration manager
    Python support
    CTL scan-trigger problems fixed
    User interface for power stabilization easier to use
    1.604/2017DFB pro
    PS HP
    Air pressure compensation
    TA chips up to 10 A
    Routine for setting the lock-in phase automatically
    Added display elements to ease finding in-loop signals
    1.509/2016DL-FHG pro
    TA-FHG pro
    SUV option
    Service scriptsLocking without selected lock-point enabled
    SHG and FHG system display seed power correctly
    1.403/2016Power stabilization
    FFT for all systems Labview example
    CTL: microsteps enable
    Limitations in signal routing lifted
    Scan and lock screen combined to ease operation
    Direct access of scaling mode
    1.306/2015DL-SHG pro
    TA-SHG pro
    Problem of freezing touch UI fixed
    Limits of FeedForward increased
    Correct display of TA pro power
    1.211/2014CTLImproved handling of touch UI events
    1.109/2014TA proCross talk between ARC of CC and PC modules removed
    1.002/2014DL pro


    The integration of the DLC pro into control program is supported by:

    DigiLock 110 Software

    Free software downloads of the latest DigiLock software.
    For evaluation purposes, the software can be installed and tested without a DigiLock module connected.

    To sign up for receiving notifications about new DigiLock software releases or to send bug reports or feature requests, please email to digilock [at]

    DL pro Motorization Software

    Mot / DL pro Software Version 1.15b (31.8Mb): Free download of the latest MOT / DL pro software for DL pro equipped with the motorization option. The software consists of sample VIs for computerized motor control. Some VIs have been compiled to run without a LabView installation. The software is provided "as is" as an example for integrating the motor in an experiment or setup.

    TeamViewer Support Client

  • Poster "Laser Absorption in Physics, Chemistry & Biology"

    Download a pdf file of the Poster
    Download a picture file of the Poster

  • Licenses

    OSS Licenses