co2amp v.2024-12-10

Finalized support for laser transitions around 4 μm

co2amp v.2024-11-22

• Refactoring of Molecular Spectroscopy and Amplification Code
  • Transition data is now loaded from HITRAN .par files, replacing hard-coded molecular constants.
  • Sub-levels of vibrational levels coupled with laser-active levels, but not directly involved in laser transitions, are now accounted for.
  • Improved accuracy in tracking population distributions across vibrational sub-levels.
  • Added support for Oxygen-17-containing isotopologues of CO₂.
  • Increased the number of rotational levels considered, now including quantum numbers J up to 79.
  • Initiated support for 4-micron transitions (further work needed to enable non-equilibrium population distributions within a vibrational mode by adopting a thermalization time parameter).
• Enhanced Terminal Output
  • Improved Debugging Level 1 output, with more useful information and better organization of terminal messages.
• Program Name Update
  • Removed "2020" from the program name. Backward compatibility is maintained with .co2 files created by co2amp 2020.
• Documentation Update
  • Expanded and updated documentation to reflect the new changes and features.

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requires 7-zip (https://www.7-zip.org/download.html)
requires gnuplot (https://sourceforge.net/projects/gnuplot/files/gnuplot/)

co2amp 2020 v.2023-11-30

• Absolute (instead of normalized) spectral intensity in the output
• Improved data plotting
• Updated information on optical constants
• Updated documentation

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requires 7-zip (https://www.7-zip.org/download.html)
requires gnuplot (https://sourceforge.net/projects/gnuplot/files/gnuplot/)

co2amp 2020 v.2023-01-05

• more materials added
• updated documentation
• support for optical pumping at ~2 um

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requires 7-zip (https://www.7-zip.org/download.html)
requires gnuplot (https://sourceforge.net/projects/gnuplot/files/gnuplot/)

co2amp 2020 v.2021-11-04

• Fixed a bug related to material dispersion (phase index was used instead of group index in the linear part of the interaction)
• Updated documentation

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requires 7-zip (https://www.7-zip.org/download.html)
requires gnuplot (https://sourceforge.net/projects/gnuplot/files/gnuplot/)

co2amp 2020 v.2021-06-11

• Migrated to QT6 for GUI
• Bug fixes
• New materials (BaF2, ZnS) - not yet documented
• Option to use custom n2 for a material

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requires 7-zip (https://www.7-zip.org/download.html)
requires gnuplot (https://sourceforge.net/projects/gnuplot/files/gnuplot/)

co2amp 2020 v.2020-06-01

• All-new co2amp (co2amp 2020)
• C++ code
• Configuration files (YAML) based input
• HDF5 format for saving pulses
• Multiple independent amplifiers
• Multiple non-identical input pulses with arbitrary injection moments
• Arbitrary spatial- and spectral- filters
• Improved algorithms, including but not limited to:
  • frequency-domain propagation for better modelling of broad-bandwidth ultrashort pulses
  • Fresnel and Rayleigh-Sommerfeld propagation
  • frequency-domain calculation of lens focusing
  • accurate implementation of split-step algorithm for linear/nonlinear interaction with optical materials
  • better handling of pulse chirping
• New user interface (co2am+)
• Updated documentation (work in progress)
• Examples and templates
• Not compatible with older .co2 files. If you need to work with old files: 1) install co2amp 2019-04-29; 2) rename installation directory (e.g. to 'co2amp-old'); 3) install co2amp 2020.
• Gnuplot, 7-zip, and HDF5 must be installed separately (all available for free download)

co2amp v.2019-04-29

minor improvements and bugfixes

co2amp v.2018-09-12(beta2)

• New molecular constants from HITRAN2016
• Update optical pumping (increase max population number to e3=1)

co2amp v.2017-11-08

• added APODIZER component
• added AIR component
• ABSORBER renamed to ATTENUATOR
• documentation updated