Femtolab FROG code

Basic code for running FROG (Frequency Resolved Optical Gating) measurements & reconstruction.

Assumes: - Ocean Optics spectrometer - Newport ESP series delay stage, serial connection (USB>serial adaptor also OK)

Prerequisites: - pySeabreeze for spectrometer comms, https://github.com/ap--/python-seabreeze - newportESP for serial comms with ESP300/301 controller, https://pypi.org/project/NewportESP/ - frog analysis routines from froglib, https://github.com/xmhk/froglib

Structure: - /frog defines a frog class, this provides an object to handle data & DAQ tasks. - /spec provides interfaces to spectrometers: currently supports Ocean Optics only. - /stage provides interfaces to stages: currently supports Newport ESP series. - frogDemo.py provides use examples, including required local settings for comms.

To do: - Finish restructuring & testing current version. - Add interface layer for handling other hardware types. - Finish python packaging (inc. dependencies).

Known issues/bugs: - newportESP module encoding may give errors (likely a python version and/or pyserial version change - tested with newportESP v1.0, python v3.6.6, pyserial v3.4)

  Note: adding .encode() or .decode() to the function call will convert to bytestring, as required.

  Lines to change in newportESP:
      122 - main serial write statement: add ".encode()" to serial write.
      
      286 - status read, changed comparison value to bytes: add ".decode()" to serial read.

- Pickle save function currently limited to raw data (t, spectrum) only.
- Reconstruction with froglib implements SHG or blind (default) reconstruction, see  https://github.com/xmhk/froglib for further details.

This code: Paul Hockett

http://femtolab.ca

https://github.com/phockett/frogDAQ

Released under GNU GPL v3.

Sample FROG scan for broadband UV pulse

.. image:: https://github.com/phockett/frogDAQ/blob/master/frogDAQ/demo/2018-10-31_15-29-54_frog_UV_50_20_15.5_comp.png

See demo directory for more.