Synchronization of Santec Tunable Laser and DAQ Card (NI USB-6212)

[Rick_UF]

Hi,

I am currently involved in a project to build connection between a tunable laser (TSL-550) and DAQ card (USB-6212) in LabView. The physical circuit in terms of hardware connection is pretty simple: laser --> photodetector --> DAQ card. The data I need is the optical power read by the DAQ card while sweeping the laser wavelength. I already made a simple LabView program (seen picture below) to control the laser sweeping where I can set the step of this sweep. Now, I want, once the laser wavelength increases by one step, it stops for one second and DAQ card records one data point which corresponds to the power at a specific wavelength. After that, the laser wavelength continues to move up by another step, and DAQ stores another data point. However, the laser has "VISA session", and I don't know about how I can introduce its information to DAQ card. 

I am new to the LabView, and was wondering if anyone has done similar projects before. Any suggestions or comments are highly appreciated! Thank you!

Yuncong