From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.

We appreciate your patience as we improve our online experience.

LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

vi for laser diode control

I want to control the laser wavelength (laser diode) by varying current and temperature through labview. I am using NI DAQ - PCI 6251. And then obtain the data in graphical form. 

0 Kudos
Message 1 of 6
(2,498 Views)

Good for you.

 

Did you have a specific question?

----------------------------------------------------------------------------------------------------------------------------
"If anyone needs me, I'll be in the Angry Dome!"


0 Kudos
Message 2 of 6
(2,493 Views)

Can you provide a basic layout??

 

0 Kudos
Message 3 of 6
(2,477 Views)

@bsunny wrote:

Can you provide a basic layout??

 


And do your work for you?  Really???

 

0 Kudos
Message 4 of 6
(2,470 Views)

Basic layout for what?  You haven't provided any information about how you're going to stimulate the diode or what you want to measure (and how). 

 

The 6251 can only output voltage so...

How will you change the current level?

How will you change temperature?

What device will you measure the diode frequency output with?

LabVIEW Pro Dev & Measurement Studio Pro (VS Pro) 2019 - Unfortunately now moving back to C#, .NET, Python due to forced change to subscription model by NI. 8^{
0 Kudos
Message 5 of 6
(2,469 Views)

Laser diodes can be quite sensitive to changes in temperature and current.  Setting values outside a rather narrow range may result in destruction of the diode.  Unless your diodes are very cheap and you have a lot of them, I recommend that you build some high performance control circuits with hardwired limits to protect your diodes and then allow the software to control the current and temperature within those limit through the control circuits.

 

Lynn

0 Kudos
Message 6 of 6
(2,449 Views)