Looking for some multisim functions - Newbie

[CalebC]

Hi, i have a laser rate equation simulation setup. I tuses a pulsed voltage source

I have to do the following...

Use a pulsed voltage source that is large enough to observe lasing to get the simulation
going and print plots of the input plus the carrier and photon densities to demonstrate that
your implementation is functioning correctly.

(g) Set the pulse source to produce a pulse that has a zero level that is negligible and a one level above
threshold. Observe the turn on delay before there is significant photon output and produce a printout
to show the value of the delay, which should be the similar to that calculated in part (c). Increase the
zero level to 9 mA and again obtain the turn on delay.

(h) Replace the pulse input with a triangular wave that sweeps from zero to some value substantially
above threshold. Run the simulation and export the data to excel. Plot a graph of the input current
against the photon output to show that the threshold is indeed 10 mA.

(i) Using an ac voltage source set to 20 mA, perform an AC sweep over a range that includes the
resonant frequency of the laser. Print out the graph and obtain the position of the resonance (which
should tie up with your calculation in (d)).

I cnat for the life of my find any multisim functions for finding out about carrier and photon densities, or observe any turn on delay  in my pulse source ect. Could someone tell me where I can do this oin multisim, is it even possible?

Thanks

[Tom O]

Hi CalebC,

Using the PULSE_VOLTAGE component (Sources»Signal Voltage Sources), you can generate a pulsed source as you describe. The three attributes that sound of interest to you are:

Initial value: This is the "zero level" as mentioned in your question
Pulsed value: This is the "one level"
Delay Time: This is the turn-on delay.

The rest of your queries, such as those regarding photon density, sound contextual to your problem rather than a function that Multisim performs, I can't really help you there!

I hope this helps, good luck!