How to use SHG_WGD element in INTERCONNECT ?

- November 12, 2024 at 3:04 pm
  
  202321050318
  Subscriber
  
  I have noticed SHG_WGD element updated in INTERCONNECT, but I find the user guide for this element is too brief for me to understand. For example, I made a simple circuit by CWL, SHG_WGD, and OSA, but no second harmonic generation was found when I see the result in OSA. Can someone help me see what's going wrong here? Your insights and suggestions will greatly help me. Thanks!
- November 15, 2024 at 10:50 pm
  
  Kyle
  Ansys Employee
  
  The SHG waveguide should work with just a CWL and an OSA. The second harmonic power may be lower than the “sensitivity” property of the OSA. Try reducing the “sensitivity” property of the OSA to see if the second harmonic appears. If you change the units from dBm to W you can set the sensitivity to zero.
  - November 20, 2024 at 12:49 pm
    
    202321050318
    Subscriber
    
    Thank you for answering. Ive tried to lower the sensitivity to -200dBm and to 0W, but still no SH found in OSA. However, the power of FH is reduced by 2dB after SHG_WGD, so I think there should be some SHG. What else can be wrong in this model?
- November 26, 2024 at 1:28 am
  
  Kyle
  Ansys Employee
  
  What are the properties for the SHG WGD element? I checked this using the default properties for the CWL and SHG WGD elements and I am able to see the SH in the OSA results after reducing the OSA sensitivity to 0 W:
  - April 27, 2025 at 4:21 am
    
    d.kelly.2
    Subscriber
    
    I also can't seem to be able to get the element to output any signal. I've connected the default CWL like you said, set the OSA sensitivity to 0W, but the simulation only outputs an empty result. I've tried increasing input power from 0, but still to no avail. Thanks!