Learning Forum

[Pengsheng Zhang]

Hi,

Greetings. I would like to ask about the problem of transmission acquirement of two single-wavelength sources input.

I set a 1.5um-source and a 1.7-um source in two different waveguides, and set 2  'frequency domain field and power'  monitors in each waveguides to measure the output,  seeing that the transmissions obtained from the two monitors are neither single-wavelength, nor holding a value close to ''1'' , their 'T' visualizers are shown as fig.2.

Hopefully, please help me calculate the real  transmission of the two waveguides, such as using the 'P' value obtained by the monitor?

Thanks a lot ! Best ragards.

 

[Dimitris Polyzos]

Hello, 

Thank you for contacting us. 

I reckon that the transmission is less than 1 due to leaking light outside of the waveguide. What I can see from the screenshot you shared with me is that the waveguide is quite thin and I believ that the mode is not very well confined in its boundaries. You can check that from the option profile mode of transmission monitor. I would suggest to use log scale and check if the mode is well confined in waveguide's boundaries.

Also please check that both source and monitor use the glabal settings of single wavelength emission and monitoring. Check photos below:

       

I hope I helped. PLease let me know if you need further assistance.

Kind regards 

Dimitris