- This topic has 8 replies, 3 voices, and was last updated 10 years, 5 months ago by .
Viewing 7 reply threads
Viewing 7 reply threads
- You must be logged in to reply to this topic.
Optiwave software can be used in different industries and applications, including Fiber Optic Communication, Sensing, Pharma/Bio, Military & Satcom, Test & Measurement, Fundamental Research, Solar Panels, Components / Devices, etc..
Download our 30-day Free Evaluations, lab assignments, and other freeware here.Â
Optiwave software can be used in different industries and applications, including Fiber Optic Communication, Sensing, Pharma/Bio, Military & Satcom, Test & Measurement, Fundamental Research, Solar Panels, Components / Devices, etc..
Download our 30-day Free Evaluations, lab assignments, and other freeware here.Â
dear all,
after 50km optical transmission, how to keep constellation map as possible clear?
For example, 4APSK signals generated by modulator. I can see it by Constellation visualizer. Mr.Damian knows it.
I added 50km fibers and filters. but result is so bad. I tried as 1km fiber, but signal rotated almost -45 degree.
what parameter should be consider in case of 50km? or 80. How to keep clear signal?
if you have some idea, pls kindly share
Did you match the reference signal wavelength in the fiber with transmitter and receiver wavelength?
yes, reference wavelength is 1550nm at TX, RX and fiber and filters. same
I remember I had this problem with 100G DP-QPSK but revision 13 solved it. Are you using 13 or 12?
I’m using revision 13. do you remember which parameters set? and how about components ? amplifier, filter.. is that enough?
when I deselect “group velocity dispersion” and “third-order dispersion”, constellation map showed almost clear. just attenuated.
do you have idea about to correct the dispersion? need other components?
Yes, I exactly need Dispersion compensating fiber. DCF. In optisystem, i didn’t find it.
if you know it, please share me
Hi Boldoo,
You can use a regular optical fiber component but manually change the dispersion. As in the attached project.
thank you dears but it can’t change phase shift. I posted another forum, please review it.
thanks