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| Full Name | Ahmad Atieh |
| Organization | Optiwave Systems Inc. |
| Job Title | VP-Optical Systems |
| Country |
Forum Replies Created
Dear Jaafar,
There is no reason to use bit instead of second. The unit bit is directly related to the bit duration set in the project main layout through the bit rate. FYI, there is another unit called unit interval (UI), which is also used in the literature and by the industry.
Regards,
Ahmad
Hello,
As you notice in the attached file, the Dual Port MZ Modulator Measured has insertion loss parameter. However, the the absorption phase versus applied voltage data is a measured data and it is modulator specific per vendor. I recommend you get the specification from vendors’ datasheets.
please email me at ahmad.atieh@optiwave.com to discuss further.
Regards,
Ahmad
Dear Shruti,
Which dual drive MZM you refer to? There are few dual drive MZM modulators in OptiSystem.
If the one with Modulator Measured, then there is an explicit insertion loss term in the component properties and bias setting voltages. Else, if it the absorption phase type, then the loss is built-in the absorption phase measured data.
Regards,
Ahmad
Dear Aseel,
we have developed two new Underwater channel components that are available to some customers. They will be generally available in OptiSystem 21 next release.
Let me know if you have valid maintenance and support license and I’ll arrange a version for you temporary.
Regards,
Ahmad
Dear Sun,
Typically, delayed interferometers are used in DPSK. I am not sure if the MZDI would work for QPSK. However, my guess the operation depends on the applied delay in both arms of the coherent detectors if it would work. You may email me your project as zip file to check it. My email is ahmad.atieh@optiwave.com.
Regards,
Ahmad
Dear Nur,
you need to check if the simulation frequency window is larger than the used signals. You may increase the window by increasing the number of samples per bit.
If the issue persists, please email me your project as zip file and let me know the version of OptiSystem that you use. My email is ahmad.atieh@optiwave.com.
Regards,
Ahmad
Dear Krishna,
you use OSNR(input)-OSNR(output) only when the noise source is external, which doesn’t apply here. The noise is coming from the doped fibers. So, you need to use the formula as described in the image I’ve sent you earlier.
regards,
Ahmad
Dear Akshata,
could you please let me know by email your institution name and if you have maintenance and support license for OptiSystem? I need to set up the priority/timeline on your enquiry.
My email is ahmad.atieh@optiwave.com
Regards,
Ahmad
Dear Hu,
you need to set properly the applied voltages to the modulators to suppress the carrier as shown in the attached image. Please refer to the example (ROF_carrier suppression.osd) in OptiSystem Example library for guidance.
Regards,
Ahmad
Dear Adramance,
OptiSystem has over 580 components that can be used to design your project. please refer to the examples in OptiSystem Example library for guidance.
I recommend to get some published articles on your topic and try to build them in OptiSystem.
Regards,
Ahmad
Dear Krishna,
You could find the equations for NF calculation in the datasheet of the Dual port WDM Analyzer as shown in the attached file.
regards,
Ahmad
Dear Akshata,
please note that you need an in-phase and quadrature signals to display a constellation on the constellation diagram visualizer. Please refer to the examples in OptiSystem Example Library located at the following location to get guidance on how to use the visualizer.
C:UsersUSER NAMEDocumentsOptiSystem 20.0 SamplesAdvanced modulation systemsPSK systems
Regards,
Ahmad
Dear Carlos,
We offer the passwords for professor who acquire OptiSystem license.
Regards,
Ahmad
Dear Akshata,
the files can be found at
C:UsersUSER NAMEDocumentsOptiSystem 20.0 SamplesFiber analysis and designSMF-28 optical fiber data files
and
C:UsersUSER NAMEDocumentsOptiSystem 20.0 SamplesOptical amplifiersRaman amplifiers
Regards,
Ahmad
Dear Getnet,
Typically, the backbone of the RRH is fiber. All necessary components are available in OptiSystem. Regarding the antennas, you may use one of the multi-port (1, 2, 3, or 4) S Parameters components for that.
Optiwave will offer a new mm Wave antenna components in the near future.
Regards,
Ahmad