Search Results for 'wdm'

[Ahmad AtiehModerator]

I’ve noticed that you are using positive dispersion instead of negative dispersion that is needed to allow compensation. Also, I’ve noticed that the bandwidth of FBG is much smaller than the DWDM channels. You need to make sure that the FBG bandwidth contains the DWDM channels.

regards,
Ahmad

[Ahmad AtiehModerator]

Hello Nghia,
You may use the “ideal Dispersion Compensation FBG” component in OptiSystem after or before the fiber depending on your design to compensate the DWDM signal. You need to make sure that the “Bandwidth” parameter of the FBG includes all DWDM channels. After the compensation you place the DEMUX to separate the DWDM channels and detect each separately.
There is an example on post compensation in OptiSystem example library at
C:\Users\xxxxxxxx\Documents\OptiSystem 15.2 Samples\Dispersion compensation\

Regards,
Ahmad

[Nghia Nguyen]

I’m doing with WDM system and I need to make dispersion compensation using FBG on fiber before signal go into DEMUX. But I dont know how to work with Ideal Dispersion Compensation FBG. Anyone could give me some recommendation. Thanks for helping me!

[mehdi taherpoor]

Hello
I want to design temperature sensors, strain, and pressure in optisystem software.

Someone can give me the circuits for these sensors in optisystem.??

Also, I want to connect several FBGs by train, if anyone can explain WDM, TDM, etc. methods and explain how to use it in OPTISYSTEM software.??

What is the difference between using multiplexer and combiner??

[Ahmad AtiehModerator]

Hello Nghia,
you may try the example “WDM PON.osd” in OptiSystem example library. You can change the fiber parameters to any nonlinear effect you require to investigate.

You may communicate with me at ahmad.atieh@optiwave.com if you need any other information.

Regards,

Ahmad

[Nghia Nguyen]

Hi everyone, Im designing a WDM-PON system to rating non-linear effect. Can anyone give me some example simulation of this system?

[MaddyParticipant]

Hi,

You better to use MZM instead “sine generator and Electrical multiplier”. Because you are using DWDM PON, i hope it will work.

[Maddy]

Hello Everyone,

I would like to design an OTDR (Optical Time Domain Reflectometer) system for fault finding and localization purpose in TWDM-PON system.Here, i have to measure ReyLeigh back scatter signal.

I have found some similar design in Optisystem forum, But could not give any output at PIN/APD. Does anyone knows how to Overcome it?

Thanks
Maddy

[Husam Abduldaem MohammedParticipant]

Dear Hashemi
You can simulate a 400G or 1T system in Optisystem. For example, you can use multiplexing techniques like WDM or use different modulation schemes to achieve such high bit rates.

[ayushi vishwakarma]

can anybody know how to combine cwdm and dwdm together?

[Jayeshkumar Prajapati]

sir, i have simulated ROF WDM 8 channel OFDM system for approximate 3000 km. is it ok ? is that much distance is realistic for ROF applications?

[gaganpreet Kaur]

Hi,
i want to simulate my wdm system in matlab using numerical simulation method and then model that in optisytem. But i don’t know how does optisystem calculate the step size used for its SMF. It is variable but how is it calculated.
Also i need to simulate HNLF as well .Willthe same step size be applicable ?
Pls its urgent… kindly help optiwave team.

[Mohamed A. A. AbouseifParticipant]

Hi Anoop,
you can generate multi signals (equivalent to MI) and combine all together then modulate them on fiber. in Rx these signals could be de-combined by WDM, or divider (equivalent to MO).
Hope that is help,
thanks
Mohamed Abouseif

[Mohamed A. A. AbouseifParticipant]

Hi Gayathri,
FBG is acting as a filter effect w.r.t. frequency domain. so usually ur required to enter Optical frequency of the center of the Fiber Bragg Grating reflection spectrum. Try to set it in the center of the WDM system and check the results.

Hope that helps,
thanks
Mohamed Abouseif

[GAYATHRI P V]

Sir, I have used fbg as a compensator in wdm system with four channels 193.1-193.4. I placed fbg in the fiber span with reference wavelength of fbg as 193.1Thz. Does the gratings reject other wavelengths (such as 193.2,193.3,193.4 ).???. I’m getting same quality factor and Ber for all the channels . I tried placing each fbg at each receiver of each channels? ( but not getting good response). What does actually placing fbg of 193.1Thz in fiber span mean???