Search Results for 'wdm'

[Ranjeet KumarParticipant]

Hi Dhiman,
Optical multiplexers are components specifically designed for wavelength division
multiplexing (WDM) systems. The demultiplexer undoes what the multiplexer has
done ; it separates a multiplicity of wavelengths in a fiber and directs them to many
fibers optical add-drop multiplexer (OADM) is a device used in wavelength-division multiplexing systems for multiplexing and routing different channels of light into or out of a single mode fiber (SMF).
A traditional OADM consists of three stages: an optical demultiplexer, an optical multiplexer, and between them a method of reconfiguring the paths between the demultiplexer, the multiplexer and a set of ports for adding and dropping signals. The demultiplexer separates wavelengths in an input fiber onto ports. The reconfiguration can be achieved by a fiber patch panel or by optical switches which direct the wavelengths to the multiplexer or to drop ports. The multiplexer multiplexes the wavelength channels that are to continue on from demultiplexer ports with those from the add ports, onto a single output fiber.

[SAHIL SINGHParticipant]

Hi Atul Sharma,

As correctly mentioned by Ranjeet,WDM Add adds a WDM channel as well as WDM signal… Also as mentioned by Naazira please upload your .osd file so that we can suggest the meaningful suggestions to improve your design…

Regards

Sahil Singh

[Ranjeet KumarParticipant]

Hi Atul Sharma,
Are you talking about WDM add component.
as we know that WDM Add Adds a WDM channel and a WDM signal.
The input signals are filtered by an optical filter and are combined in one signal. The first signal is filtered by an inverse filter.
The optical filters can be a Rectangle, Gaussian, or Bessel optical filter.
The level of crosstalk for both MUX and DEMUX components, is defined by bandwidth, ripple, and depth of the filter. These 3 factors will determine how much power, from neighboring channels, will act as crosstalk terms when calculating the performance of a specific channel. The most important parameter is depth, as it will play the most significant role in determining the power levels of the neighboring channels.
If we go through wdm subsystem we will see different signals at input gets first filtered and then combined together and then attenuated.

[Dr. Dhiman KakatiParticipant]

Hello Atul Sharma,
I am not clear (understand) about the question and the line “Now my question is if the signal that is added by the add component is self modulated or i can change the different parameters of that signal”, Where you want to change the parameters.
As far as I have understood your query, Yes you can add a optical modulated signal using the Add or Drop Multiplexer and extract also the modulated signal and then demodulate it.

WDM Add and Drop multiplexer. Equivalent to a combination subsystem based on the WDM Add and WDM Drop components.
You can refer to one sample at the WDM systems folder named COADM.

Regards,
Dhiman

[Dr. Dhiman KakatiParticipant]

Hello Urvi Pathak,

In my case the problem is with the demodulator, up to the demodulator everything is ok and as expected (Spectrum and signal power), but after the demodulator the constellation is also not coming (just few signal points are seen). I don’t thing so that there should be problem with the demodulator because without WDM everything is working fine. The problem may be at the WDM multiplexer and demultiplexer in the filter bandwidth, or at the transmitter laser frequency spacing. try changing these parameters.

Regards,
Dhiman

[Dr. Dhiman KakatiParticipant]

Hi Hermawan Widiyanto,
I want to add one more thing that if your system has a wireless part that you need to goo for MATLAB simulation otherwise the complete WDM system (irrespective of Modulation format used) can be designed completely with optisystem, For more details please go through the example that are available in ” Optisystem 14.0 samples”,

and so far as you have asked about the radio signal component, You can use the sine generator that is readily available in the defaults components library. and use it for the radio signal generation. first of all apply the bit stream generated using PRBS generator to modulate the optical signal and the resultant optical wave modultae by sine wave (analog modulation). In this way you are going to generate the required signal for the design. You are free to ask for any further query.

Regards,
Dhiman

[Atul Sharma]

Hi Everybody. Greetings!
Can you people help me. I have a question you know i am testing a signal addition in WDM add component.. I have a confusion regarding the functionality of the add component. If i am transmitting a signal from the source end ( CW Laser) which is modulated ( using particular modulation scheme) and then supply this modulated signal to the add component ( whose reference wavelength is 1553nm or 193.1 THz) , Now my question is if the signal that is added by the add component is self modulated or i can change the different parameters of that signal.
I would like to hear from you all.
Regards
Atul Sharma

[kevin xiang]

We produce the 1×2,1×3,3×3 PM coupler which are used in EDFA,OCT, hydrophone and Fiber Optic Gyro, and 3×1 RGB combiner which are widly used in laser display, fluorescence analysis and etc,
We are producing PM or SM splitter and WDM for 405nm ,532nm,635nm,650nm with visible wavelength, these kind visible light splitter and WDM are have wide application in medical, optogenetics etc.

[Nguyen Hai Ha]

Hi every one
That’s my honor to receive your helping about my problem, especially, all of you had very well knowledge about optical network system. At present, im doing my thesis about Analysis of performances of (NG-PON2) for FTTH systems: Performance on single channel transmission. I based on attached document

But they using VPI and i cant use and buy this software. Im trying work with Optisystem 7 and download some of your .osd in this topic: https://optiwave.com/forums/topic/twdm-pon/
Could you please kindly suggest me a Twdm POn osd file same my document

And how can i show this diagram by using optisystem 7

hope to receive your comment, thanks a lot your reading

[Nguyen Hai HaParticipant]

Hi everyon
im doing my master thesis and base on attached document, howerver, i still only analysis of Performance on single channel transmission. Could you guys please kindly help me make Twdm PON .osd same this below

In addition, in this document, they using VPI Photonnic, how can i make this diagram below by using optisystem 7

hope to receive your helping soon

[kevin xiangParticipant]

You can try to use our PM combiner,or PM splitter, PM WDM in your system. we produce 405nm,532nm,635nm,650nm~1650nm splitter,WDM, such as 532/635nm PMWDM etc, which are used in OCT, QPSK ,EDFA, etc.

kevin
eamail; kevin.xiang@comcore.com
skype: kevin.hsiang

[Atul SharmaParticipant]

Hi Dhiman.
I think you can help me.
I have a question you know i am testing a signal addition in WDM add component.. I have a confusion regarding the functionality of the add component. If i am transmitting a signal from the source end ( CW Laser) which is modulated ( using particular modulation scheme) and then supply this modulated signal to the add component ( whose reference wavelength is 1553nm or 193.1 THz) , Now my question is if the signal that is added by the add component is self modulated or i can change the different parameters of that signal.
I would like to hear from you.
Regards
Atul Sharma

[Atul SharmaParticipant]

Hi Alistu.

Can you help me. I have a question you know i am testing a signal addition in WDM add component.. I have a confusion regarding the functionality of the add component. If i am transmitting a signal from the source end ( CW Laser) which is modulated ( using particular modulation scheme) and then supply this modulated signal to the add component ( whose reference wavelength is 1553nm or 193.1 THz) , Now my question is if the signal that is added by the add component is self modulated or i can change the different parameters of that signal.
I would like to hear from you.
Regards
Atul Sharma

[Atul SharmaParticipant]

Hi Parikhit.

Can you help me. I have a question you know i am testing a signal addition in WDM add component.. I have a confusion regarding the functionality of the add component. If i am transmitting a signal from the source end ( CW Laser) which is modulated ( using particular modulation scheme) and then supply this modulated signal to the add component ( whose reference wavelength is 1553nm or 193.1 THz) , Now my question is if the signal that is added by the add component is self modulated or i can change the different parameters of that signal.
I would like to hear from you.
Regards
Atul Sharma

[Urvi pathakParticipant]

Hi dhiman ,
I am also getting perfect result in case of one channel with 40Gbps but when implemented in WDM it is not working. not getting problem.Thanks for trying and hopefully you find the problem with design…