Circulator

[Ranjeet KumarParticipant]

Hi everyone,
Can anyone explain the physical significance of Circulator and its different parameters. how could i chose its parameters value for optimum results in OFDM PON. WHAT IS noise threshold. What is its contemporary components in optisystem. How to set its operating wavelength in design whether it will be same as wavelength of 1st transreceiver.
Please explain in details.

[ZULKARNAINParticipant]

Hi ranjeet…
Well i think i can’t explain all the things you asked,but i will try to give idea of some terms you asked.
An optical circulator is a special fiber-optic component that can be used to separate optical signals that travel in opposite directions in an optical fiber, analogous to the operation of an electronic circulator. So circulators can be used to achieve bi-directional transmission over a single fiber.
For your reference i am attaching few links which might be helpful to you.
1.https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwi_9Oy9z7PLAhWP1I4KHQZRDvkQFggbMAA&url=http%3A%2F%2Foptiwave.com%2Fforums%2Ftopic%2Fcirculator%2F&usg=AFQjCNFi4JYI3b_o_KcaUjQ3-YIeiPwsUg&sig2=22_D_2-7YKL7Kw8MubQABg

2.http://optiwave.com/forums/topic/practical-noise-in-lasers/

[umer syedParticipant]

hi ranjeet,

the optical circulator works as as that of circulATOR IN THE MICROWAVE,AND IS used to separate optical signals that travel in opposite directions in an optical fiber.(ESPECIALLY IN BIDIRECTIONAL FIBER SYSTEM).

WITH REGARDS

[aasif bashir darParticipant]

hi ranjeet,
i am am attaching few links, hope they may help
http://www.fiber-optic-equipment.com/the-working-principle-of-the-optical-circulator.html
https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwizq4jU7LPLAhUNCo4KHWRrCo0QFggiMAE&url=http%3A%2F%2Fwww.fiber-optic-tutorial.com%2Fpassive-optical-components-optical-circulator.html&usg=AFQjCNFER7VUWJt4uwMoSpN3x5vLn388Ag&sig2=OwOSGMmj0RNoqx6fcn-RwQ&bvm=bv.116573086,d.c2E
https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwizq4jU7LPLAhUNCo4KHWRrCo0QFggbMAA&url=http%3A%2F%2Fwww.fs.com%2Foptical-circulator-tutorial-aid-455.html&usg=AFQjCNFenMrBP6L8lKPKFN1jJ6reqoXy7w&sig2=aCl8yqZey2fl94jobYiq1w&bvm=bv.116573086,d.c2E

with regards

[Aabid BabaParticipant]

Hello ranjeet,
Can you please explain what is the exact problem with your circulator ??
i Know its somewhere related to the downstream and upstream scenario… I guess you are getting null output at the circulator output after feeding a signal at the input…is it so??

Regards

[Ranjeet KumarParticipant]

Hi Aabid sir,
I have problem in designing bi-directional OFDM PON , Here i am uploading unidirectional OFDM PON , please suggest or if possible make some necessary changes in it. i want to design it like WDMPON.

Attachments:

1. OFDM-PON5.osd

+1

[aasif bashir darParticipant]

hi ranjeet ,
if you are using bidirectional fiber link, then you have to use delay element and seep iteration and index value..

with regards

[aasif bashir darParticipant]

here is the link:

Lesson 7: Optical Amplifiers — Designing Optical Fiber Amplifiers and Fiber Lasers

this link will help you in regard of using the delay elements with optical circulator for birectional fiber link.

with regards

[Aabid BabaParticipant]

Hello asif,
The link you posted can be really helpful for him if he wishes to implement his system this way. I am not able to open his osd file. However, i have attached an pdf file for further reference. Hope he gets his problem solved.
regards

+2

[Aabid BabaParticipant]

hello ranjeet,
I initially came across the same problem and it is actually about the bidirectionality . What i would suggest you here is going through lesson 5 of the optiwave tutorial where they have mentioned about parameters about signal index and layout iteration parameter. All you need to do is go through lesson 5 and i hope it will be very helpful because i got every confusion cleared.
Please find the attachment herewith.

regards

Attachments:

1. OptiSystem_Introductory_Tutorials1.pdf

+2

[aasif bashir darParticipant]

hi ranjet,
the .osd file is still not opening(same problem as i mentioned above)

[TanveerParticipant]

hi ranjeet…
you can refer the below link for Bidirectional WDM-PON system

https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0ahUKEwjXgaP4grbLAhUMVI4KHcalCRYQFgg6MAQ&url=http%3A%2F%2Fpnrsolution.org%2FDatacenter%2FVol3%2FIssue2%2F105.pdf&usg=AFQjCNG2s7FFxwT31AyqPZ1tUCQySBxP0w&sig2=8qdxa-sptf7vkm70tZ8QmQ

with regards

+2

[FAYIQA NAQSHBANDISpectator]

Hi ranjeet,
Optical circulator minimizes the loss of light. An optical circulator is a device used in optical communications systems, which can be used to separate optical signals that travel in opposite directions in an optical fiber, analogous to the operation of an electronic circulator.
Circulator is most widely used for bidirectional networks. If you check the library it is present in the passive component library and you will 3 types of circulators present there.
Thanks and regards

+7

[FadyParticipant]

Hi Ranjeet,
Why you are using OFDM OS12 components in your work. You should use the new OFDM components to get better BER results.

[Ranjeet KumarParticipant]

Hi AAsif sir,
Here i am uploading unidirectional OFDM PON of 4 user. Please help me to design this osd file to Birectinal one.
seeking for your quick response.

Attachments:

1. OFDM-PON7.osd

[Ranjeet KumarParticipant]

Thanks Aabis sir,
For making things clear and helping me. I have read it.

[Aabid BabaParticipant]

you are welcome ranjeet.
Cheers!