Stimulated Brillouin scattering inside an optical fiber

In summary, the conversation is about the stimulated Brillouin scattering and four wave mixing processes in optical fibers. The participants discuss their research and provide resources such as professional papers and websites to help understand the topic. The main focus is on understanding the full width at half maximum (FWHM) concept and its applications in optical communications. The conversation also mentions the use of SBS and FWM in fixing phase matching in a chalcogenide chip.
  • #1
eahaidar
71
1
Hello everyone
I need some one once and for all to give me the steps to have a clear step by step idea about the stimulated Brillouin scattering inside an optical fiber please and thank you
 
Science news on Phys.org
  • #2
hi there

google came up with dozend of hits
what research have you done ?
what specifically did you not understand ?

here's just one professional paper on the subject
http://www.corning.com/docs/corporate/discovery_center/innovation_library/2004/NTRNTR100886_NIST_SOFM_Ruffin.pdf

cheers
Dave
 
  • #3
Here are two papers that may help:

Stimulated Brillouin Scattering Thresholds in Optical Fibers for Lasers Linewidth Broadened with Noise
http://arxiv.org/ftp/arxiv/papers/1211/1211.2249.pdf

Stimulated Brillouin Scattering: An Overview of Measurements, System Impairments, and Applications
http://www.corning.com/docs/corporate/discovery_center/innovation_library/2004/NTRNTR100886_NIST_SOFM_Ruffin.pdf
 
Last edited by a moderator:
  • #4
lol Bobby,
that second one of yours I had already posted SNAP :wink:

Dave
 
  • #5
davenn: Yes, If I wanted to study that subject, the "corning" paper looked like a good place to start.

Great minds think alike.

Bobbywhy
 
  • #6
davenn said:
hi there
google came up with dozend of hits

what research have you done ?

what specifically did you not understand ?
here's just one professional paper on the subject

http://www.corning.com/docs/corporate/discovery_center/innovation_library/2004/NTRNTR100886_NIST_SOFM_Ruffin.pdf
cheers

Dave
I want to know how exactly does it work in the fiber by using SBS and FWM because once I understand those I can start with my project
 
Last edited by a moderator:
  • #7
Bobbywhy said:
davenn: Yes, If I wanted to study that subject, the "corning" paper looked like a good place to start.

Great minds think alike.

Bobbywhy
Thank you my friend do u have any papers concerning FWM that would be great also thank you
 
  • #8
davenn said:
lol Bobby,

that second one of yours I had already posted SNAP :wink:
Dave
Thank you so much one more thing do you have any papers for FWM that would be awesome because I still don't have access to the uni thank yoi
 
  • #9
eahaidar said:
Thank you my friend do u have any papers concerning FWM that would be great also thank you

Eahaidar,

You have asked about “FWM”. This abbreviation might stand for “Four Wave Mixing”, or something else.

But I guess you meant “FWHM”. This abbreviation stands for “full width at half maximum” and appears in Section Two of the paper “Stimulated Brillouin Scattering: An Overview of Measurements, System Impairments, and Applications” referenced above.

If my guess is correct, you need to learn exactly what the term means, because it is commonly used in many areas of science. One place to begin is Wikipedia:

“Full width at half maximum (FWHM) is an expression of the extent of a function, given by the difference between the two extreme values of the independent variable at which the dependent variable is equal to half of its maximum value.
FWHM is applied to such phenomena as the duration of pulse waveforms and the spectral width of sources used for optical communications...”
http://en.wikipedia.org/wiki/Full_width_at_half_maximum

These two sites also explain “FWHM”:
http://www.noao.edu/wiyn/images/fwhm.html
http://ned.ipac.caltech.edu/level5/Leo/Stats2_3.html


Finally, here’s another paper that gives an excellent overview of your topic:

"NONLINEAR SCATTERING EFFECTS IN OPTICAL FIBERS
S. P. Singh, R. Gangwar, and N. Singh
Department of Electronics and Communication
University of Allahabad
Allahabad-211002, India
Abstract—The nonlinear scattering effects in optical fiber occur due
to inelastic-scattering of a photon to a lower energy photon. This
paper describes stimulated Brillouin scattering and stimulated Raman
scattering processes. Their thresholds, reduction in power penalty and
applications along with comparative study of these effects are also
presented."
http://jpier.org/PIER/pier74/23.07051102.Singh.GS.pdf

Cheers, Bobbywhy
 
  • #10
Hey bobby
Thank you for the reply
I am asking about four wave mixing and the reason that I will work on fixing the phase matching of FWM using gain of SBS inside a chalcogenide chip that so if you have papers about then that would be great anything would help thank you again
 

What is Stimulated Brillouin Scattering (SBS)?

Stimulated Brillouin Scattering (SBS) is a nonlinear optical phenomenon that occurs when light travels through a medium, such as an optical fiber, and interacts with the density fluctuations in the material. This results in the generation of a new optical wave that has a slightly different frequency and propagates in the opposite direction to the incident wave.

How does SBS occur inside an optical fiber?

SBS inside an optical fiber occurs when the intensity of the incident light exceeds a certain threshold, causing the density fluctuations in the fiber to become significant. This leads to the generation of a backward-propagating Stokes wave that scatters off the density fluctuations and interacts with the incident wave, resulting in amplification or attenuation depending on the phase relationship between the two waves.

What are the applications of SBS in optical fibers?

SBS has several applications in optical fibers, including optical amplification, frequency conversion, and sensing. SBS-based optical amplifiers are used in long-distance optical communication systems, while SBS-based frequency converters are used for wavelength conversion in optical communication networks. SBS also has potential applications in fiber optic sensors for measuring temperature, strain, and pressure.

What are the challenges in controlling SBS in optical fibers?

One of the main challenges in controlling SBS in optical fibers is the threshold power for SBS to occur, which is affected by various factors such as fiber length, core diameter, and temperature. Another challenge is the nonlinear nature of SBS, which can lead to unwanted effects such as signal distortion and crosstalk in optical communication systems.

How can SBS be mitigated in optical fibers?

There are several techniques to mitigate SBS in optical fibers, including using fibers with a larger core diameter, decreasing the fiber length, and using fibers with a higher SBS threshold. Another approach is to use SBS suppression techniques such as Brillouin optical time domain analysis (BOTDA) and Brillouin optical time domain reflectometry (BOTDR) to measure and compensate for the SBS-induced distortions in optical communication systems.

Similar threads

Replies
1
Views
1K
Replies
22
Views
2K
Replies
25
Views
2K
Replies
2
Views
2K
  • Optics
Replies
9
Views
3K
  • Optics
Replies
1
Views
850
Replies
2
Views
966
Replies
2
Views
8K
Back
Top