Fiber Definition and 202 Threads

  1. D

    Searching for Fiber Optic Information? Look No Further!

    Does anyone know of any links to some good fiber optic information? I'm not looking for suppliers or sales pitches...rather something like www.Microwaves101.com , but for fiber optics... Other than arguments on comparisons, I haven't found too much in PF. Thanks.
  2. G

    Help needed: coupling light from a LED into an optical fiber

    First let me preface this by saying by physics-fu is remedial at best. I am a neuroscientist by training, but need a little help with piece of equipment I am designing, so any ideas or input would be greatly appreciated. Basically, I need to figure out a way to efficiently couple a light...
  3. B

    Which Book on Fiber Bundles is Best for Beginners with an Intuitive Approach?

    Becuase of geometric phase,I'm looking for a good book on fiber bundles, with a minimum of prerequistes and that takes a more intutive rather than formal approach.I am reading a book called modern differential geometry for physicists. It is a good book but sometimes abstract. I know about...
  4. N

    Refraction and fiber optic cable diameter

    Hello there, I'm wondering if there is any restricting reason why fiber optic cables are not made thicker. Regardless of the practical applications, is there any reason you can't make a fiber optic cable that is only 2m long but 2cm thick (compared to the normal 0.0125 cm thick)? Does width of...
  5. T

    Fiber optic internet connection?

    In a few days, people from my ISP are coming to my house to install super-fast fiber optic internet. Right now, I am using a DSL, or about a 3-meg connection speed. According to what I've heard, a fiber-optic network connection can give up to 20 megs. I use my computer for gaming, especially...
  6. J

    Power over Fiber residential application

    I have a problem that can't be solved. So then, I put it to this Physics Forum to see if anyone comes up with a brain storm ( or directs me to a solution which my expert may have been unaware of ). Doing Power over Fiber is "impossible" today for a broad-based residential application...
  7. B

    How Can a Function Be a Submersion on Manifolds Without Forming a Fiber Bundle?

    How would one go about to construct a function on (smooth) manifolds that is a submersion without being (the projection map of) a fiber bundle?
  8. W

    Fiber Optics Project: Determining Refractive Index w/ Int.

    [SIZE="4"]Hello everybody I have my project on "Determination of some parameters (mainly the refractive index)of an optical fiber using multiple beam interference" i need some data about : Fizeau fringes shape derivation of an optical wedge at transmition and reflection. any help..?
  9. P

    I need the acoustic properties of all materials more specifically carbon fiber

    Does anybody know the acoustic properties of carbon fiber. I've used google extensively but I've had no success. Is there a well known reference book within the materials engineering realm that gives the sound absorption coefficient (also known as the Noise Reduction Coefficient (NRC)) of varius...
  10. hxtasy

    How do fiber optic pressure sensors work?

    In a nutshell? i cannot seem to find a lot of information online about these. Could someone please help? thanks!
  11. C

    Increase the coupling efficiency of fiber

    I learn that increase of the beam size of the laser before coupling it to the fiber can increase the coupling efficiency of it. Can I know why is this so? Maybe the fiber is of very small diameter, and the focal lens in front of the fiber can't focus all the laser to this small diameter...
  12. kandelabr

    Carbon fiber, kevlar pressure vessel design standards

    hi, i can't find any standard defining design of unfired pressure vessels made from carbon fiber, kevlar, fiberglass or similar high tensile strength materials*. do standards like these even exist, since these materials are relatively new? * you know any more similarly competitive materials...
  13. R

    Index of refraction of an optical fiber

    Homework Statement The glass core of an optical fiber has an index of refraction 1.62. The index of refraction of the cladding is 1.47. What is the maximum angle a light ray can make with the wall of the core if it is to remain inside the fiber? Homework Equations theta = sin ^-1...
  14. Topher925

    Is working with fiber optics difficult?

    This isn't really an "engineering" question but I really didn't know where else to ask. I just want to know if any of you out there have experience working with fiber optic wires and how difficult they are to work with. Is there any special equipment involved if you are not going to be splicing...
  15. K

    Designing a Rocket Airframe with Carbon Fiber

    I'm a sophomore Aerospace major, and I'm also a new member to a rocket student group at my university. We are currently involved in a competition with NASA, and they have asked our group to write a Preliminary Design Review. Everything was split up, and I was left with the rocket's airframe...
  16. K

    Fiber optic based beam splitter

    Hi, Does any of you know any commercially available fiber optic - beam splitter? It is very crucial for my experiment where I distribute an electromagnetic beam from one laser source (infrared) to two waveguides.. Since I am coupling using fibers, I require a fiber optic based beam...
  17. W

    Fast And Slow Muscle Fiber Conundrum

    Question 1, WHICH SET WILL PRODUCE MORE, AND MORE OVERALL FORCE FROM THE SLOW MUSCLE FIBERS, THUS IN TURN MORE TENSION TO THEM. A slow set of slow reps 3/3, using 75% of your 1RM, let us call this 100pounds, 6 repetitions = 36 seconds. You fail faster in the faster rep with the same...
  18. O

    Optical Fiber Transfer Function (attenuation and dispersion)

    I have a few questions regarding the transfer function of a SMF. I'm using the below equation to simulate the effect a single mode fiber (SMF) has on the optical field after some distance \textit{z}. \begin{equation} S_{out}(\omega) = S_{in}(\omega)\exp\left...
  19. N

    Can a CO2 laser be cabled with optical fiber?

    Hi, i have a question about optical fiber and CO2 laser Can a CO2 laser be cabled with optical fiber? Wavelength of 10 micron
  20. P

    Transmitting Images through a Coherent Fiber Bundle

    A coherent fiber bundle is very useful in transmitting images. Let's say we have a gaussian beam from a laser as our source. Now the acceptance angle(2*alpha) is determined from the location of the beam waist, right? The light ray will then go down the fiber core with the use of a converging...
  21. S

    Seeking fiber optics info - power transmission

    Hi, first time poster here. I am a mechanical engineer, and I am looking for information on using fiber optics to transport solar energy. There is a new field called daylighting, that uses solar energy for lighting during daylight hours. It uses a variety of gadgets to do this, and some...
  22. J

    How Can I Increase the Intensity of Light from a Fiber Optic for CCD Imaging?

    I hope this post in the appropriate forum. I have a spectrograph and a CCD imaging chip that I am using for an optics experiment. The light coming into the spectrograph is through a 10 micron fiber optic. In order put the light on the CCD imaging chip the way I want it, I believe I need to...
  23. N

    Max Power for Fiber Connectors?

    Max Power for Fiber Connectors?? Does anyone know the maximum peak or average power for FC/APC fiber optic connectors? My system is constantly burning the cores of these connectors. I have a maximum of 600mW (average) and 1KW (peak) passing through these connectors.
  24. Loren Booda

    Can earthbound fiber optics replace communication satellites?

    With the threat of satellites being blown up, would fiber optics offer a practical alternative for communications or other applications?
  25. J

    Can carbon fiber make a better bulletproof vest?

    Hey all, I wonder if anyone can answer this for me: Why hasn't carbon fiber been used to make better bulletproof vests (ignoring cost)? Doesn't carbon fiber have a higher tensile strength than Kevlar? Isn't it lighter? Also, wouldn't a solid version, of carbon fiber reinforced plastic...
  26. J

    Foliation, fibration, fiber bundle?

    what's the difference among those three objects? Any body can give me some examples? Thanks
  27. C

    Laser through optic fiber - out before through

    looking for information about phenomena when light through fiber out before through and photon reverses at exit time to negate entering photon leading to equilibrium of energy transfer. think it was coated with iridium or something. not sure. saw it reported on shortnews.com about a year or so...
  28. S

    Nylon fiber guitar string sound

    Why does the sound of an old nylon fiber guitar base string on the guitar become suddenly "livelier", or "brighter", after being loosened and then retightened back to its normal tuning?
  29. S

    Multipath dispersion of a pulse of light in an optical fiber.

    Homework Statement Multipath dispersion of a pulse of light in an optical fiber. How is this problem solved?
  30. J

    Material dispersion calculation (optical fiber)

    Material dispersion in optical fiber is defined as D = (-λ/c)×(d²n/dλ²) λ is wavelength, c is speed of light and n is refractive index. I was given a graph of λ²×(d²n/dλ²) against λ, refractive index of core of fiber, index difference and diameter of the core and cladding. What I would like to...
  31. K

    Fiber Optic Refraction: Calculating Light Ray Distance and Reflections

    Question: A ray of light enters a light fiber at an angle of 15degree with the long axis of the fiber. Calculate the distance the light ray travels between succesive reflections off the sides of the fiber has an index of refraction 1.6 and is 10^{-4}mm in diameter.
  32. M

    Can a Steam Engine Be Made with Carbon Fiber Components?

    Would it be possible to build a steam engine using parts made primarily of carbon fiber? Any engine?
  33. C

    Which Lasers Are Suitable for Fiber Optic Communication?

    Homework Statement Which of the following can / cannot be used for fiber optic communication. What is the general rule / cut-off (in terms of wavelength) for deciding ? Thank you. Choices (Laser type/wavelength, nm) Argon fluoride (UV) 193 Krypton fluoride (UV) 248 Xenon...
  34. J

    Maximun bps rate on an ITU channel over standard single mode fiber

    I have to find the maximun bps that it can be reach using a point-to-point link of 40 km long of optic fiber. I use an ITU normalized channel (100 GHz optic BW). So, I can choose any electric modulation and any optic modulation, too. Anybody could help me? Any answer is welcome. Thanks.
  35. T

    Going completely fiber optic computers

    So, because light is so fast and fiber optic cables can carry 3 different signals at at time and travel at the "speed of light"; why don't we have the technology to develop a computer that uses all fiber optics instead of wires or optics and wires (if your lucky) I'm sure that if we did know...
  36. T

    Simple Fiber Optics Communications System

    Hi, it would be great if someone could give me a conceptual explanation of how a simple circuit of fiber optics communication works, since this is where the world is, in a communications sense.
  37. T

    Optical Fiber attenuation coefficient

    Hi, I am curious to know what is a typical numerical value for the attenuation coefficient of common optical fibre. Please don't include anything strange in the units like dB since I am new to that. Thanks.
  38. N

    Help with physics of carbon fiber guitar case suspension system

    I'm developing a range of carbon fiber cases for guitars, violins and laptops. The cases have a suspension system of high density closed cell foam pads which hold the instrument where it is strongest eg base of the body, where the neck joins the body. It has been suggested that it would be...
  39. B

    Stress on 25 micron Fiber Under Elongation Load

    This doesn't seem particularly hard, thought it was simply an F/A situation but apparently not. A fiber with a diameter of 25 micro meters is subjected to elongation load of 25 g along the fiber axis. What is the stress on the fiber? Is the applied stress a shear or a tensiles stress. I said...
  40. S

    Looking for a fiber optics paper

    I found an interesting paper a few weeks ago, but I haven't been able to find it again. The paper concerned using an electro-optic (LiNbO3) phase modulator to generate bandwidth on a pulse, and then using a spatial light modulator to shape the bandwidth and get a nice clean compressed pulse...
  41. N

    Coulomb's Law and insulating fiber

    A rigid, insulating fiber runs along a portion of the y-axis; the fiber isnot free to move. Gravity acts downward (g = 9.81 m/s2).A charge Qa = -3 µC is fixed to the fiber at the origin. A bead with a hole drilled through its center is slipped over the fiber andis free to move along the fiber...
  42. W

    What Role Does Optical Fiber Play in Fiber Lasers?

    I was wondering if anyone could tell me about fiber lasers. I don't mean those used as transmitters on optical fiber systems; I mean lasers that contain optical fibers as components. I know that it can be done, but I don't know what the structure is like. What part does the fiber play? Is...
  43. Ivan Seeking

    Fiber art: A new alternative to paint?

    This human interest story caught my attention. Could this be a new art form? http://www.lubbesmeyerstudio.com/_media/popups_and_thumbnails/l_poppies.jpg http://www.lubbesmeyerstudio.com/
  44. S

    What Resin or Epoxy is Best for Carbon Fiber Projects?

    I am starting to learn how to make carbon fiber products i am not sure about what type of resin/epoxy? to use does the resin/epoxy give it that nice exterior? or is something else needed? any suggestions in general would be much appreciated thank you
  45. E

    Optical fiber transmitter and receiver (photodarlington)

    Hello, How can we convert parallel-to-serial address and send it as an optical signal? Have a look at the link below if you folks don't know what I mean - the last (3-4 lines) paragraph of the pdf file: http://www.hep.yorku.ca/menary/courses/electronics/3150/lab_manual/opt.pdf...
  46. cronxeh

    Carbon Fiber Kits: Safety Test Results for Motorcycle Parts

    Hey there. I was browsing a motorcycle forum and stumbled upon a particular place where the moderator was in the process of selling his own manufactured "carbon fiber kits". Naturally I asked him if the people who designed those replacement parts had any engineering background, and if he had...
  47. O

    Can I Use Carbon Fiber to Strengthen Gas Powered Scooter Parts?

    Im looking to have several gas powered scooter parts made in carbon fiber from a cad file. Such things as steering pole, rims, deck, air scoop, and a distant goal of a frame. scooters in question www.goped.com. I understand some basics of carbon fiber, but pretty much just what you can learn...
  48. tandoorichicken

    Diameter of Human Muscle Fiber - Bicep

    On average, what is the diameter of a human muscle fiber (say, a bicep muscle)?
  49. A

    Guiding Wave Through Diffraction in Photonic Crystal Fiber

    Hi, Can someone tell me how a wave is guided (in a fiber for instance) thinking in term of diffraction (or scattering) and not in term of successive reflections. And my second question is : would it be possible to "extrude" a plan diffractive element in a fiber to guide wave and have the...
  50. G

    C vs. Fiber Optics: Speed Comparison and Myths Debunked

    Is C less than 300,000 kph when traveling through fiber optic cable? Would a pulse of light travel any faster through a straight fiber optic than through a tightly coiled fiber of the same length? Thanks, Glenn
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