Questions tagged [optical-fibre]

A flexible, transparent, fine fibre made of extruded silica to function as a wave guide to transmitting signals through light

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1answer
166 views

Cheap fiber communication [closed]

Is there a cheap fiber optic communication solution? I mean, whithbtarget price around $1 for one side. I don't care about bandwidth, just want it optical.
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1answer
596 views

In Fiber Optic Telephone line, how light signals are converted to the voice signals? [closed]

I have been learning how internet data travels in different kind of Broadband access. In case of telephone broadband, voice signals travels through the telephone line. At the user premise, the modem ...
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1answer
1k views

Media converter (eth/fiber) problem in communication

I have a system which looks like that: CPU(macbook)<-->thunderbolt<-eth->ethernet media converter<-fiber->ethernet media converter<-eth->raspberry pi 2. Both CPU and RP2 have static IPs. ...
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0answers
172 views

How can we measure the coupling loss in a fused fiber Y coupler?

I'm trying to understand how the (power) loss in optical fibre works and I'm having some trouble. This is a classic 50/50 fused fibre Y coupler. The output on port 2 is the same as port 3 (so half ...
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1answer
210 views

Oscilloscope for SFP+ Host Board Compliance testing

What major criteria should I consider when buying an oscilloscope to test compliance for an SFP+ host board? Examples would be helpful as well. I am looking for a high-end product since this is for ...
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3answers
7k views

Convert dB/km to /km

please explain How is 0.22 dB/km equal to 0.0507 km^(-1) I tried doing 10 log x = its value in dB but it doesn't work here
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1answer
2k views

How would the SFP+ transceiver interface (Linear vs Limiting) affect my design?

On my board, I'd like to replace an RJ45 port with an SFP+ transceiver to increase data rate to 10Gbps. In choosing an SFP+ module, I have noticed that the only MSA compliant interfaces can be ...
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1answer
750 views

Differences and conversion between encoding techniques (NRZI, Manchester, MLT3)

I'm currently reading a lot about different encoding techniques for data transmission, in particular ethernet, fiber (and usb). 10Base Tx ethernet uses Manchester encoding for data transmission. But ...
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2answers
1k views

Low cost UART over fibre

I need to extend an existing 5V UART over fibre for isolation reasons. Digital isolators / optos are no good as I need more isolation than that (0.1pF coupling max. from one side to the other). UART ...
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1answer
90 views

Fiber transceiver operation

I recently bought a SFP fiber transceiver module to play around with. My idea was to connect the transmitter pins to a waveform generator, loop the optical output to the optical input with a fiber ...
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0answers
74 views

Custom fiber optic cable simulation

I am looking to create a custom & precise static optical distribution along the length of a fiber optic cable. The idea involves manipulating an optical fiber during manufacturing to produce the ...
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2answers
102 views

Drive electo-optic modulators with FPGA

I am currently using an FPGA (Virtex II NI RIO7831R) to generate the clock for a pulse generator used to drive a Linbo3 optical phase modulator. http://www.jdsu.com/en-us/Optical-Communications/...
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1answer
96 views

Does fibre optic cable bandwidth stack over the length of the cable?

If the maximum data bandwidth is sent down a fibre optic cable, constantly, maxing out the cable's capacity, how much data is in transit over any given distance? Perhaps I have an incorrect ...
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2answers
5k views

Can we send multiple signals in same core at the same time in the fiber optics? If yes, how? [duplicate]

I am curious to know how exactly does the fiber optics works. I understand the basic concepts of the fiber optics communications but am curious to know if there is a way to send multiple signals in ...
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1answer
616 views

Optical coupler and splitter difference and explanation

Internally, what is the difference between an optical coupler and an optical splitter. If I have an input A on a 3db splitter, creating outputs B and C, can I send signals on B and C and have them ...
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1answer
98 views

How can I make an optical circulator? [closed]

I need to a single mode 1550 optical circulator at my lab. I have a varied supply of components, but no circulator. Any idea how I can make one myself? Perhaps using coupler and isolator? Thanks. -D
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2answers
336 views

Waveguides: How can you propagate at only one frequency?

In a rectangular waveguide, we know we can find cut off frequency as a function of mode and geometry. Is there a way to design the waveguide so to ensure that we can limit the frequency of ...
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1answer
103 views

Fiber optics module: built in or plug-in module?

I am designing an Internet of Things system with fiber optics as its transmission medium (for its immunity to various kinds of interference and inability to carry a shock from a failed high voltage ...
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1answer
89 views

Optic fiber with partial diffusion

I've seen a partially diffusing flexible optic fiber used in several places, but I can't figure out what exactly to google to find the stuff. Does it have a name? I'd like to stick leds to each end ...
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2answers
81 views

What grade of fibre is used in optical fibre displays?

Optical Fibre displays such as Fibre Optic Trees probably isn't going to use cable designed for 10GBase-ER. So what grade of fibre is used in these displays? Clearly, it can't be terribly expensive. ...