Light Emitting Diode (LED) Driving 10km Waveguide

In summary, the problem involves a 10 km long single mode waveguide driven by a LED with a spectral width of 60 nm centered at 800 nm. The material dispersion for wavelengths near 800 nm is -100 ps/km/nm. The first question asks for the length of the optical pulse when it arrives at the end of the waveguide, given that the LED is pulsed on and off in 5 ns. The second question asks for the maximum practical pulse rate for the system, considering the need for distinguishable pulses.
  • #1
mogul28
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Homework Statement


A Light emitting diode (LED) drives a single mode waveguide that is 10 km long, and has a material dispersion of – 100 ps/km/nm for wavelengths near 800 nm. The LED radiation has a spectral width of 60 nm and is centered at 800 nm.

a) If the LED is pulsed on and off in 5 ns, what is the length of the optical pulse when it arrives at the end of the waveguide?
b) What is the maximum practical pulse rate for this system, if the received pulses are to be distinguishable from one another?



Homework Equations





The Attempt at a Solution

 
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  • #2
mogul28 said:

Homework Statement


A Light emitting diode (LED) drives a single mode waveguide that is 10 km long, and has a material dispersion of – 100 ps/km/nm for wavelengths near 800 nm. The LED radiation has a spectral width of 60 nm and is centered at 800 nm.

a) If the LED is pulsed on and off in 5 ns, what is the length of the optical pulse when it arrives at the end of the waveguide?
b) What is the maximum practical pulse rate for this system, if the received pulses are to be distinguishable from one another?

Homework Equations



The Attempt at a Solution

What have you tried ?

Where are you stuck ?
 

1. What is a light emitting diode (LED)?

A light emitting diode (LED) is a semiconductor device that emits light when an electric current is passed through it. It is commonly used in electronic devices such as TV screens, computer monitors, and lighting fixtures.

2. How does an LED drive 10km waveguide?

An LED can drive a 10km waveguide by using a high-power laser diode that transmits light through a fiber optic cable. The light is then guided through the waveguide, which can span up to 10km, before being detected and converted back into an electrical signal.

3. What are the advantages of using LED driving 10km waveguide technology?

LED driving 10km waveguide technology offers several advantages, including low power consumption, high data transmission rates, and immunity to electromagnetic interference. It also allows for longer transmission distances compared to traditional copper wire connections.

4. Are there any limitations to using LED driving 10km waveguide?

One limitation of LED driving 10km waveguide is that it requires specialized equipment and installation, making it more expensive than traditional wiring. Additionally, the signal can be affected by external factors such as temperature and physical disturbances to the waveguide.

5. What are some common applications of LED driving 10km waveguide?

LED driving 10km waveguide technology is commonly used in telecommunications, data centers, and industrial automation systems. It is also being explored for use in high-speed internet connections and long-distance data transmission in the aerospace industry.

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