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You can assume either electric or magnetic field for simplicity, they both are present in light as it's electromagnetic wave.

Now, mode is a sustainable pattern in the fiber optic cable. Imagine waves on a string, only the integral multiples of half wavelengths effectively form a mode. Let there be a complex output pattern at the output of a string. It turns out if we aren't playing with it continuously, it will be essentially periodic, maybe long period. And we can always reduce it via fourier transforms to a sum of some basic modes. Imagine the output at the end of a MMF(multi mode fiber) as waves on a string with intensity output as the wave amplitude on the string. It may be complex. But you can simplify the output by considering it as a sum of several modes. You can play with waves on a string here. It won't do a fourier transform though. http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html

The concept is a little different for SMF and MMF. In case of SMF, Ray theory fails and light propagates as a wavefront as explained here: Single-mode fibers and ray-theory of lightSingle-mode fibers and ray-theory of light

You can assume either electric or magnetic field for simplicity, they both are present in light as it's electromagnetic wave.

Now, mode is a sustainable pattern in the fiber optic cable. Imagine waves on a string, only the integral multiples of half wavelengths effectively form a mode. Let there be a complex output pattern at the output of a string. It turns out if we aren't playing with it continuously, it will be essentially periodic, maybe long period. And we can always reduce it via fourier transforms to a sum of some basic modes. Imagine the output at the end of a MMF(multi mode fiber) as waves on a string with intensity output as the wave amplitude on the string. It may be complex. But you can simplify the output by considering it as a sum of several modes. You can play with waves on a string here. It won't do a fourier transform though. http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html

The concept is a little different for SMF and MMF. In case of SMF, Ray theory fails and light propagates as a wavefront as explained here: Single-mode fibers and ray-theory of light

You can assume either electric or magnetic field for simplicity, they both are present in light as it's electromagnetic wave.

Now, mode is a sustainable pattern in the fiber optic cable. Imagine waves on a string, only the integral multiples of half wavelengths effectively form a mode. Let there be a complex output pattern at the output of a string. It turns out if we aren't playing with it continuously, it will be essentially periodic, maybe long period. And we can always reduce it via fourier transforms to a sum of some basic modes. Imagine the output at the end of a MMF(multi mode fiber) as waves on a string with intensity output as the wave amplitude on the string. It may be complex. But you can simplify the output by considering it as a sum of several modes. You can play with waves on a string here. It won't do a fourier transform though. http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html

The concept is a little different for SMF and MMF. In case of SMF, Ray theory fails and light propagates as a wavefront as explained here: Single-mode fibers and ray-theory of light

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Harshfi6
Harshfi6
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You can assume either electric or magnetic field for simplicity, they both are present in light as it's electromagnetic wave.

Now, mode is a sustainable pattern in the fiber optic cable. Imagine waves on a string, only the integral multiples of half wavelengths effectively form a mode. Let there be a complex output pattern at the output of a string. It turns out if we aren't playing with it continuously, it will be essentially periodic, maybe long period. And we can always reduce it via fourier transforms to a sum of some basic modes. Imagine the output at the end of a MMF(multi mode fiber) as waves on a string with intensity output as the wave amplitude on the string. It may be complex. But you can simplify the output by considering it as a sum of several modes. You can play with waves on a string here. It won't do a fourier transform though. http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html

The concept is a little different for SMF and MMF. In case of SMF, Ray theory fails and light propagates as a wavefront as explained here: Single-mode fibers and ray-theory of light