Abstract
One major source of modal noise in optical fiber communication systems originates in the rapid changes, or chirping, of the laser diode emission wavelengths as the laser junction heats and cools with the pulsed modulation of the drive current. A multimode fiber with finite differential mode delay will convert this wavelength chirping to time variations in the lateral intensity distribution, or speckle pattern, at large distances from the source, giving rise to modal noise at lossy interfaces.
© 1981 Optical Society of America
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