![]() ![]() Additionally, the dispersion results in a walk-off between the channels and thereby reduces the effect of XPM. In a second step dispersion leads to a transformation of the phase modulation into a power variation. In dense wavelength-division multiplexing (DWDM) applications with intensity modulation and direct detection (IM-DD), the effect of XPM is a two step process: First the signal is phase modulated by the copropagating second signal. Nonlinear optical Pulse Compression of ultrashort pulsesĭisadvantages of XPM XPM in DWDM applications.Other advantageous applications of XPM include: XPM is among the most commonly used techniques for quantum nondemolition measurements. This technique is applied to fiber optic communications. ContentsĬross-phase modulation can be used as a technique for adding information to a light stream by modifying the phase of a coherent optical beam with another beam through interactions in an appropriate non-linear medium. When the optical power from a wavelength impacts the refractive index, the impact of the new refractive index on another wavelength is known as XPM. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators. WikiMili Cross-phase modulation Last updated June 23, 2020Ĭross-phase modulation (XPM) is a nonlinear optical effect where one wavelength of light can affect the phase of another wavelength of light through the optical Kerr effect.
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