self-phase modulation


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self-phase modulation

[¦self ‚fāz ‚mäj·ə′lā·shən]
(optics)
The temporal action of a medium whose index of refraction increases with increasing optical intensity on time-varying optical signals or pulses, whereby the rising front edge of the pulse is shifted to lower frequencies and the rear of the pulse is shifted to higher frequencies.
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References in periodicals archive ?
Afterwards, the accumulated impact of nonlinear self-phase modulation leads to the compensation of the chirp.
Among all, recently a soliton based pulse compression stage and a self-phase modulation (SPM) based pulse reshaping stage become an optimum choice.
Liu, "Passive optical self- limiter using laser induced axially symmetric and asymmetric transverse self-phase modulations in a liquid crystal film," Optics Letts., Vol.
Compression of optical pulses chirped by self-phase modulation in fibers" JOSA B 1(2) 139-149.
The RZ signal achieves sufficient spectral broadening induced by self-phase modulation (SPM) effect when passing through the DF-HNL-PCF.
The features seen can be described in terms of soliton fission and dispersive wave emission in time domain while in terms of self-phase modulation and Cherenkov radiation in spectral domain, respectively.
The intensity dependent refractive index of silica medium gives rise to three effects, self-phase modulation (SPM), cross gain modulation (XGM), and four wave mixing (FWM).
The challenge in this instance is a form of what is called self-phase modulation, in which the phase of the light wave changes over an interval in response to its intensity.
In addition to FWM, self-phase modulation and cross-phase modulation (XPM) arise from the Kerr effect.
The sources of pulse broadening are the gain-bandwidth of the optical amplifier, pulse broadening during gain saturation, dispersion in the cavity and self-phase modulation effects.
With increased power levels, the different fiber nonlinearities come into picture such as four wave mixing (FWM), self-phase modulation (SPM), cross-phase modulation (CPM), stimulated Raman scattering (SRS), and stimulated Brillouin scattering (SBS).
Olson, "Self-phase modulation and spectral broadening of optical pulses in semiconductor laser amplifiers", IEEE J.