Recently, we solved the coupled-mode equations for Bragg scattering (BS) in the low- and high-conversion regimes, but without the effects of nonlinear phase modulation (NPM). We now present solutions and Green functions in the low-conversion regime that include NPM. We find that NPM does not change the lowest-order conversion efficiency, but prevents complete separability (freedom from temporal entanglement). This problem is overcome to some degree by pre-chirping the pumps, which mitigates the effects of NPM. We conclude that arbitrary reshaping of the output modes and nearly complete separability are still possible, even when the effects of NPM are included. Finally, the effects of using different input signals are considered, and we conclude that using the natural input modes of the system drastically increases the efficiency.
Parametric devices based on four-wave mixing in fibers enable the amplification, frequency conversion and phase conjugation of optical signals. They can also be used to buffer and regenerate signals. In this paper some recent research on parametric devices is
reviewed briefly.
KEYWORDS: Optical fibers, Signal processing, Palladium, Phase shift keying, Signal to noise ratio, Frequency conversion, Phase conjugation, Protactinium, Single mode fibers, Polarization
Parametric devices based on four-wave mixing in fibers enable the amplification, frequency conversion and phase conjugation of optical signals. In this paper some recent research on parametric devices is reviewed briefly.
Parametric devices based on four-wave mixing in fibers provide many functions that are required by optical communication systems. When operated in the linear regime, parametric devices provide amplification, frequency conversion and phase conjugation, all with high gain levels and broad bandwidths. They can also be used to monitor and switch signals. When operated in the nonlinear regime, parametric devices regenerate optical signals. In this paper the current status of research on parametric devices is reviewed briefly, and some promising directions for future research are indicated.
Recent advances in fiber parametric amplifiers are reviewed. The physics, operation and applications of two-pump parametric fiber amplifiers are described. Methods for broadband, equalized parametric gain exceeding that of conventional EDFAs are discussed. The inherent nonlinear nature of parametric amplifiers forms a basis for all-optical signal processing. Optical regeneration in high-order, two-pump parametric amplifiers is described and demonstrated. All-optical penalty reversal using polarization-invariant signal conjugation is discussed and described over multiple SMF spans
A problem of scatterd radiation spectrum linewidth of stimulated Brillouin scattering (SBS) in multi-species plasma is studied. It is shown that the threshold and spectral composition of SBS can be varied by changing the concentration of species of the plasma. A possibility of existence of the scattered radiation spectrum with the frequency line width comparable to the ion-acoustic frequency is revealed.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.