Abstract
Optical phase jitter limits the performance of amplified differential-phase-shift-keyed optical communication systems. We propose an approach to evaluate the phase jitter for arbitrary pulses in dispersion-managed links based on the moment method. This calculation requires only the knowledge of the unperturbed optical signal, therefore avoiding computationally intensive Monte Carlo simulations. We apply this method to a dispersion-managed soliton system and a quasi-linear dispersion-compensated channel and demonstrate its validity by comparing the obtained results with Monte Carlo simulations.
Highlights
There has recently been a renewed effort to develop coherent optical communication systems, differential phase-shift keying[1,2,3] (DPSK), which does not require a local oscillator to perform decoding
We propose a semianalytic approach that is valid for arbitrary pulses in DM optical links, following the methodology presented in Ref. 12
The obtained unperturbed optical field is used together with the moment method[13] and statistical properties of the noise to evaluate phase jitter to first order. This approach is validated by comparison with direct Monte Carlo simulations in a DM soliton system and a quasi-linear channel, and both show excellent agreement
Summary
There has recently been a renewed effort to develop coherent optical communication systems, differential phase-shift keying[1,2,3] (DPSK), which does not require a local oscillator to perform decoding. The physical mechanism that limits performance in coherent systems is amplified-spontaneous-emission (ASE) noise-induced phase jitter.[8] Analytic derivations of the phase uncertainty for soliton systems were carried out by use of perturbation theory and the variational method. These studies assume an analytically determined pulse shape and a constant-dispersion optical link.[9,10] A semianalytic model of the phase jitter was recently proposed for dispersion-managed (DM) soliton transmission,[11] based on a Gaussian ansatz for the optical field. This method provides some physical insight about the mechanisms that create phase jitter in the context of arbitrary optical pulses
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
