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Polarization mode dispersion

About: Polarization mode dispersion is a research topic. Over the lifetime, 5147 publications have been published within this topic receiving 80055 citations. The topic is also known as: PMD.


Papers
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Journal ArticleDOI
TL;DR: In this article, the propagation of short optical pulses in a nonlinear directional coupler operating in the normal dispersion regime is investigated, where coupling occurs between the two orthogonally polarized modes that are aligned with the birefringence axes of the fiber.
Abstract: The propagation of short optical pulses in a nonlinear directional coupler operating in the normal dispersion regime is investigated. The specific example of a birefringent periodically rocked fiber filter where coupling occurs between the two orthogonally polarized modes that are aligned with the birefringence axes of the fiber is considered. In the simulations, a bell-shaped input pulse is injected into one polarization mode: for different input peak powers, the energy present in the same mode at the output of a coupler, which is one or two coupling lengths long, is calculated. The nonlinear temporal broadening, due to the combined effect of group velocity dispersion and self-phase modulation, sets a fundamental lower limit to the time width of the input pulses. When pulses shorter than this critical value are used, the power-dependent energy switching characteristics of a device one coupling length long gets substantially spoiled. Effects related to the finite spectral bandwidth of the fiber filter are discussed. Numerical simulations are compared to recent experimental results on the self-switching of picosecond pulses in the visible (615 nm) with a birefringent rocking fiber. >

30 citations

Proceedings ArticleDOI
17 Mar 2001
TL;DR: In this article, the essentials of dispersion compensating technology for nonzero dispersion shifted fibers are discussed and different solutions have been proposed in the literature to achieve the required dispersion compensation characteristics with primary emphasis being on dispersion compensated fiber.
Abstract: This presentation reviews the essentials of dispersion compensating technology for nonzero dispersion shifted fibers. The implications of using the various existing technologies are discussed. Three recent developments in the world of long haul transmission has required one to re-evaluate the nature of dispersion compensation in NZ-DSF based systems. These are: increased bandwidth (> 32 nm), ultra long haul transmission distances (distances in excess of 2000 km) on land and 40 Gbps systems. All of the above, dramatically change the dispersion compensation requirement. We will discuss the different solutions that have been proposed in the literature to achieve the required dispersion compensating characteristics with primary emphasis being on dispersion compensating fiber.

30 citations

Journal ArticleDOI
TL;DR: In this article, a new type of telecom optical polarization and amplitude modulator, based on a balanced Mach-Zehnder interferometer configuration, coupled with a polarization-preserving sum-frequency generation (SFG) optical setup, was proposed for long range QKD.
Abstract: To implement the BB84 decoy-state quantum key distribution (QKD) protocol over a lossy ground-satellite quantum uplink requires a source that has high repetition rate of short laser pulses, long term stability, and no phase correlations between pulses. We present a new type of telecom optical polarization and amplitude modulator, based on a balanced Mach-Zehnder interferometer configuration, coupled to a polarization-preserving sum-frequency generation (SFG) optical setup, generating 532 nm photons with modulated polarization and amplitude states. The weak coherent pulses produced by SFG meet the challenging requirements for long range QKD, featuring a high clock rate of 76 MHz, pico-second pulse width, phase randomization, and 98% polarization visibility for all states. Successful QKD has been demonstrated using this apparatus with full system stability up to 160 minutes and channel losses as high 57 dB . We present the design and simulation of the hardware through the Mueller matrix and Stokes vector relations, together with an experimental implementation working in the telecom wavelength band. We show the utility of the complete system by performing high loss QKD simulations, and confirm that our modulator fulfills the expected performance.

30 citations

Journal ArticleDOI
TL;DR: In this paper, the suppression of one of the polarization states is realized by introducing index-matched cladding defect waveguides, and the leakage loss of the index matched polarization state can be enhanced by nearly 4 orders of magnitude.
Abstract: We propose the realization of single-polarization operation in highly birefringent photonic crystal fibers. The suppression of one of the polarization states is realized by introducing index-matched cladding defect waveguides. The leakage loss of the index-matched polarization state can be enhanced by nearly 4 orders of magnitude. In particular, polarization-dependent loss larger than 2.97 dB/m with transmission loss lower than 0.03 dB/m in a wavelength region ranging from 1.54 to 1.566 μm can be realized in one such fiber.

30 citations

Journal ArticleDOI
TL;DR: In this paper, a 40-Gb/s single-channel soliton transmission was performed on a dispersion-shifted fiber (DSF) embedded in a link connecting Rome to Pomezia.
Abstract: A 40-Gb/s single-channel soliton transmission was performed on a dispersion-shifted fiber (DSF) embedded in a link connecting Rome to Pomezia. The soliton system was based on the transmission of pulses with orthogonal states of polarization (alternate polarizations) to limit the impairments due to the soliton interaction. The performance of the system operating in the field has been compared with results obtained in the laboratory. While in the laboratory the system showed a nearly-stable error-free transmission over 700 km, strong temporal fluctuations of the performance have been observed in the field trial. Numerical simulations have shown that such a degradation, and in particular the fluctuation of the Q factor, is mainly due to a polarization mode dispersion of the installed cables larger than that of the fibers used in the laboratory. However, 500 km error-free transmission was observed in the field for time interval longer than one hour, demonstrating the potentiality of a 40 Gb/s soliton system with alternate polarizations operating with long amplifier spacing (100 km) without in-line control.

30 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202332
202275
202145
202069
201968
201868