Multilevel quantization of optical phase in a novel coherent parametric mixer architecture

Kakande, Joseph; Slavı́k, Radan; Parmigiani, Francesca; Bogris, Adonis; Syvridis, Dimitris; Grüner-Nielsen, L.; Phelan, Richard; Petropoulos, P.; Richardson, David J.

doi:10.1038/nphoton.2011.254

Cited by 154 publications

(126 citation statements)

References 29 publications

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“…Besides their fundamental novelty, their nature of phase objects and the possibility to nucleate and annihilate these states individually confer them exceptional properties as phase bits (F-bits), counterparts of the usual dissipative solitons as intensity bits. Owing to this, these F-bits bring the plasticity and robustness of optical localized states to the realm of phase information processing in coherent optical communication networks [17][18][19] .…”

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confidence: 99%

Topological solitons as addressable phase bits in a driven laser

et al. 2015

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Optical localized states are usually defined as self-localized bistable packets of light, which exist as independently controllable optical intensity pulses either in the longitudinal or transverse dimension of nonlinear optical systems. Here we demonstrate experimentally and analytically the existence of longitudinal localized states that exist fundamentally in the phase of laser light. These robust and versatile phase bits can be individually nucleated and canceled in an injection-locked semiconductor laser operated in a neuron-like excitable regime and submitted to delayed feedback. The demonstration of their control opens the way to their use as phase information units in next-generation coherent communication systems. We analyse our observations in terms of a generic model, which confirms the topological nature of the phase bits and discloses their formal but profound analogy with Sine-Gordon solitons.

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confidence: 99%

Topological solitons as addressable phase bits in a driven laser

et al. 2015

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“…The orthogonal vectors, x and y, express the pump polarizations which do not need to be linearly polarized. Equation (1) indicates that the output degenerate wave can be expressed as the sum of two waves with two different polarizations which carry the I/Q information of the input signal. Therefore, we can obtain the I and the Q components of the input signal with a polarizer aligned to the polarizations defined by…”

Section: Principle Of Operationmentioning

confidence: 99%

“…Due to this, research on schemes which perform all-optical signal processing of advanced modulation formats has also attracted much attention. There have been different demonstrations which covered different applications and modulation formats such as phase and amplitude regeneration of quadrature-phase-shift keying (QPSK) [1] and 8-QAM [2] signals and compensation of non-linear-transmission distortions of QPSK [3] and 16-QAM [4] signals.…”

Section: Introductionmentioning

confidence: 99%

Quadrature demultiplexing using a degenerate vector parametric amplifier

et al. 2014

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Abstract:We report on quadrature demultiplexing of a quadrature phase-shift keying (QPSK) signal into two cross-polarized binary phaseshift keying (BPSK) signals with negligible penalty at bit-error rate (BER) equal to 10 −9 . The all-optical quadrature demultiplexing is achieved using a degenerate vector parametric amplifier operating in phase-insensitive mode. We also propose and demonstrate the use of a novel and simple phase-locked loop (PLL) scheme based on detecting the envelope of one of the signals after demultiplexing in order to achieve stable quadrature decomposition.

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“…Low noise in-line amplifiers would offer significant link performance improvement. Moreover, such phase-sensitive amplifiers may open up new opportunities for all-optical regeneration of coherent optical signal [9,[13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Simple geometric interpretation of signal evolution in phase-sensitive fibre optic parametric amplifier

Redyuk¹,

Bednyakova²,

Медведев³

et al. 2017

Opt. Express

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Visualisation of complex nonlinear equation solutions is a useful analysis tool for various scientific and engineering applications. We have re-examined geometrical interpretation of the classical nonlinear four-wave mixing equations for the specific scheme of a phase sensitive one-pump fiber optical parametric amplification, which has recently attracted revived interest in the optical communications due to potential low noise properties of such amplifiers. Analysis of the phase portraits of the corresponding dynamical systems provide valuable additional insight into field dynamics and properties of the amplifiers. Simple geometric approach has been proposed to describe evolution of the waves, involved in phase-sensitive fiber optical parametric amplification (PS-FOPA) process, using a Hamiltonian structure of the governing equations. We have demonstrated how the proposed approach can be applied to the optimization problems arising in the design of the specific PS-FOPA scheme. The method considered here is rather general and can be used in various applications.

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Multilevel quantization of optical phase in a novel coherent parametric mixer architecture

Cited by 154 publications

References 29 publications

Topological solitons as addressable phase bits in a driven laser

Topological solitons as addressable phase bits in a driven laser

Quadrature demultiplexing using a degenerate vector parametric amplifier

Simple geometric interpretation of signal evolution in phase-sensitive fibre optic parametric amplifier

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