Highly efficient multichannel wavelength conversion of DPSK signals

Devgan, P.; Tang, Rongnian; Grigoryan, V.S.; Kumar, Prem

doi:10.1109/jlt.2006.882244

Cited by 54 publications

(25 citation statements)

References 16 publications

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“…Some processing applications that have already been demonstrated include wavelength conversion [1][2][3][4][5][6][7], phase regeneration [8][9][10][11][12][13], electric field decomposition of phase shift keying (PSK) signals [14][15][16] and analogue-to-digital conversion (ADC) [17]. Single-and dual-pump configurations with the signal, idler and pump(s) being aligned either along the same polarization axis (scalar schemes) or on different polarization axes (vector schemes) and either non-degenerate or degenerate configurations (with the signal and idler being at either different or the same frequency, respectively) have been demonstrated [8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Polarization-Assisted Phase-Sensitive Processor

Parmigiani

Hesketh

Slavı́k

et al. 2015

J. Lightwave Technol.

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Abstract-We propose and experimentally demonstrate a phase sensitive optical processor, capable of generating two co-directional and phase shifted phase sensitive amplifiers (PSAs) in a single device. Phase-sensitive operation is obtained by polarization mixing a phase-locked signal/idler pair generated in a degenerate dual-pump vector parametric amplifier based on four-wave mixing (FWM) in a highly nonlinear fiber (HNLF). We refer to this configuration as a polarization assisted PSA (PA-PSA) and demonstrate some of the applications that it may find. Firstly, we experimentally demonstrate the regeneration of a binary phase shift keying (BPSK) signal in a system that requires only a very low nonlinear phase shift (NPS) of 0.35 rad. Secondly, we decompose a quadrature phase shift keying (QPSK) signal into its in-phase and quadrature components. Whilst application to a QPSK signal is shown in our demonstration we demonstrate numerically that any complex modulation format signal can be decomposed using this approach. Finally, we use our processor to regenerate QPSK signals in a single non-linear device.Index Terms-Four wave mixing, nonlinear optics, phase sensitive amplifiers. I. INTRODUCTIONBoth phase insensitive and phase sensitive (PS) FWM schemes are often used as the basis for achieving optical processing of spectrally efficient modulation formats, which utilize both the phase and amplitude of the optical carrier. Some processing applications that have already been demonstrated include wavelength conversion [1][2][3][4][5][6][7], phase regeneration [8][9][10][11][12][13], electric field decomposition of phase shift keying (PSK) signals [14][15][16] and analogue-to-digital conversion (ADC) [17]. Single-and dual-pump configurations with the signal, idler and pump(s) being aligned either along the same polarization axis (scalar schemes) or on different polarization axes (vector schemes) and either non-degenerate or degenerate configurations (with the signal and idler being at either different or the same frequency, respectively) have been demonstrated [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In many of the applications above, for example, both PSA-based regeneration of BPSK signals and electric field decomposition of, in principle, any advanced modulation format require an ideal binary step-like phase response. This is usually achieved by generating a complex conjugate copy (idler) of the signal through PS-FWM, and coherently adding the two together. The relative strength of the two waves determines the phase sensitive extinction ratio, PSER (defined as the difference between the maximum PS gain and the maximum PS de-amplification), and in turn the steepness of the steps in the phase response. For an ideal steplike response, the two components should have identical power [8][9]. Indeed, to generate phase conjugated copies of similar signal strength a large non-linear interaction is needed, requiring for example, Watt-level pump powers in a HNLF.It would be more energy-and cost-efficient, however, ...

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Section: Introductionmentioning

confidence: 99%

Polarization-Assisted Phase-Sensitive Processor

Parmigiani

Hesketh

Slavı́k

et al. 2015

J. Lightwave Technol.

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“…A high-capacity field transmission experiment using multi-wavelength conversion has also been demonstrated [11]. Moreover, the parametric process is fully transparent to various types of advanced modulation formats such as DPSK [12] and QPSK [13]. These studies show that guard bands can be provided with a suitable channel spacing.…”

Section: Introductionmentioning

confidence: 94%

Mathematical Model for Dynamic Pump-Wavelength Selection Switch

Kitsuwan¹,

Siswanto²,

Oki³

2015

OJOp

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This paper presents a mathematical model based on dynamic pump-wavelength selection for an optical packet switch (OPS). In the OPS, multiple packets that carry the same wavelength from different input ports could be addressed to the same output port at the same time slot. This condition is called wavelength contention. Of those contended packets, only one is forwarded to the output fiber while the others are dropped. Parametric wavelength conversion is used to convert the contended wavelengths into available non-contending wavelengths. The OPS based on the dynamic pump-wavelength selection scheme, where the pump-wavelengths are adjusted based on the requests in every time slot, uses a heuristic matching algorithm to minimize the number of packet losses. However, there is no guarantee that the heuristic algorithm outputs the optimum result. The mathematical model presented in this paper is used to confirm the performance of the heuristic matching algorithm for the DPS-based OPS. A simulation shows that the heuristic matching algorithm achieves the same performance as the optimum solution provided by the mathematical model.

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“…There are many methods to implement alloptical spectral inversion, such as cross-gain modulation [11], cross-phase modulation [12][13][14] and four-wave mixing (FWM) [15,16], among which FWM in fibers is regarded as a promising one due to its numerous advantages, e.g. high speed, low noise, easy to be integrated, broad bandwidth [17].…”

Section: Introductionmentioning

confidence: 99%

Compensating power depletion due to stimulated Raman scattering in high-power delivery fiber via spectral inversion revisited in a view of experimental implementation

Dong¹

2018

JAP

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Corresponding to: dongpeng@upc.edu.cn ABSTRACTBroadband spectral inversion was proved theoretically to be an effective method to compensate power depletion due to stimulated Raman scattering in high-power delivery fiber. A critical difficulty in implementing the method in experiment is to realize broadband spectral inversion of incoherent light as Raman Stokes waves are incoherent due to their origin from spontaneous emission noise. Broadband spectral inversion of incoherent light is investigated experimentally in this article. A beam from an amplified spontaneous emission (ASE) light source is used as an approximated Raman Stokes waves in the experiment. ASE Spectrum of width of 10.5nm is inverted via four-wave mixing in a highly nonlinear dispersion-shifted fiber in efficiency of -10dB without significant spectrum deformation. A theoretical model for four-wave mixing of ASE incoherent light is established, and based on which the limitation in more broadband spectral inversion of ASE incoherent light is analyzed.

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Highly efficient multichannel wavelength conversion of DPSK signals

Cited by 54 publications

References 16 publications

Polarization-Assisted Phase-Sensitive Processor

Polarization-Assisted Phase-Sensitive Processor

Mathematical Model for Dynamic Pump-Wavelength Selection Switch

Compensating power depletion due to stimulated Raman scattering in high-power delivery fiber via spectral inversion revisited in a view of experimental implementation

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