Record 11 dB phase sensitive amplification in sub-millimeter silicon waveguides

Zhang, Y.; Husko, Chad; Schröder, Jochen; Lefrançois, Simon; Rey, Isabella H.; Krauss, Thomas F.; Eggleton, Benjamin J.

doi:10.1109/cleopr.2013.6600636

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…This does not occur in the pump-degenerate case, as the parasitic FWM is small compared to that in the pump-degenerate case as mentioned before. For PSA in silicon, the maximum gain and minimum gain are both less than zero because the TPA and free carriers limit the nonlinear phase shift and thus reduce both the maximum and minimum gain [21].…”

Section: Power and Bandwidth-dependent Psamentioning

confidence: 98%

“…Recently, chalcogenide (As 2 S 3 ) waveguides have attracted considerable interest as a promising route to realize on-chip all-optical signal processing due to their integrable dimensions and high intrinsic nonlinearity [20]. Compared to silicon, where two-photon absorption (TPA) and free carriers inherently limit the nonlinear phase shift [21], chalcogenide glasses have low nonlinear loss due to TPA. Waveguides are also suitable for dispersion engineering, allowing controllable broadband phase-matching [20,22].…”

Section: Introductionmentioning

confidence: 99%

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Pump-degenerate phase-sensitive amplification in chalcogenide waveguides

et al. 2014

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We experimentally demonstrate phase-sensitive amplification based on pump-degenerate four-wave mixing in dispersion-engineered chalcogenide waveguides. We achieve a maximum extinction ratio of 18 dB with a pump peak power of 6.7 W. The variation of the gain as a function of relative phase, pump power, and bandwidth is theoretically analyzed and experimentally studied. Additionally, an analytical formula relating the phase-transfer curve to the experimental gain curve is derived. Numerical calculations show strong agreement with the experimental results.

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Section: Power and Bandwidth-dependent Psamentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Pump-degenerate phase-sensitive amplification in chalcogenide waveguides

et al. 2014

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“…PSAs have been demonstrated in materials with second-order nonlinearity in periodically poled Lithium Niobate and with third-order nonlinearity in a highly nonlinear fibre (HNLF), semiconductor optical amplifiers and silicon and chalcogenide waveguide (2,3,(12)(13)(14)(15)(16). Among these media, realization of PSA in HNLF is notably interesting for practical network applications due to its low loss, long interaction length for nonlinear amplification, highpower efficiency and ease of system integration (6,7,(17)(18)(19).…”

Section: Introductionmentioning

confidence: 99%

A novel scheme of cascaded four-wave mixing for phase-sensitive amplification in nonlinear optical fibre

Anchal

Krishnamurthy

Landais

2018

Journal of Modern Optics

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We propose and numerically verify a scheme of phase-sensitive amplifier (PSA) using four-wave mixing (FWM) in cascaded highly nonlinear fibres (HNLFs), without requiring initial phase-locking between signal and pump. The first HNLF is used to generate two phase-conjugate waves, which act as two pumps for FWM process in second HNLF. We feed the two pumps from opposite ends of second HNLF and a signal co-propagating with one of the pumps. We keep the signal frequency in the middle of two pump frequencies to obtain phase-conjugate wave at the same frequency as the signal by FWM process in second HNLF. Signal and phase-conjugate wave appear at opposite ends of the second HNLF and combined to obtain PSA. The frequency-shift-free operation of phase conjugation helps in preserving the frequency of input signal during phase-sensitive amplification. We derive the expression for PSA signal output and PSA gain and show analytically that PSA gain depends upon signal phase only, as the two pumps are phase conjugate to each other. Thus, eliminating the need of phase locking between signal and pump waves. We show that PSA provides high gain for in-phase component and almost cancellation for quadrature-phase component of signal. We show the broadband nature of PSA due to minimum effect of group velocity and group velocity dispersion owing to counter-propagating nature of signal and conjugate waves. We study the performance of PSA under the effects of pumpsignal detuning, amplifier length and input signal phase. Simulation results show that PSA output is forced to attain 0 or π phase regardless of large variation of phase in the input signal. Nonlinear phase noise reduction of 100 Gbps DPSK signal transmitted over 1000-km standard single-mode fibre confirms phase regeneration by PSA.

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“…Phase-sensitive amplification (PSA) has been investigated extensively in recent years in view of its potential to achieve noiseless amplification and non-classical squeezed states generation 1 . Relying on the nonlinear interactions, PSA can take place in both χ (2) materials such as periodically-poled lithium niobate waveguides 2 and χ (3) materials such as highly nonlinear fibres 3 4 (HNLFs) and dispersion engineered nonlinear waveguides 5 6 . Due to its ability to selectively amplify input optical signals at certain phases, PSA has been considered for various applications in optical communications, including low-noise amplification 7 , regeneration 4 , format conversion 8 of phase-encoded signals, as well as optical signal-to-noise ratio (OSNR) improvement 9 .…”

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confidence: 99%

Raman-Enhanced Phase-Sensitive Fibre Optical Parametric Amplifier

Guo

Shu

2016

Sci Rep

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Phase-sensitive amplification is of great research interest owing to its potential in noiseless amplification. One key feature in a phase-sensitive amplifier is the gain extinction ratio defined as the ratio of the maximum to the minimum gains. It quantifies the capability of the amplifier in performing low-noise amplification for high phase-sensitive gain. Considering a phase-sensitive fibre optical parametric amplifier for linear amplification, the gain extinction ratio increases with the phase-insensitive parametric gain achieved from the same pump. In this work, we use backward Raman amplification to increase the phase-insensitive parametric gain, which in turn improves the phase-sensitive operation. Using a 955 mW Raman pump, the gain extinction ratio is increased by 9.2 dB. The improvement in the maximum phase-sensitive gain is 18.7 dB. This scheme can significantly boost the performance of phase-sensitive amplification in a spectral range where the parametric pump is not sufficiently strong but broadband Raman amplification is available.

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Record 11 dB phase sensitive amplification in sub-millimeter silicon waveguides

Cited by 5 publications

References 11 publications

Pump-degenerate phase-sensitive amplification in chalcogenide waveguides

Pump-degenerate phase-sensitive amplification in chalcogenide waveguides

A novel scheme of cascaded four-wave mixing for phase-sensitive amplification in nonlinear optical fibre

Raman-Enhanced Phase-Sensitive Fibre Optical Parametric Amplifier

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