Polarization Insensitive Fiber Optic Parametric Amplifier with a Gain Bandwidth of 22 nm in S-Band

Gaur, Chandra B.; Gordienko, Vladimir; Hazarika, Pratim; Doran, Nick

doi:10.1364/ofc.2022.w4j.1

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…For example, periodically poled LiNbO3 (PPLN) waveguides or highly nonlinear fibers (HNLFs) used as amplification media have obtained the wide gain bandwidth of >10 THz [5,6]. In addition, by customizing the phase-matching characteristics of the amplification medium and pump allocation, the amplification band can be applied to various telecommunication bands [7,8]. Especially, as the PPLN-based OPA produces relatively few unwanted nonlinear optical effects among WDM channels, it is suitable for amplifying a wideband WDM signal with a high gain.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gain Saturation on Wideband WDM Signal in PPLN-Based Optical Parametric Amplifier

Shimizu

Kobayashi

Kazama

et al. 2023

J. Lightwave Technol.

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The periodically poled LiNbO3 (PPLN) based optical parametric amplifier (OPA) is a technology that contributes to the construction of multi-band wavelength-division multiplexing (WDM) optical networks thanks to its wide amplification bandwidth and wavelength conversion function. In addition, the fast response of the OPA means it is unaffected by sudden changes of wavelength channels due to dynamic channel add-drop. However, such fast response leads to nonlinear signal distortion when operating in the gain saturation region. This paper experimentally investigates the conversion of gain saturation into the nonlinear amplitude distortion in a 64-Gbaud 64QAM WDM signal. We characterized the input power tolerance of a PPLNbased OPA in wideband WDM applications and found that the nonlinear amplitude distortion can be suppressed by increasing the number of WDM channels. For a 75-GHz-spacing 64-channel WDM configuration, the total input power tolerance was improved by ~10 dB compared to a single-channel case. We also confirmed that there is almost no wavelength dependence of the effect of gain saturation on the signal distortion. These results show that PPLN-based OPAs have a wide total input power range for amplifying wideband WDM signals in terms of the nonlinear distortion.

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Section: Introductionmentioning

confidence: 99%

Effect of Gain Saturation on Wideband WDM Signal in PPLN-Based Optical Parametric Amplifier

Shimizu

Kobayashi

Kazama

et al. 2023

J. Lightwave Technol.

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“…The right plot at Fig. 2 shows the PI-FOPA net gain and PDG when PI-FOPA is configured for operation in the S-band [13]. Net gain >10 dB and PDG <1 dB are observed across the range of 22 nm.…”

Section: Figure 2 Pi-fopa Net Gain and Polarisation Dependent Gain (P...mentioning

confidence: 99%

Fibre Optical Parametric Amplifiers for Communications

Gordienko

Gaur

Bessin

et al. 2023

2023 23rd International Conference on Transparent Optical Networks (ICTON)

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We present our recent achievements with polarisation-insensitive fibre optical parametric amplifiers (PI-FOPAs) for optical communications. We have demonstrated a robust fully automated (black-box) PI-FOPA operation in the C and L bands simultaneously with gain of ~20dB and output power over 23dBm when amplifying polarisation-multiplexed WDM QAM signals and a bursty traffic. Additionally, we have demonstrated a PI-FOPA to amplify WDM signals in the S band and across a continuous bandwidth of 40nm. Finally, we have demonstrated a power budget improvement of a transient-sensitive link by up to 8 dB when employing a PI-FOPA with noise figure of ~6 dB as a drop-in replacement of an EDFA.

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“…The optical parametric amplifier (OPA) has attracted attention for constructing wideband WDM systems because of its wide-gain bandwidth [19][20][21]. In addition, as with the Raman amplifier, the gain band can be shifted to various telecommunication bands by designing a phase matching for media and pump-frequency allocation [22][23][24]. There are two types of OPAs; one utilizes χ (3) -nonlinear media (e.g., highly nonlinear fiber) [20,21], and the other utilizes χ (2) -nonlinear media.…”

Section: Introductionmentioning

confidence: 99%

L- and U-Band WDM Transmission Over 6 THz Using PPLN-Based Optical Parametric Amplification and Wavelength-Band Conversion

Shimizu,

Kobayashi,

Kawai

et al. 2024

J. Lightwave Technol.

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We demonstrate a 38.4-Tbps (60 ch. × 640 Gbps) wavelength-division multiplexing (WDM) transmission across 5 × 80-km G.654.E single-mode fibers over 6 THz within L-and U-bands. The U-band (1625-1675 nm) is promising as a next transmission band for multiband networks because of its low transmission loss compared with E-and O-bands, but there are few demonstrations of coherent WDM transmission with the U-band. One reason is that promising optical components, especially for optical transceivers, are underdeveloped for the U-band. An optical parametric amplifier (OPA) using a periodically poled LiNbO3 (PPLN) waveguide has wide-gain bandwidth and wavelength conversion function, which allows the use of commercially available optical components for new bands. We achieve L-and U-band digital coherent WDM transmission within 1597.2-1649.9 nm (181.7-187.7 THz) using PPLN-based optical parametric inline amplification and wavelength-band conversion.

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Polarization Insensitive Fiber Optic Parametric Amplifier with a Gain Bandwidth of 22 nm in S-Band

Abstract: We demonstrate a polarization insensitive fiber optic parametric amplifier to provide net gain >10dB and polarization dependent gain <1dB for up to 19 WDM channels in the range 1508– 1530nm. © 2022 The Author(s)

Cited by 7 publications

References 7 publications

Effect of Gain Saturation on Wideband WDM Signal in PPLN-Based Optical Parametric Amplifier

Effect of Gain Saturation on Wideband WDM Signal in PPLN-Based Optical Parametric Amplifier

Fibre Optical Parametric Amplifiers for Communications

L- and U-Band WDM Transmission Over 6 THz Using PPLN-Based Optical Parametric Amplification and Wavelength-Band Conversion

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