400GBASE-LR4 Transmission Over Field-Deployed Fibre Link Supported by Bismuth-Doped Fibre Amplifier

Wakayama, Yuta; Mikhailov, V.; Elson, Daniel J.; Maneekut, Rachata; Luo, Jiawei; Wang, Cen; Balasis, Filippos; Yoshikane, Noboru; Inniss, Daryl; Tsuritani, Takehiro

doi:10.1109/ecoc52684.2021.9606147

Cited by 10 publications

(6 citation statements)

References 3 publications

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“…By optimizing the process conditions of BDFs and selection of optical components, different operating wavelengths range in O‐band can be achieved. Using a single pump laser below 1200 nm, BDFA that covers 1271–1331 nm has been demonstrated in the field 53 . Using a slightly different BDF and 1270 nm pump laser, BDFA can cover 1320–1360 nm 54 .…”

Section: Glass Chemistry's Impact On the Designs Of Bdfasmentioning

confidence: 99%

“…Using a single pump laser below 1200 nm, BDFA that covers 1271-1331 nm has been demonstrated in the field. 53 Using a slightly different BDF and 1270 nm pump laser, BDFA can cover 1320-1360 nm. 54 By adding a 1240 nm pump in this BDFA, more BACs with emission at shorter wavelength can be activated, which makes the gain across the bandwidth more uniform.…”

Section: Glass Chemistry's Impact On the Designs Of Bdfasmentioning

confidence: 99%

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Review of bismuth‐doped fibers used in O‐band optical amplifiers‐scientific challenges and outlook

Luo¹,

Mikhailov²,

Windeler³

et al. 2023

Int J of Appl Glass Sci

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Bismuth-doped phosphosilicate fibers have become the most promising gain medium for O-band amplifiers. Yet scientific challenges on understanding the nature of bismuth active centers (BACs), mechanisms of bismuth cluster formation in the phosphosilicate glass network still exist. It is likely that multiple BACs with different oxidation states in different structural sites all contribute to the broad, nonsymmetric luminescence and gain spectra. Due to the progress in the fundamental understanding of bismuth-doped phosphosilicate glass, various designs of optical amplifiers with decent performances have been demonstrated.

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Section: Glass Chemistry's Impact On the Designs Of Bdfasmentioning

confidence: 99%

Section: Glass Chemistry's Impact On the Designs Of Bdfasmentioning

confidence: 99%

Review of bismuth‐doped fibers used in O‐band optical amplifiers‐scientific challenges and outlook

Luo¹,

Mikhailov²,

Windeler³

et al. 2023

Int J of Appl Glass Sci

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“…The OA has the noise figure (NF) of 6 dB and the amplification gain of 15 dB at −7 dBm of input power. The gain reaches 17.5 dB for small input power below −20 dBm [32]. After the fiber transmission, the equalization, which consists of 11-taps T/2 spaced FFE, and 3-taps DFE with the least-mean square (LMS) algorithm, are added to the DSP chain at the receiver side to compensate ISI effects caused by CD.…”

Section: O-band Multi-span Fiber Simulation With Inline Optical Ampli...mentioning

confidence: 99%

“…A high fiber attenuation in O-band, compared to C-band, is another issue that limits the system reach. Hence, the optical amplifiers (OA) are vital elements to compensate fiber loss as well as device insertion loss [29]- [32]. Besides, a semiconductor optical amplifier (SOA) provides photonic integrated circuits with less power consumption but the system may suffer from self/cross gain modulation that causes SOA not to be preferable for IM/DD [6], [29].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a Bismuth-doped fiber amplifier (BDFA) is an attractive type of doped fiber amplifier for O-band due to its ultra-wide 6-dB amplification bandwidth over 80 nm [31]. Demonstrations of using BDFA as a booster/pre-amplifier to extend the reach of a 25 GBaud Nyquist PAM-4 signal and 400GBASE-LR-4/8, have been successfully reported in [29], [31]- [32]. As a result, these studies also show the possibility of introducing a multispan high-speed IM/DD system using OA as in-line amplifiers to increase the distance of DCI.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-Low Crosstalk En/Decoder Using an Amplitude-Shaping Technique for 100 Gbps/λ OCDM-PAM-4 Transmission in O-Band

Maneekut

Kaewplung

2022

IEEE Access

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This paper proposes an optimized 16-chip multi-level phase-shifted optical code division multiplexing (OCDM) en/decoder for 4-level pulse amplitude modulation (PAM-4) format by using an amplitude-shaping (AS) technique. The optimized en/decoder can efficiently suppress the crosstalk and the primary beat noise (PBN). The code detection performance for 4-OCDM PAM-4 becomes the lowest to our knowledge. The numerical bit error rate analysis and the back-to-back simulation are shown. We also successfully demonstrate by computer simulation a 100 Gbps/λ enabling by 12.5 GBaud 4-OCDM PAM-4 transmission in O-band over 6×30 km with in-line optical amplifiers.INDEX TERMS Amplitude shaping, optical amplifier, o-band transmission, optical code division multiplexing, pulse amplitude modulation

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Reach Extension of a 53.12 Gbps PAM-4 IM/DD Signals With Optimized Extinction Ratio in Amplified Multi-Span O-Band Transmission

Maneekut,

Elson,

Wakayama

et al. 2024

IEEE Access

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This paper explores, through the utilization of analytical models and simulations, the bit error rate (BER) of 400GBASE-LR8/ER8 in back-to-back configuration, considering various extinction ratio (ER) values and photodetector types. Simulation of transmission over fiber is carried out to measure chromatic dispersion (CD) penalty in each scenario. To increase the distance, we simulated a multi-span transmission with inline optical amplifiers (OAs). We mitigated the effects of CD-induced power fading by employing equalization such that the channel under test (CUT) at 1274 nm could reach 7×30 km. The effects of fiber nonlinearity were also investigated for both single-channel and 3 wavelength division multiplexing (WDM) at various channel spacings. Moreover, the relationship between ER and peak-to-average-power ratio (PAPR) at different distances was investigated. An ER optimization for a highly accumulated CD multi-span fiber link with amplification was effective in improving the BER. Finally, we successfully transmitted a 26.56 GBaud 4-level pulse amplitude modulation (PAM-4) signal up to 8×30 km with the optimal ER of 5 dB.

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400GBASE-LR4 Transmission Over Field-Deployed Fibre Link Supported by Bismuth-Doped Fibre Amplifier

Cited by 10 publications

References 3 publications

Review of bismuth‐doped fibers used in O‐band optical amplifiers‐scientific challenges and outlook

Review of bismuth‐doped fibers used in O‐band optical amplifiers‐scientific challenges and outlook

Ultra-Low Crosstalk En/Decoder Using an Amplitude-Shaping Technique for 100 Gbps/λ OCDM-PAM-4 Transmission in O-Band

Reach Extension of a 53.12 Gbps PAM-4 IM/DD Signals With Optimized Extinction Ratio in Amplified Multi-Span O-Band Transmission

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