Amplified O-band direct-detection transmission using bismuth-doped fiber amplifiers

Yang Hong; Kyle R. H. Bottrill; Natsupa Taengnoi; Naresh K. Thipparapu; Yu Wang; Jayanta K. Sahu; David J. Richardson; Periklis Petropoulos

doi:10.1117/12.2606135

1 November 2021 Amplified O-band direct-detection transmission using bismuth-doped fiber amplifiers

Yang Hong, Kyle R. H. Bottrill, Natsupa Taengnoi, Naresh K. Thipparapu, Yu Wang, Jayanta K. Sahu, David J. Richardson, Periklis Petropoulos

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Proceedings Volume 12057, Twelfth International Conference on Information Optics and Photonics; 120572Y (2021) https://doi.org/10.1117/12.2606135
Event: Twelfth International Conference on Information Optics and Photonics, 2021, Xi'an, China

Abstract

The recent emergence of bismuth-doped fiber amplifiers (BDFAs) enables the reach extension of high-speed O-band communication links. In this work, our recent efforts on amplified O-band direct-detection (DD) transmission using BDFAs are reviewed. We first present the performance of a four-channel O-band coarse wavelength-division multiplexed (CWDM) transmission over 50-km length of single-mode fiber (SMF), showing that the chromatic dispersion (CD) which has long been neglected in O-band transmission, will degrade the transmission performance of dispersive O-band channels. In this context, we quantify the relative benefits of different DD formats at 50 Gb/s over up to 70-km length of SMF in a BDFA pre-amplified O-band system. The considered formats include Nyquist on-off keying (OOK), Nyquist 4-ary pulse amplitude modulation (PAM4), and Kramers–Kronig (KK) detection assisted subcarrier modulation using quadrature phase-shift keying (QPSK), and they are evaluated over both the low CD 1320-nm wavelength and the more dispersive 1360-nm wavelength. It is demonstrated that OOK exhibits the best receiver sensitivity over all distances up to 70 km at the 1320-nm channel, whereas KK-QPSK achieves the optimal transmission performance at the 1360-nm wavelength when the reach is extended beyond 50 km. We consider that our results provide useful insights into possible future implementations of longer-reach O-band WDM systems.

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Yang Hong, Kyle R. H. Bottrill, Natsupa Taengnoi, Naresh K. Thipparapu, Yu Wang, Jayanta K. Sahu, David J. Richardson, and Periklis Petropoulos "Amplified O-band direct-detection transmission using bismuth-doped fiber amplifiers", Proc. SPIE 12057, Twelfth International Conference on Information Optics and Photonics, 120572Y (1 November 2021); https://doi.org/10.1117/12.2606135

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KEYWORDS

Fiber amplifiers

Optical amplifiers

Coarse wavelength division multiplexing

Double sideband modulation

Modulation

Single sideband modulation

Semiconductor optical amplifiers

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