Emerging near‐infrared luminescent materials for next‐generation broadband optical communications
Beibei Xu,
Chaoyuan Jin,
Jae‐Seong Park
et al.
Abstract:The rapid development of emerging technologies observed in recent years, such as artificial intelligence, machine learning, mobile internet, big data, cloud computing, and the Internet of Everything, are generating escalating demands for expanding the capacity density, and speed in next‐generation optical communications. This poses a significant challenge to existing communication techniques. Within this context, the integration of near‐infrared broadband, tunable, and high‐gain luminescent materials into sili… Show more
This research focuses on the gain measurement and modeling of optical silica-germanium glass doped by erbium and bismuth activators to implement a two-band planar optical amplification. Using two activators, bismuth active centers with germanium (BAC-Ge) expand the amplification of the near-infrared bandwidth up to 1650 nm, where the optical attenuation of telecommunication fibers is less than 0.3 dB/km. We described the amplification mechanism based on the luminescence spectral response of the activators. We determined the differential amplification gain of the fabricated active glasses using a pulse measurement method and the calculation of the authentic model using waveguide propagation equations. A single source with a wavelength of 1480 nm was used for pumping in both optical bands. The emission and absorption cross-section coefficients were determined from the luminescence spectrum of the glasses by the Füchtbauer-Ladenburg equation with a Gaussian approximation and McCumber's theory. The calculated differential gain values are in good agreement with the measurement results. Our research leads to the conclusion that BAC-Ge optical activity is conditioned by the location of Bi atoms in the germano-silicate glass matrix with high GeO2 content.
This research focuses on the gain measurement and modeling of optical silica-germanium glass doped by erbium and bismuth activators to implement a two-band planar optical amplification. Using two activators, bismuth active centers with germanium (BAC-Ge) expand the amplification of the near-infrared bandwidth up to 1650 nm, where the optical attenuation of telecommunication fibers is less than 0.3 dB/km. We described the amplification mechanism based on the luminescence spectral response of the activators. We determined the differential amplification gain of the fabricated active glasses using a pulse measurement method and the calculation of the authentic model using waveguide propagation equations. A single source with a wavelength of 1480 nm was used for pumping in both optical bands. The emission and absorption cross-section coefficients were determined from the luminescence spectrum of the glasses by the Füchtbauer-Ladenburg equation with a Gaussian approximation and McCumber's theory. The calculated differential gain values are in good agreement with the measurement results. Our research leads to the conclusion that BAC-Ge optical activity is conditioned by the location of Bi atoms in the germano-silicate glass matrix with high GeO2 content.
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