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University of Southampton makes 37 core hollow photonic bandgap fiber
Release time:
2013-06-20
British scientists claim that a new record of 73.7 Tbit/s transmission rate has been created using a 37-core hollow photonic bandgap fiber (HC-PBGF) based on mode multiplexing. Yongmin Jung, a senior researcher at the Optoelectronics Research Centre at the University of Southampton, and colleagues have created the world's first low-loss broadband 37-core HC-PBGF with no internal surface modes and low crosstalk.
British scientists claim that a new record of 73.7 Tbit/s transmission rate has been created using a 37-core hollow photonic bandgap fiber (HC-PBGF) based on mode multiplexing. Yongmin Jung, a senior researcher at the Optoelectronics Research Center at the University of Southampton, and his colleagues have created the world's first low-loss broadband 37-core HC-PBGF with no surface modes and low crosstalk inside. The results of the study have been submitted for presentation at the Optical Fiber Communication Expo and National Optical Fiber Engineering Conference (March 17-21, Anaheim, California, USA).
The 37-core hollow fiber, based on the 19-core hollow fiber, further weakens the main loss mechanism inside such fibers-surface scattering. The research team produced a fiber with a diameter of 37 μm, a cladding spacing of 4.4 μm, and a relative aperture of 0.97, which can obtain a wide band gap of about 300nm. This fiber has a low minimum fundamental mode loss of 3.3 dB/km at a wavelength of 1550nm and a wide 3-dB bandwidth of about 85nm in the C- band. The lattice structure of the HC-PBGF is special-the larger air core is surrounded by honeycomb pores. Because the signal propagates in the air, the data transmission rate is much higher than that of traditional optical fiber.
The lattice structure of the HC-PBGF is special-the larger air core is surrounded by honeycomb pores. Because the signal propagates in the air, the data transmission rate is much higher than that of traditional optical fiber. In addition, the transmission method is via the photonic bandgap effect, rather than total internal reflection in conventional optical fibers. Although, compared with solid optical fiber, HC-PBGF has lower nonlinearity, lower loss and lower delay potential, but there are still some problems to be studied, especially related to the use of multiple input multiple output technology at the receiving end of the processing mode.
Currently, researchers are investigating various applications of this new fiber, such as communications, nonlinear pulse shaping and saturable absorption, distributed feedback lasers, high-power fiber lasers and plasmon sensors.
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