Abstract
Mode division multiplexing (MDM) is a promising technology for increasing the aggregate bandwidth of multimode fiber (MMF) in conjunction with wavelength division multiplexing (WDM) in face of the impending capacity crunch in optical fiber networks. This paper investigates the effect of radial and azimuthal mode spacings in a 25-channel MDM-WDM system in MMF using a spatial light modulator-controlled VCSEL array for excitation of Laguerre-Gaussian (LG) modes. A data rate of 25Gbps is achieved at a central wavelength of 1550.12 nm. The effects of different azimuthal and radial mode spacings of LG modes are analyzed in terms of the channel impulse response, eye diagram and bit-error rate.
Highlights
The escalation of network traffic from the profusion of data centers and other cloud computing architectures have catalyzed numerous multiplexing technologies for enhancing the capacity of optical fiber networks and optimizing the optical spectrum
A recent technology for enabling Tb/s optical communications is mode division multiplexing (MDM), which leverages fiber modes as information carriers [1]
Contribution As an extension to spatial light modulators (SLMs)-based MDM techniques above, this paper presents for the first time a numerical model of MDM of Laguerre-Gaussian (LG) modes in multimode fiber (MMF) using integrated SLM-controlled vertical-cavity surface-emitting laser (VCSEL) arrays
Summary
The escalation of network traffic from the profusion of data centers and other cloud computing architectures have catalyzed numerous multiplexing technologies for enhancing the capacity of optical fiber networks and optimizing the optical spectrum. A recent technology for enabling Tb/s optical communications is mode division multiplexing (MDM), which leverages fiber modes as information carriers [1]. The potential of MDM lies in its prowess to break the nonlinear Shannon limit of conventional single-moded optical fiber transmission [2]. In MDM, specific mode or mode groups are used to transmit independent data signals in an optical fiber [3]. By controlling the excitation of modes, the impulse response of each channel may be optimized
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