Laguerre-Gaussian mode division multiplexing in multimode fiber using SLMs in VCSEL arrays

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.

Free-space optics mode-wavelength division multiplexing system using LG modes based on decision feedback equalization

“…Therefore, enhancing the capacity of FSO is necessary for high-speed transfer of a large amount of data. Currently, numerous techniques such as wavelength division multiplexing (WDM) [7], time division multiplexing (TDM) [8], and orthogonal frequency division multiplexing (OFDM) [9] have been employed in enhancing data transmission capacity in FSO systems.…”

“…An emerging multiplexing scheme, known as mode division multiplexing (MDM), has been used to transport independent channels simultaneously using eigenmodes [10]. In MDM, eigenmodes are used in MDM to drive the propagation of a number of channels on different modes generated by various mechanisms such as photonic crystal fibers [11], optical signal processing [12,13], few mode fiber [9,14], modal decomposition methods [15,16], laser designs [17,18] and spatial light modulators [19,20]. MDM has been used for switching [21] and for multiplexing [10] in FSO systems.…”

32 channel DQPSK DWDM-PON for local area network using dispersion compensation fiber

“…The media communications industry is hustling to support optical channel rates in dense wavelength multiplexing (DWDM) product and services to 40Gbps and more [1][2][3][4]. Legacy infrastructure in Local Area Networks (LANs) has faced genuine difficulties in pleasing to popular cloud infrastructures and the expansion in data traffic due to diverse services such as, triple play services applications which involves video, audio, data and many more bandwidth-intensive applications [4][5][6][7].…”

“…Legacy infrastructure in Local Area Networks (LANs) has faced genuine difficulties in pleasing to popular cloud infrastructures and the expansion in data traffic due to diverse services such as, triple play services applications which involves video, audio, data and many more bandwidth-intensive applications [4][5][6][7]. Capacity-limited routers in LAN will benefit essentially from the expansion to 100Gbps.…”

Multidiameter optical ring and Hermite–Gaussian vortices for wavelength division multiplexing–mode division multiplexing

“…[2][3][4] MDM has spurred innovative techniques for generating various optical vortices for compensating for degenerate mode group (DMG) dispersion and mode coupling, which restrict the coherence length of DMGs in few-mode fiber and MMF. [5][6][7][8][9][10][11] Spatial light modulators (SLMs) have been used for holographic shaping of the wavefront to different linearly polarized modes or orbital angular momentum (OAM) modes externally [12][13][14][15] or within the laser cavity. 16,17 A coherent superposition of optical vortex modes can be used to create multimoded signals.…”