Three-mode multiplexer in photonic crystal fibre

Yerolatsitis, Stephanos; Birks, T. A.

doi:10.1049/cp.2013.1302

Cited by 10 publications

(15 citation statements)

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“…In addition, due to the excellent autocorrelation properties of the transmitted sequences from the DACs, all transmitted channels guided into the mode-multiplexer can be considered to be independent and distinct. Several mode-multiplexing techniques have been developed that selectively excite a set of modes in few-mode fibres, such as phase plates [28][29][30] , spot launchers [31][32][33][34] and adiabatically tapered photonic lanterns [35][36][37] . In contrast to the bulky optics associated with phase plates, the latter two techniques potentially have the compactness necessary for integration into a future transponder.…”

Section: Experimental Implementationmentioning

confidence: 99%

Ultra-high-density spatial division multiplexing with a few-mode multicore fibre

et al. 2014

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Single-mode fibres with low loss and a large transmission bandwidth are a key enabler for long-haul high-speed optical communication and form the backbone of our information-driven society. However, we are on the verge of reaching the fundamental limit of single-mode fibre transmission capacity. Therefore, a new means to increase the transmission capacity of optical fibre is essential to avoid a capacity crunch. Here, by employing few-mode multicore fibre, compact three-dimensional waveguide multiplexers and energy-efficient frequency-domain multiple-input multiple-output equalization, we demonstrate the viability of spatial multiplexing to reach a data rate of 5.1 Tbit s −1 carrier −1 (net 4 Tbit s −1 carrier −1 ) on a single wavelength over a single fibre. Furthermore, by combining this approach with wavelength division multiplexing with 50 wavelength carriers on a dense 50 GHz grid, a gross transmission throughput of 255 Tbit s −1 (net 200 Tbit s −1 ) over a 1 km fibre link is achieved. W ith the persistent exponential growth in Internet-driven traffic, the backbone of our information-driven society, based on single-mode fibre (SMF) transmission, is rapidly approaching its fundamental capacity limits 1 . In the past, capacity increases in SMF transmission systems have been achieved by exploiting various dimensions, including polarization and wavelength division multiplexing, in tandem with advanced modulation formats and coherent transmission techniques 2 . However, the impending capacity crunch implies that carriers are lighting up dark fibres at an exponentially increasing rate to support societal capacity demands 3 . To alleviate the corresponding costs and increased energy requirements associated with the linear capacity scaling from using additional SMFs, spatial division multiplexing (SDM) within a single fibre can provide a solution 4,5 . By introducing an additional orthogonal multiplexing dimension, the capacity, spectral and energy efficiency, and therefore the cost per bit, can be decreased, which is vital for sustaining the business model of major network stakeholders. To fulfil the SDM promise, a new paradigm is envisaged that allows up to two orders of magnitude capacity increase with respect to SMFs 6 . SDM is achieved through multiple-input multiple-output (MIMO) transmission, employing the spatial modes of a multimode fibre (MMF) 7 , or multiple single-mode cores, as channels 8-13 . Recently, a distinct type of MMF, the few-mode fibre (FMF), has been developed to co-propagate three or six linear polarized (LP) modes 14-17 . Driven by rapid enhancements in high-speed electronics, digital signal processing (DSP) MIMO techniques can faithfully recover mixed transmission channels 18 , allowing spectral efficiency increases as spatial channels occupy the same wavelength. State-of-the-art single-carrier FMF transmission experiments have demonstrated capacity increases in a single fibre by exploiting six spatial modes, achieving 32 bit s −1 Hz −1 spectral efficiency 17 . By using multicore transmissi...

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Section: Experimental Implementationmentioning

confidence: 99%

Ultra-high-density spatial division multiplexing with a few-mode multicore fibre

et al. 2014

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“…Early interest in PLs were based on their original application in astronomical instrumentation [75,76], but recently its application in optical fiber communication has been attracting increased attention from researchers. The PL can be a spatial multiplexer for space-division multiplexing because one PL can multiplex N modes where N is the number of SMF used to fabricate the PL, which in principle allows the capacity of the communication system to be multiplied by N [77][78][79][80][81][82][83][84][85][86][87][88][89].…”

Section: Oam Generation Based On Photonic Lanternmentioning

confidence: 99%

“…There are five types of PLs that have been reported to date [80][81][82][83][84][85][86][87][88][89][90]. The first type of PLs is fabricated by inserting N separate SMFs into a surrounding glass cane which is usually the PCFs made from glass with a pattern of air holes in the cladding [80,81].…”

Section: Oam Generation Based On Photonic Lanternmentioning

confidence: 99%

Generation of Orbital Angular Momentum Modes Using Fiber Systems

et al. 2019

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Orbital angular momentum (OAM) beams, characterized by the helical phase wavefront, have received significant interest in various areas of study. There are many methods to generate OAM beams, which can be roughly divided into two types: spatial methods and fiber methods. As a natural shaper of OAM beams, the fibers exhibit unique merits, namely, miniaturization and a low insertion loss. In this paper, we review the recent advances in fiber OAM mode generation systems, in both the interior and exterior of the beams. We introduce the basic concepts of fiber modes and the generation and detection theories of OAM modes. In addition, fiber systems based on different nuclear devices are introduced, including the long-period fiber grating, the mode-selective coupler, microstructural optical fiber, and the photonic lantern. Finally, the key challenges and prospects for fiber OAM mode systems are discussed.

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“…A broadband mode converter between LP 01 and LP 02 was proposed and demonstrated in [27], in which PCF with pressurized holes inflated, but the plugged holes collapsed to form a new annular core around the original core were used to achieve the mode conversion. Similarly, based on the same principle, a three-mode multiplexer was demonstrated [28]. All-fiber/waveguide mode converters and multiplexers generally can have a high mode conversion efficiency (80%-90%) [29], and can be compact, but they have more wavelength dependence than free-space optics.…”

Section: Introductionmentioning

confidence: 99%

Analysis of optical fiber-based LP_01 ↔ LP_02 mode converters for the O-, S-, and C-Band

2015

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This paper proposes a double fiber taper-based mode converter that converts LP(01) to LP(02) and vice versa. The first taper is used to convert LP(01) to some higher order LP(0m) (m>1) modes while the second taper suppresses the undesired higher order modes (m>2) and results in LP(02) overwhelmingly dominated. A simulation shows that conversion efficiency of almost 100% at the central wavelength of O-, S-, and C-Band, and above 98% over the S- and C-Band was achieved. Moreover, suppression of undesired higher order modes is more than 10 dB over the whole O-, S-, and C-Band. In particular, the suppression is more than 19 dB for the whole C-Band. The analysis also shows that the performance of the mode converter is not sensitive to slight variations of the converter's parameters. The same converter also can be used to convert LP(02) back to LP(01). It is shown that conversion efficiency higher than 99% and suppression of undesired higher order modes higher than 30 dB can be obtained. Further, a (de)multiplexer for an LP(02) and an LP(01) mode was designed using the mode converter combined with a symmetric directional coupler. The multiplexer is broadband and has an insertion loss less than 0.5 dB in the C-Band.

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Three-mode multiplexer in photonic crystal fibre

Cited by 10 publications

References 0 publications

Ultra-high-density spatial division multiplexing with a few-mode multicore fibre

Ultra-high-density spatial division multiplexing with a few-mode multicore fibre

Generation of Orbital Angular Momentum Modes Using Fiber Systems

Analysis of optical fiber-based LP_01 ↔ LP_02 mode converters for the O-, S-, and C-Band

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