The number of customers to the present internet access network is raising everyday [1].They encourage academics to use optical access networks since standard single-mode fiber allows for the highest optical communication bandwidth [2]. In optical communication, a radio signal of high frequency in the optical form is transmitted over the standard single-mode optical fiber to enhance the bandwidth of the current communication network. This type of optical communication system is named as Radio over Fiber (RoF) system. The performance of such a rof system depends on various parameters and fiber crosstalk which limits the capacity requirements of the optical communication system [3]-[5]. The performance of optical communication system against various fiber crosstalks is given in [6]-[10].The best option for these kinds of access networks is passive optical networks (PONs).The most promising method in PONs for addressing capacity limit issues and enhancing spatial efficiency is TA-MCF with SDM. MCF comes in two categories couple type and uncoupled type fiber to transmit the information according to the application. In a couple typesof multi-core fiber, cores are arranged to maintain small inter-core interference for large-distance communication. Further core arrangements can be homogenous with identical cores [11]-[13], heterogeneous with non-identical cores [14],and quasi-homogeneous [15]with slightly different cores respectively. But to reduce inter-core crosstalk between cores, core-to-core distance should be more. While increasing core-to-core distance, core density decreases. Therefore, to enhance core density, a denser core arrangement came in to picture named as TA-MCF [16]-[17]. The optimized parameters of TA-MCF are very crucial to obtain minimum acceptable inter-core crosstalk [18]-[19].The first multicore multimode fiber (MC-MMF) for a passive optical network successfully uses space division multiplexing to eliminate the need for several feeder fibers is shown in [20]. Using trench-assisted multicore fibre (TA-MCF) at varied spans, it was possible to transmit five 4.224 Tb/s Nyquist super-channels over a distance of 2688 km for the first time at reduced channel spacing [21].
In current years, various technologies like triple play services in hybrid PON [22], hybrid PON + EDFA [23], hybrid PON + NRZ [24], and TDM with few modes PON [25], SDM PON + FM fiber [26], design of TA-MCF [18]-[19] has been projected as thefinest solution for fiber-to-the-home communication networks.
In previous work, we have analysed various research on WDM/TDM PONs. In view of [23] & [24], the finest modulation and amplifier wereanalysed in PON.Regrettably,these findings are only applicable to hybrid modulations using several feeder fibres to carry data signals and ordinary single-mode fibre. Thus, it is preferable to progress towards the PON TA-MCF. In [19] TDM-FM-PON was shown to completely eliminate upstream losses, however the transmission distance was only 20 kilometres. In [18]-[19] design of TA-MCF with 8 cores and 10 cores has been demonstrated with minimum inter-core interference.
In the present study, we demonstrate a single TA-MCF with 19 cores that transmit signals for upstream data transmission over a distance of 50 km in PON without using numerous feeder fibers.With fewer splitters and combiners, one TA-MCF can receive data from 19 ONUs in PON. With minimum acceptable inter-core crosstalk; TA-MCF is intended to lower upstream losses in a PONs network.
This paper is organized as given. The architecture of a homogeneous TA-MCF with TMC is described in section 1. In section 2, the suggested system configuration is described. Section 3 presents the findings and comments. Finally, section 4 mentions the conclusion.