Performance analysis of long band passive optical network using amplifier spontaneous noise and fiber Bragg gratings

Long band (L-Band) passive optical networks (PONs) are attracting a lot of attention these days, thanks to rising capacity demands. Because of PONs requesting more and more channels, fault detection/monitoring is critical. Fault detection in the conventional band (C-Band) employing reflecting Fiber Bragg Gratings (FBGs) and a probe signal integrating an additional amplified spontaneous noise (ASEN) source has been frequently demonstrated. However, interference occurs when ASEN and transmitter signals are in the same wavelength band, and adding additional ASEN sources to the network raises the overall cost. So, in L-Band PONs, a cost-effective, low-complexity fault detection/monitoring system is required. Therefore, in this work, a fault detection/monitoring system for L-Band PON using C-Band ASEN from inline erbium doped fiber amplifier (EDFA) and dual purpose FBG, i.e. (1) ASEN reflection for fault monitoring and (2) dispersion compensation is proposed. A 4 × 10 Gbps L-Band PON is investigated over 40 km feeder fiber (FF) and 1 km drop fibers (DFs) that serve 32 optical network units (ONUs)/different input powers, dispersion values, and laser linewidths in terms of reflective power of FBGs, eye opening factor, and bit error rate (BER), respectively.

Deducing of Optical and Electronic Domains Based Distortions in Radio over Fiber Network

Managing the users multimedia and long-range based demands, the radio over fiber (RoF) mechanism has been introduced recently. RoF mingles the optical and radio communication frameworks to increase mobility and offer high capacity communication networks (CNs). In this paper, a full-duplex RoF-based CN is investigated for the next-generation passive optical network (PON), utilizing wavelength division multiplexing (WDM) technology. The desolations on account of optical and electronic domains (OEDs) are addressed, using dispersion compensation fiber (DCF) and optical and electrical filters, including modulation scheme. The analytical and simulation models are analyzed in terms of phase error (PE), radio frequency (RF), fiber length and input and received powers. The performance of the proposed model is successfully evaluated for 50 km range, −40 to −18 dBm received power, −20 to 0 dBm input power, where below 10−6 bit error rate (BER) is recorded. Thus, this signifies that the presented model exhibits smooth execution against OEDs impairments.

Performance analysis of wavelength division multiplexing MDM-PON system using different advanced modulations

Mode division multiplexing (MDM) is very competent next generation multiplexing technique and is becoming popular among researchers these days. In this research article, an integrated passive optical network (PON) using MDM and wavelength division multiplexing (WDM) is proposed at 25 Gbps over 3 km multimode fiber (MMF) link distance. For MDM, diverse Laguerre–Gaussian (LG) such as LG12, LG15, LG18, LG111 and LG114 are incorporated and also for cost reduction, vertical cavity surface emitting laser (VCSEL) is located in optical line terminal (OLT). Performance of diverse advanced modulations such as compressed spectrum return to zero (CSRZ), duo-binary return to zero (DRZ) and modified duo-binary return to zero (MDRZ) is evaluated and compared with non-return to zero (NRZ) in terms of Bit error rate (BER) at varied MMF link lengths. Results revealed that CSRZ performance stand out and NRZ provide worst performance.

Protection Scheme for a Wavelength-Division-Multiplexed Passive Optical Network Based on Reconfigurable Optical Amplifiers

This paper demonstrates a wavelength-division-multiplexed passive optical network (WDM-PON) scheme based on novel reconfigurable optical amplifiers (ROAs). The measured switching characteristics of the ROA3 constructed with a 2 × 2 crossbar optical switch and a four-port reversible optical circulator (OC) and a conventional EDFA can meet the requirements of most network management and surveillance. The self-made four-port reversible OC’s response time is less than 2 ms, and its insertion losses are about 1 dB or less for all the transmission paths and switching states. An optimal design of ROAs is proposed and evaluated for bidirectional optical amplifier protection, in which ROA3 has an EDF length of 7.5 m long with a 1480 nm pump laser and possesses a backward or forward pumping configuration with the corresponding pump power of 200 mW or 50 mW. We verified the scheme’s feasibility through a simulation of WDM-PON systems with 40 downstream and upstream channels. This scheme enables the intelligent protection switching in practical operation scenarios for high-capacity multi-wavelength networks.

PERANCANGAN DAN PENGUKURAN PERFORMANSI JARINGAN FIBER TO THE HOME DENGAN TEKNOLOGI GIGABIT PASSIVE OPTICAL NETWORK MENGGUNAKAN APLIKASI OPTISYSTEM DI KELURAHAN SURAU GADANG

Pada tugas akhir ini dirancang suatu jaringan Fiber To The Home ( FTTH) di Kelurahan Surau Gadang yang mana daerah tersebut dilakukan perancangan dan pengukuran performasi jaringan dimana standar yang digunakan sesuai dengan PT. ICON+. Tata cara yang digunakan dalam perancangan ini ialah penen- tuan posisi, pengumpulan informasi, serta perancangan memakai aplikasi Google Earth serta OptiSystem. Hasil dari perbandingan antara pengukuran OptiSystem dan pengukuran di lapangan didapatkan hasil redaman yang berbeda, dimana hasil pengukuran pada OptiSystem pelanggan dengan jarak terjauh menghasilkan daya terima sebesar -18.277 dBm sedangkan untuk pengukuran di lapangan pelanggan dengan jarak terjauh menghasilkan daya terima sebesar -18.52 dBm. Parameter Rise Time Budget didapatkan dari perhitungan ialah 0. 029 ns yang sudah memenuhi stndar kelayakan ialah tidak lebih dari 0. 219 ns sedangkan nilai Bit Error Rate pada simulasi ialah 8.11464 x 10-33 yang sudah memenuhi standar kelayakan ialah tidak lebih dari 10-9. Nilai Signal To Noise Ratio (SNR) merupakan 50.044831 dB yang pula penuhi standar minimal SNR ialah 21.5 dB. Dari hasil perhi- tungan serta hasil simulasi didapatkan nilai-nilai yang masih memenuhi standar kelayakan jaringan Fiber To The Home sehingga rancangan layak buat diimplementasikan.

Design of L-Band Multiwavelength Laser for TDM/WDM PON Application

This paper presents on the design of L-Band Multiwavelength laser for Hybrid Time Division Multiplexing/ Wavelength Division Multiplexing (TDM/WDM) Passive Optical Network (PON) application. In this design, an L-band Mulltiwavelength Laser is designed as the downstream signals for TDM/WDM PON. The downstream signals ranging from 1569.865 nm to 1581.973 nm with 100GHz spacing. The multiwavelength laser is designed using OptiSystem software and it is integrated into a TDM/WDM PON that is also designed using OptiSystem simulation software. By adapting multiwavelength fiber laser into a TDM/WDM network, a simple and low-cost downstream signal is proposed. From the simulation design, it is found that the proposed design is suitable to be used in TDM/WDM PON for up to 64 Optical Network Units (ONUs).