Birefringence properties of a coiled single-mode fiber arid its use in a tuned optical amplifier

1985 ◽  
Author(s):  
NORI SHIBATA ◽  
MAKOTO TSUBOKAWA ◽  
MASAHARU OHASHI ◽  
KEN-ICHI KITAYAMA
Keyword(s):  
Single Mode ◽  
Optical Amplifier ◽  
Single Mode Fiber

RSOA-Based Full-Duplex WDM-PON for 20 Gbps Transmission in Two Channels Over a Long-Haul SMF Using External Modulation Scheme

2015 ◽  
Vol 36 (3) ◽  
Author(s):  
Anindya Sundar Das ◽  
Ardhendu Sekhar Patra
Keyword(s):  
Optical Network ◽  
Single Mode ◽  
Optical Amplifier ◽  
Single Mode Fiber ◽  
Passive Optical Network ◽  
Full Duplex ◽  
Modulation Scheme ◽  
Wavelength Division ◽  
External Modulation ◽  
Wdm Pon

AbstractWe have proposed and demonstrated a full-duplex wavelength division multiplexed passive optical network (WDM-PON) configuration based on reflective semiconductor optical amplifier (RSOA). RSOA is used for reusing and remodulate the downlink signal in the uplink. We have used external modulation scheme for transmitting 20 Gbps data rates in two channels over a 40 km single mode fiber (SMF). The uplink and the downlink performances are checked by the bit error rate (BER) and the eye diagrams.

scholarly journals Experimental Analysis of Cable Distance Effect on Signal Attenuation in Single and Multimode Fiber Optics

2018 ◽  
Vol 8 (3) ◽  
pp. 1577
Author(s):  
Uzairue Stanley ◽  
Victor Matthews Olu ◽  
Charles Ochonogor ◽  
Amaize Peter ◽  
Anyasi Francis
Keyword(s):  
Fiber Optics ◽  
Distance Effect ◽  
Single Mode ◽  
Optical Amplifier ◽  
Single Mode Fiber ◽  
Base Station ◽  
Multimode Fiber ◽  
Drastic Reduction ◽  
Long Distance ◽  
Distance Communication

<div class="WordSection1"><p>Losses during transmission and high demand of high data rate by the end users have become the biggest challenges facing the telecommunication industries worldwide with Nigeria inclusive. Fiber optic cable as a channel of communication has been adapted worldwide in solving these problems but there is a little limitation in the place of multimode fiber in long distance communication. This paper focuses on the effect of changes in distance on transmitted bandwidth on single mode and multimode fiber. Two cases were considered during this research; (a) with optical amplifier placed in between multimode fiber and (b) without optical amplifier in between multimode fiber. Readings were taken at various distances when specific bandwidth ranging from 50Mbps to 500Mbps was transmitted from the base station to the various distances and it was observed that there was no significant changes in bandwidth received at specified distances (100, 200, 300, 400, 500 etc) m when using single mode fiber, there was a drastic reduction in bandwidth when it get to a distance of 300m when using multimode. When optical amplifier was placed in between the multimode fiber at some selected distances after 400m from the transmitting BTS, it was noticed that the drastic reduction in transmitted bandwidth was almost eliminated, thereby proven that multimode fiber can be use in long distance communication provided optical amplifiers are incorporated in between the distance to bust the signal strength.</p></div>

scholarly journals High Speed OTDM-DWDM Bit Compressed Network for Long-Haul Communication

2019 ◽  
Vol 18 (2) ◽  
pp. 57-65
Author(s):  
Tadbirul Islam ◽  
Mohammad Nasir Uddin
Keyword(s):  
High Speed ◽  
Data Transfer ◽  
Time Window ◽  
Single Mode ◽  
Optical Amplifier ◽  
Optical Signal ◽  
Single Mode Fiber ◽  
Sequence Length ◽  
Transmission Distance ◽  
Communication Network Design

This paper represents an optical communication network design that incorporates both OTDM and DWDM techniques which provides up to 240 Gbit/s data transfer rate, long-haul communication distance of 2700 km with a maximum number of 384 channels in this designed architecture. Each channel has a bitrate of 625 Mbit/s that follows optical signal hierarchy OC-12, STS-12 (SONET ANSI), and STM-4 (SDH CCITT), and the design maintains standard parameters for commercially available channel grids at 100 GHz spacing. The communication is done by Single Mode Fiber (SMF) of 50 km and Dispersion Compensating Fiber (DCF) of 10 km followed by one optical amplifier gain in each span. Bit error rate (BER) remains significantly low while transmission distance for only OTDM is 18000 km at a BER < 10-12, and for the hybrid OTDM-DWDM it is 2700 km at a BER < 10-16. Both values are measured under 128 bits sequence length. Three compression stages are used for 8 channels each in order to minimize the gap between bits, and to utilize the space for more channels within a specific time window.

scholarly journals Enabling 4-Lane Based 400 G Client-Side Transmission Links with MultiCAP Modulation

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Anna Tatarczak ◽  
Miguel Iglesias Olmedo ◽  
Tianjian Zuo ◽  
Jose Estaran ◽  
Jesper Bevensee Jensen ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Direct Detection ◽  
Single Mode ◽  
Local Area ◽  
Optical Amplifier ◽  
Single Mode Fiber ◽  
Cavity Surface ◽  
Wavelength Band ◽  
Emitting Lasers ◽  
Client Side

We propose a uniform solution for a future client-side 400 G Ethernet standard based on MultiCAP advanced modulation format, intensity modulation, and direct detection. It employs 4 local area networks-wavelength division multiplexing (LAN-WDM) lanes in 1300 nm wavelength band and parallel optics links based on vertical cavity surface emitting lasers (VCSELs) in 850 nm wavelength band. Total bit rate of 432 Gbps is transmitted over unamplified 20 km standard single mode fiber link and over 40 km link with semiconductor optical amplifier. 70.4 Gb/s transmission over 100 m of OM3 multimode fiber using off-the-shelf 850 nm VCSEL with 10.1 GHz 3 dB bandwidth is demonstrated indicating the feasibility of achieving 100 Gb/s per lane with a single 25 GHz VCSEL. In this review paper we introduce and present in one place the benefits of MultiCAP as versatile scheme for use in a number of client-side scenarios: short range, long range, and extended range.

scholarly journals Self-Start Multi-Wavelength Laser Source with Tunable Delay-Line Interferometer and Optical Fiber Reflector for Wireless Communication System

2021 ◽  
Vol 11 (20) ◽  
pp. 9553
Author(s):  
Amare-Mulatie Dehnaw ◽  
Run-Kai Shiu ◽  
Ruei-Bin Chen ◽  
Jyun-Wei Li ◽  
Yibeltal-Chanie Manie ◽  
...  
Keyword(s):  
Transport System ◽  
High Capacity ◽  
Single Mode ◽  
Optical Amplifier ◽  
Single Mode Fiber ◽  
Experimental Result ◽  
Laser Source ◽  
Power Fluctuation ◽  
Noise Interference ◽  
Multi Wavelength

The radio-over-fiber (RoF) technique has gained a lot of interest recently, as the millimeter-wave signals can be generated and delivered in the optical domain with the advantages of low attenuation, high capacity, and being free from electromagnetic noise interference (EMI). In this paper, we propose and experimentally prove a self-start multi-wavelength laser source based on a distributed feedback laser diode (DFB-LD) for the RoF transport system. The self-start multi-wavelength laser source generates stable laser power with less than 0.18 dB power fluctuation and exhibits good stability. In order to estimate the transmission performance, data is externally modulated onto the multi-wavelength by a reflective semiconductor optical amplifier (RSOA) and transmitted through single-mode fiber (SMF). The experimental result proves that the proposed RoF transport system achieves error-free transmission and clear eye diagrams.

scholarly journals Impact of Combine Dithering and Modulators to Mitigate Noise in Radio Over Fiber System

2018 ◽  
Vol 12 (1) ◽  
pp. 428
Author(s):  
Fakhriy Hario ◽  
Eka Maulana ◽  
Hadi Suyono ◽  
Rini N Hasanah ◽  
Sholeh H Pramono
Keyword(s):  
Optical Fiber ◽  
Group Velocity Dispersion ◽  
Nonlinear Problems ◽  
Single Mode ◽  
Optical Amplifier ◽  
High Light Intensity ◽  
Single Mode Fiber ◽  
Radio Over Fiber ◽  
Fiber System ◽  
Spectrum Distribution

<p>A well-prepared Radio over Fiber (RoF) is a technology that combines two transmission technologies, radio and optical fiber transmissions. The study focused on the characteristics and problems of the optical fiber medium. One of the problems in the optical fiber is the effect of nonlinear characteristic, which caused by the high light intensity in the optical fiber core with extended interaction area in a single mode fiber (SMF). This characteristic reduces the output width and creates a pulse broadening. The nonlinear characteristics discussed in this study focused on SPM (self-phase modulation) and GVD (Group Velocity Dispersion). To overcome the nonlinear problems, this study presented a method to make the noise-resistant transmitted signal and improve the optical fiber power range. The fundamental of this study was developing similarities of previous studies regarding nonlinearity in the optical fiber. The results show that the use of two modulators combined with the amplification generated the signal with smoother spectrum, which means that the spectrum distribution was more uniform. There was 61.5 % increase of the peak power of the output signal after amplification using an optical amplifier.</p>

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