OFC Networks: PON, GPON and

Radio on Fiber

PRESENTED BY:

Dr. BALJEET KAUR

ASSISTANT PROFESSOR

DEPARTMENT OF ECE, GNDEC LUDHIANA

PON and GPON

Motivation

• Increased dependency on internet information across the globe.

• Traffic increase by more than 100% in a year.

• Every minute more than 12 million email messages move across the internet

and about half-a-million voice mail messages move in a minute.

• More than 100 million people log on to the internet in a day to access various

types of information.

• Neither DSL(Digital subscriber loop) nor CMs (cable modems) can keep up

with such high demand. Both technologies are built on top of existing copper

communication infrastructure not optimized for data traffic.

• DSL and CMs can not support full service voice(telephone),video (TV) and data

(Internet access) networks.

• Most network operators have come to the realization that a new data-centric

solution is necessary. Such a technology would be optimized for IP data traffic.

• Passive Optical Network (PON) is a technology viewed by many as an attractive

solution to this problem.

• A PON allows for longer distances between central offices and customer premises

while with DSL the maximum distance between the central office and the customer is

only approximately 5.5 km, a PON local loop can operate at distance of over 20 km.

Local Area Networks

• use copper cable

• get high data rates over short distances

Core Networks

• use fiber optics

• get high data rates over long distances

Access Networks (Weak Spots) Fig. 1

Access network is a part of telecommunication network that connects subscribers

to their service providers. It is the network between Central Office (CO) and end

users. It is Hard for end users to get high data rates because of the access bottleneck

• long distances

so fiber would be the best choice

Core Access

LAN

Where PON required?

The logical ways to deploy optical fiber in the local access network are :

˙Point-to-Point (P2P)

˙Curb-switched network

˙Passive optical network (PON)

Why PON?

PON Architecture

PRBS

Generator

NRZ Pulse Generator

CW Laser MZ

Modulator Photo detector

LPF

Visualizer

OLT

OLT-OPTICAL LINE TERMINAL

ODN-OPTICAL DISTRIBUTION NETWORK

ONU-OPTICAL NETWORK UNIT

Fig.3 –Passive Optical Network Architecture

Splitter

ODN

ONU

Downstream

1550 nm

1310 nm

Upstream

PON consists of a CO node, called an optical line terminal

(OLT), one or more user nodes, called optical network units

(ONUs) or optical network terminals (ONTs), and fibers and

splitters between them, called the optical distribution

networks (ODNs) .

PONS are called "passive" because, other than at the central

office (CO) and subscriber endpoints, there are no active

electronics within the access network.

Hence, due to the lack of active units in the light path the

architecture of PON is simple, cost effective and it offers

virtually unlimited bandwidth to the subscriber that is not

possible to achieve by other access netwoks.

Passive

Devices

ODN

PON Overview

OLT: Optical Line Terminator

ONU: Optical Network Unit

ODN: Optical Distribution Network

Depending on where the PON terminates, the system can be described as fiber-to-

the-curb ( FTTC), fiber-to-the-building (FTTB), or fiber-to-the-home (FTTH).

ITU-T G.983

ATM-PON (APON)

• The first Passive optical network standard Based on ATM

• Typical data rate: 54 Mbps to 155 Mbps

Broadband PON (BPON)

• Support 622 Mbps

IEEE 802.3ah Ethernet PON (EPON)

• Completed in 2004 as a part of the first mile project

• Data rate: 1.25 Gbps in both downstream and upstream direction and based on Ethernet protocol

ITU-T G.984 Gigabit PON (GPON) -

• 2.5 Gbps in downstream direction and 1.25 Gbps in upstream direction

GPON is today’s frontrunner in Europe, while EPON has been massively deployed in Asia.

Types of PON

Current Access Technologies

Service Medium Downstream

(Mb/s)

Upstream

(Mb/s)

Maximum

Reach (Km)

ADSL Twisted pair 15 3.8 5.5

VDSL Twisted pair

100 30 0.5

HFC Coax cable 40 9 25

Wi-Fi

Free Space 54 54 0.1

Wi - MAX Free Space 134 134 5

B-PON

Fiber 622 155 20

E-PON Fiber 1000 1000 20

G-PON Fiber 2500 1500 20

Comparison between EPON and GPON E-PON G-PON

Standard ITU.T IEEE

Framing Ethernet GEM

Maximum bandwidth 1.25 Gb/s (↑↓)

2.5 Gb/s (↓)

1.25 Gb/s (↑ )

User Per PON 16-32 32-64

Bandwidth per user 30-60 Mb/s 40-80 Mb/s

Broadband Efficiency 92% 72%

Application Mode Multiservice/ FTTx Pure Data Service

Maturity Large Vendors Involved Small Vendors Involved

GEM- G-PON encapsulation mode

PON Advantages

• Higher line rates : Due to high data capacity of fiber.

• Longer physical reach: allows reach of over 20 km without

amplification, as optical fiber has much less attenuation.

• Equipment sharing: E/O components and electrical devices at the

CO are shared amongst a large number of subscribers.

Reduced maintenance cost: as no need of providing power to

electrical devices in the field.

In Downstream traffic only OLT can send data, no danger of collisions.

In Upstream traffic all ONUs can send data, need collision prevention

mechanism.

Ethernet offers CSMA/CD: Works but doesn‘t avoid collisions and

wastes bandwidth.

Solution: multiplexing (multiple access)

Divide the physical media into multiple virtual medias, offer each ONU

a separate channel.

Several types of multiplexing

Time Division Multiplexing (TDM)

Wavelength Division Multiplexing (WDM)

Hybrid WDM/TDM PON

Current Status of PON

PON Multiplexing Techniques

a) TDM PON

b) WDM -PON

PON Multiplexing architectures. (a) TDM-PON (b)WDM-PON (c) WDM-TDM PON

TDM-PON

• Remote node containing optical power splitters, connects OLT to

many ONUs.

• In the downstream direction, all the broadcasted information is

received at every ONU through splitter.

• At the ONU, the relevant packet with correct address label is

processed and all other data is discarded.

PON Multiplexing architecture TDM-PON

Disadvantages of TDM-PON

Shared traffic structure is a major roadblock for the future development

of TDM-PON.

• Furthermore, the use of optical power splitter leads to security issues

and significant power losses .

• 1:32 optical splitter imposes more than 17 dB insertion loss.

WDM-PON

WDM-PON is a promising solution to improve the performance such as

bandwidth, security and power loss.

• Signals are coded on separate wavelength channels.

• Wavelength splitting done at passive (de-) multiplexer by AWG (Arrayed

waveguide grating).

PON Multiplexing architecture WDM-PON

Contd….

• Reduced insertion loss (i.e. 3-5 dB caused by AWG) helps to improve the

power budget as well as increasing the transmission distance.

• This approach creates a point-to-point (PtP) link where a dedicated

wavelength channel is reserved between the OLT and each ONU.

• Thus, each ONU can operate at the full bit rate of its own wavelength

channel.

Disadvantage:

• Cost: Each user requires its own dedicated transceiver at the OLT.

• The AWG filter is more expensive than the splitters used with GPON,

EPON, and BPON.

Hybrid WDM/TDM PON

• PON combining WDM and TDM technologies called HPON is the most

promising candidate for Next-Generation Optical Access (NGOA) networks.

• High split ratio (large no. of users) is provided by TDM-PONs and large

number of wavelengths and high capacity per wavelength offered by WDM-

PONs.

PON Multiplexing architecture WDM/ TDM-PON

Types of WDM/TDM-PON

1. Static WDM/TDM-PON

Each wavelength can be shared by several ONUs, and the

wavelength assigned to an ONU remain unchanged from

installation until disconnection.

2. Dynamic WDM/TDM-PON

ONU wavelength assignment can be dynamically changed

during communication/operation.

Challenges to WDM and Hybrid PON

• Relatively high cost of the WDM components.

• In a WDM-PON, each OLT and ONU needs a different wavelength

for downstream and upstream transmission, introducing a serious

operational and economical issue.

• Many research efforts are focused on to realize the colorless ONU

i.e. wavelength independent ONU so to achieve low cost

transceiver.

Colorless ONU

• A colorless ONU will support all wavelength channels, reducing

cost through volume production of one component.

• Therefore, ONU must contain tunable transmitter and receiver

devices.

• A tunable filter is used to select or tune to any of the downstream

wavelengths and tunable laser is used to provide colorless upstream

transmitter.

.

Hybrid TWDM-PON/ Wireless access

networks (Fi-wi)

• Wireless and optical technologies are playing a crucial role in

modern access networks.

• Service operators are looking for optical and wireless

integration, so to combine WTDM-PONs with emerging

broadband wireless access technologies such as WiMAX,

WiFi.

• Complementary features, i.e. high capacity provided by optical

network and mobility offered by wireless network are

exploited so to enable the delivery of quad-play services

(video, data, voice and mobility).

Contd…

•The optical backhaul is a

Hybrid-PON which contains

an OLT at CO, SMF, RN, and

multiple access points (APs).

•The wireless front-end

consists of widespread APs to

penetrate numerous wireless

end users (WEUs).

Fig.19 – Wireless optical access network architecture[]

Conclusion

• WDM and Hybrid technology offers a great promise to meet NG-

PON requirements and have several advantages over TDM PONs.

• But there are several disadvantages such as high cost ONUs for P2P

links in WDM PON.

• Future research efforts devoted to solve the issue will provide a way

out of this.

Related Publications

• Next Generation Optical Access Networks: A Review , Avneet Kaur,

Baljeet Kaur and Kuldeepak Singh, Proceedings of 4th International

Conference on Advancements in Engineering & Technology (ICAET-

2016), ISBN No. 978-81-924893-1-5.

• Design and Performance Analysis of Bi-directional TWDM OFDM-

PON with wavelength reuse Scheme, Avneet Kaur, Baljeet Kaur and

Kuldeepak Singh, IEEE international conference on Recent Trends in

Electronics Information Communication Technology, May 20-21, 2016,

India.

• Performance Analysis of Hybrid TDM-WDM 10G –PON and 40G-

PON for NG-PON, Avneet Kaur , Baljeet Kaur, International Conference

on Soft Computing, Intelligent Systems and Applications , Springer

Advances in Intelligent Systems and Computing Series.

References

[1] A.O. Aldhaibani, S.M. Iris and Zulkilfi N., “ 2.5 Gb/s Hybrid WDM/TDM PON using

Radio Over Fiber Technology,” Optik, vol.124, pp.3678-3681, 2013.

[2] A. Chenika , A. Temmar and O. Seddiki , “Transmission of 4× 40/10 Gbps in a WDM-

PON using NRZ-DQPSK/ASK modulation,” Optik ,vol.125,pp.-6296-6298, 2014.

[3] M. E. Abdalla , S. M. Idrus & A. B. Mohammad , “ Hybrid TDM-WDM 10G-PON for

High Scalability Next Generation PON,” Industrial Electronics and Applications (ICIEA)

,8th IEEE Conference, 2013.

[4] Y. Luo, X. Zhou , F. Effenberger, X. Yan, G. Peng, Y. Qian, and Y. Ma , “ Time- and

Wavelength-Division Multiplexed Passive Optical Network (TWDM-PON) for Next-

Generation PON Stage 2 (NG-PON2),” IEEE Journal Of Lightwave Technology, Vol. 31,

No.4,2013.

[5] M.S. Ahsan, M.S. Lee, S. H. Shah Newaz and S.M. Asif , “ Migration to the Next Generation

Optical Access Networks Using Hybrid WDM/TDM-PON ,” Journal of Networks ,Vol 6, no.

1, pp.18-25, January 2011.

[6] S. Bindhaiq , A. S. M. Supa'at, N. Zulkifli, A. B. Mohammad, R. Q. Shaddad , M. A.

Elmagzoub , A. Faisal , “Recent development on time and wavelength-division multiplexed

passive optical network (TWDM-PON) for next-generation passive optical network stage 2

(NG-PON2) ,” Optical Switching and Networking, vol.15,pp. 53-66, 2015.

[7] I. Mohamed and M.S. Ab-Rahman, “ Options and challenges in next-generation optical access

networks (NG-OANs) ,” Optik, vol.126, pp. 131-138 , 2015.

[8] Y. Luo , X. Zhou, F. Effenberger, X. Yan , G. Peng , Y. Qian , and Y. Ma , “ Time- and

Wavelength-Division Multiplexed Passive Optical Network (TWDM-PON) for Next-

Generation PON Stage 2 (NG-PON2),” IEEE Journal Of Lightwave Technology, Vol. 31,

No.4,2013.

[9] J. Kani, “Enabling Technologies for Future Scalable and Flexible WDM-PON and

WDM/TDM-PON Systems,” IEEE Journal Of Selected Topics In Quantum Electronics, Vol.

16, No. 5, pp. 1290-1297,October 2010.

Radio Over Fiber (RoF)

• To meet the explosive demands of high capacity and broadband

wireless access, modern cell based wireless networks have trends

i.e. continuous increase in the number of cells and utilization of

higher frequency bands.

• It leads to a large number of base stations (BSs) to be deployed,

therefore cost effective BS deployment is a key to success in the

market. In order to reduce the system cost Radio over Fiber (RoF)

has been proposed since it provides functionally simple BSs that are

interconnected to a central control station (CS) via an optical fiber.

Radio over Fiber (RoF)

Radio over Fiber (RoF)

RoF based on (Radio over Fiber) that refers to a technology that use light to

modulate electrical signal (radio signal) and transmit it over optical fiber link to

distribute radio signals from central location to remote stations. At the receiving

end, RF signal is demodulated and transmitted to the corresponding wireless user.

RoF is an analog optical link transmitting modulated RF signals.

It serves to transmit the RF signals down- and up-link, i.e. to and from central

stations (CS) to base stations (BS) also called radio ports.

Control System (CS)

BS

E/O

O/E

Base Station

Optical Fiber

T/R E/O: Electric to Optic Convertor

O/E: Optic to Electric Convertor

T/R: Transmitter/Receiver

Radio over Fiber System

Mobile Stations

TYPES OF CELLULAR NETWORKS

• MACROCELL

• MICROCELL

• PICOCELL

A macrocellular network

is deployed using large

cell with distance of 16 to

48 Km. This network

uses fewer sectors. A

regional switching

centre controls

interconnection with

PSTN.

MACROCELL

– Microcellular radio networks used in areas with high traffic density, like suburban areas. The cells have radii between 200 m and 1km .

– To support growing number of mobile users and to support frequency reuse increase, the cells may be subdivided into smaller units called microcells.

– Thus Microcells increase capacity and also reduce power consumption & size of handset devices.

MICROCELL

PICOCELLS

• A picocell with cell sizes of 4 to 200 meters is a small

cellular base station typically covering a small area, such as in-

building (offices, shopping malls, train stations, stock

exchanges, etc.), or more recently in-aircraft.

• In cellular networks, picocells are typically used to extend

coverage to indoor areas where outdoor signals do not reach

well, or to add network capacity in areas with very dense

phone usage, such as train stations or stadiums.

• Picocells provide coverage and capacity in areas which are

difficult or expensive to reach using the more

traditional macrocell approach

In a RoF system, most of the signal processing (including coding,

Multiplexing, and RF generation and modulation) are carried out by the

Central Office (CO), which makes the Base Station (BS) cost-effective. RoF technique has the potentiality for the backbone of the wireless

access network. Such architecture can give several advantages, such as reduced complexity at the antenna site, radio carriers can be allocated dynamically to different antenna sites, transparency and scalability.

Benefits of RoF Technology

Applications

Cellular network

Satellite Communication

Video distribution system

Mobile Broadband services

Wireless LAN

Merging of WDM PON with Radio over Fiber

Networks

Mobile traffic is rapidly increasing to access variety of services and

their access methods diversifies in various types of radio air interfaces.

This trend requires the more and more efficient use of radio frequency,

and the reduction of radio cell size for wireless access.

WDM-PON is investigated for its large data bandwidth, enhanced

security, and scalability to support several local subscribers. Integrating

a mm-wave RoF system with a WDM-PON (WDM-RoF-PON) is a

very attractive solution to significantly increase the overall capacity

and coverage area of the RoF access networks.

WDM-RoF PON Model

Design Inside ONU1 Subsystem

Parameter Value (IEEE 802.3 ah Standard)

Maximum downstream bit rate 1.25 Gbps

Maximum upstream bit rate 1.25 Gbps

Downstream Wavelength 1550 nm

Upstream Wavelength 1300 nm

Traffic Mode Ethernet

Modulation Format NRZ

OLT Power 0 dBm

ONU Power 0 dBm

Insertion Loss

(Circulator Bidirectional)

3 dB

Length

(Bidirectional Optical Fiber)

20 km

Dispersion

(Bidirectional Optical Fiber)

16.75 ps/nm/km

Dispersion Slope (Bidirectional Optical Fiber) 0.075 ps/nm2/km

Attenuation Constant

(Bidirectional Optical Fiber)

0.2 dB/km

Insertion Loss

( Bidirectional Splitter 1:8)

1.5 dB

Design Parameters

Results

First channel Radio frequency

at 15 GHz

First channel carrier frequency

at 193.1 THZ

Results

Second channel Radio

frequency at 15 GHz

Modulated Spectrum

after WDM-MUX

Second channel carrier

frequency at 193.2 THz

Eye diagram at Rx1 Eye diagram at Rx2

Results

Q= 6.12

BER= 3.2356e-009

Q= 6.52

BER= 3.2356e-011

Conclusion

• The simulation model for PON has been simulated by taking 20 km of

fiber length i.e. sufficient for different applications of this technology.

• It shows that various customer application requirements can be

satisfied and services can be prioritized and granted to the customers

and now it is easy for end users to get high data rates because of the

access bottleneck.

• The use of simulation helps us to focus on identifying the right design

and making decisions regarding how to deploy PON to address the

service needs without getting bogged down on a technology debate.

Performance enhancement with square

root module for WDM RoF-PON link

SQRT Filter Module (MATLAB Component)

In the design of WDM RoF-PON link, the optical receiver, receives the transmitted

signal and converts it back into electrical form and recovers the transmitted data.

At receiver side, PIN diode detector is used, which is a squaring device.

The PIN photodiode, when direct detecting the incoming optical power performs a

modulus square operation applied to the optical field.

IRX = Ein 2

where Ein is the input optical field envelope at the receiver

IRX is the detected electrical current

Hence, the whole system transfer function of an optical communication system is

made non-linear by the photodiode square law operation and the optical linear effects

generating Intersymbol Interference (lSI) are not linear any more.

A square root (SQRT) transfer function module (SRm) is proposed and placed after

the photodiode, compensates the square-law characteristic for improving the

performance of linear equalizers .

The SQRT filter is designed through MATLAB programming to see the performance

of WDM Transmission link

SQRT Filter Module (MATLAB Component)

SQRT filter at the receiver

MATLAB script

OutputPort1 = InputPort1;

if(outputPort1.TypeSignal==’Electrical’)

[LS,CS] = Size(InputPort1.Signal);

if(CS>0)

for counter1=1:CS

OutputPort1.Sampled(1,Counter1).Signal(1; :) =

sqrt(InputPort1.sampled(1,Counter1).signal(1,:));

end

end

end

SQRT Filter Module (MATLAB Component)

The MATLAB script which is used to interface MATLAB component with

simulation model has been described below.

In this script output and input ports of MATLAB component are defined as

electrical signals. The function LS and CS have been used to define input port for

optical or electrical signal. In case CS > 0 then input port is identified as electrical

port, and if LS > 0 then input port is optical port. Here CS > 0 is used to define

input as electrical in order to differentiate the electrical signal received from the

output of the PIN diode.

WDM PON model for radio frequency with SQRT Matlab

component

Design Inside ONU1 Subsystem Design Parameters

Parameter Value

Photo detector type PIN

Responsivity 1 A/W

Dark current 10 nA

Electrical filter type Band Pass RC filter

Bandwidth of electrical

filter

1.5 * bit rate Hz

Gain of electrical

amplifier

15 dB

Eye Diagram( At ONU_1 at 193.1 THz)

Q= 6.12

BER= 3.2356e-009

Q= 12.22

BER= 8.2356e-036

The improvement in the performance has been reported four times with the use

of SQRT Module at the receiver.

Eye Diagram( At ONU_1 at 193.2 THz)

Q= 7.52

BER= 3.2356e-012

Q= 14.84

BER= 3.2356e-048

The improvement in the performance has been reported four times with the use

of SQRT Module at the receiver.

Signal power with and without SRm

Receivers SNR with SRm ( dBm) SNR without SRm

( dBm)

ONU1 4.675 −20.563

OLT −47.118 −84.896

•The significant improvement in the signal power has been noticed which is

4.675, −47.118 dBm with SRm and −20.563, −84.896 dBm without SRm for

ONUs and OLT respectively.

•The BER patterns are showing improved performance with the use of SRm and

it is also observed in terms of signal power (compared before and after SRm).

Q factor vs. length

Q factor is maximum with SRm as compared to without SRm for different lengths

of fiber.

For Tx1, performance of the system is quite good even if input power is in the

range of −38 to 18 dBm with the use of SRm while this link is usable at input

power of −7 to 8 dBm without SRm similarly for Tx2, this range is −25 to 24

dBm with the use of SRm while this link is usable at input power of −6 to 15

dBm without SRm.

Q factor at Rx1 for different input

powers of Tx1 Q factor at Rx1 for different

input powers of Tx2

Conclusion

• In this simulation SRm is used at receiver side, which plays an

important role to enhance the performance of WDM-PON with RoF

technology.

• The improvement in the performance has been reported four times in

terms of BER for successful transmission over the distance of 20 km.

• Results are also compared for different fiber lengths and input powers

with and without SRm at the receiver and improvement in the

performance has been shown.

Performance enhancement with OSSB

transmission on WDM RoF-PON link

Why SSB Transmission?

• Fiber chromatic dispersion is one of the factors limiting transmission

distances in optical high-speed transmission systems.

• For a single mode laser, the symmetrical sidebands are created on the

optical carrier. Due to fiber chromatic dispersion, a relative phase shift is

added to these sidebands .

•Optical single sideband (OSSB) transmission is seen an excellent

method to overcome this problem. Dispersion effects can be reduced by

elimination of one sideband to produce an optical single-sideband (SSB).

•SSB technologies can suppress nonlinear optical effects because of the

reduced optical power to demonstrate the potential of modulators.

In this analysis ODSB signal is converted into OSSB through dual electrode MZM.

A CW signal from a laser with amplitude A and frequency fc is externally modulated

by an RF signal with amplitude Vac and frequency fm using the dual electrode MZM.

The RF signal is applied to both electrodes with π/2 phase shift applied to one

electrode. The output signal from the MZM is represented by

If the MZM is biased so that β=1/2 (i.e. at quadrature) and is driven such that α < 1/

π, equation 1 can be expanded using Bessel functions to

eq.1

eq.2

The Fourier transform of autocorrelation of gives the power spectrum

density SE(ω):

eq.3

The first term in equation 3 is the optical carrier while the second term represents

the lower sideband at the optical frequency ωc – ωm .

OSSB Generation

OSSB model for WDM–PON with radio frequency using SQRT

module

Generation of OSSB

To generate OSSB signal, input is applied to both the electrodes of Mach-

Zehnder modulator, in one electrode directly and another with π/2 phase shift.

Design inside first ONU1 Measurement blocks after ONU1

The received signal after WDM DEMUX is fed into a PIN photo-detector with

800 GHz sampling rate, responsivity of 0.6 A/W and a dark current of 1ηA.

After that band pass Bessel filter at 15 GHz frequency and 2.5 GHz bandwidth

and AM demodulator at 15 GHz frequency and 0.9375 GHz cut-off frequency

are selected for the electrical transmission. 3R regenerators and BER analyzers

are placed at receiver side to analyze the output .

(a) (b)

OSSB transmission spectrum (a) after Subsystem1(b) after WDM MUX

Optical SSB transmission with the suppression of 5 dB in the main carrier and 10

dB in the subcarrier is obtained. Further, performance of the system is enhanced

by using a SRm at receiver side to compensate the square-law characteristics of

photodiode.

Results

In downstream direction five channels 1552.5, 1551.72, 1550.91, 1550.11 and

1549.31 nm wavelengths with 0.8 nm spacing and 0 dBm power is combined

through WDM MUX and then transmitted via bidirectional optical fiber.

Results

Output at Rx1: (a) ODSB (b) OSSB without SRm (c) OSSB with SRm

BER= 4.2356e-027 BER= 6.4946e-054

For the successful transmission of OSSB, improvement in the performance in

terms of Q factor has been reported 67% as compared to ODSB and it is

further enhanced by 43% with the use of SRm.

(a) (b) (c)

BER= 3.2356e-009

53

Baljeet Kaur

The performance in the OSSB trans-mission link is quite good even if input

power is in the range of −55 to 28 dBm with the use of SRm while the link is

usable at input power of −12 to 26 dBm in case of without SRm.

Q factor versus input power for SSB with and without SRm

Analysis of results

Conclusion

• In this simulation, a technique for the generation of OSSB transmission

with carrier for WDM -PON with Radio over Fiber (RoF) optical link

is proposed.

• The suppression of 5 dB in carrier and 10 dB in the sidebands has been

shown.

• For the successful transmission of OSSB, improvement in the

performance in terms of Q factor has been reported 67% as compared

to ODSB and it is further enhanced by 43% with the use of SRm.

Related Publications

1. Performance enhancement with square root module for WDM RoF-EPON link, Baljeet Kaur,

Vinod Kapoor, Ajay K Sharma, Optik - International Journal for Light and Electron Optics, Volume

124, Issue 10, May 2012, Pages 967-971 (Impact Factor 0.526).

1. On WDM RoF–EPON link using OSSB transmission with and without square root module,

Baljeet Kaur, Vinod Kapoor, Ajay K Sharma, Optik - International Journal for Light and Electron

Optics, Volume 124, Issue 12, June 2012, Pages 1334-1337 (Impact Factor 0.526).

2. OVSB Generation on WDM RoF-EPON Link using SOA, Baljeet Kaur, Vinod Kapoor, Ajay K

Sharma, Int. J. Journal of information Processing, Accepted, Jan. 2013 (Impact Factor 0.152).

3. Performance Analysis of WDM RoF-EPON Link with and without DCF and FBG, Baljeet

Kaur, Vinod Kapoor, Ajay K Sharma, Int. J. Journal of Optics and Photonics Journal, OPJ,

Accepted, Feb. 2013 (Impact Factor 0.252).

4. On WDM RoF–EPON link using OSSB transmission with and without DCF and FBG, Baljeet

Kaur, Vinod Kapoor, Ajay K Sharma, Optik - International Journal for Light and Electron Optics,

Volume 125, 2014, pages 2066-2069 (Impact Factor 0.526).

5. Performance enhancement of WDM RoF-EPON Link with OVSB transmission using DCF

and FBG, Baljeet Kaur, Vinod Kapoor, Ajay K Sharma, Optik - International Journal for Light and

Electron Optics, Volume 125, 2014, pages 2062-2065 (Impact Factor 0.526).

6. A Simulation Study On WDM Rof-EPON Link In The Presence Of Four-Wave Mixing, V.

Kapoor, B. Kaur, and A. Sharma,, International Academic Conference, Las Vegas, pp. 259-264, Oct.

2011.

7. A Comparative Analysis of WDM RoF-EPON Link with and without DCF, V. Kumar, B. Kaur,

and A. K. Sharma,, International conference (ICMEME 2012), Bangkok, pp. 31-34, March 17-18,

2012.

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