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Extender for Broadcast and GE-PON (AG100/AG200)

1.

INTRODUCTION

Nowadays, high speed broadband connection using fiber
to the home (FTTH) has been implemented widely so that
subscriber number shows low increase rate in urban area.
However, early this year the government made a statement that they wish to raise the penetration rate of such
optical paths (high speed broadband communication network) from the current: 31% to 100%, in Japan, as soon
as possible. A key to achieve this objective is to extend
the FTTH connections even in rural area.
FT TH(gigabit Ethernet-passive optical network(GE-PON)) normally branches 1 fiber optic into 32 and it
is defined that the distance from head-end to subscriber
is 20 km due to attenuation limit. As a consequence, it
tells that FTTH is more suitable for urban area where population density is higher. On the other hand, it is less suitable for rural area where population density is lower.
In the mean time, broadcasts using FTTH is in continuous progress. From an architectural point of view, it issimilar to GE-PON so that it has been in demand to provide connections in wide range of area.

2.

fiber amplifier (EDFA). There is also a part called “ONU
(optical network unit) for monitoring”, which enables
monitoring the status of the amplifier at the head-end.
This figure shows the GE-PON extension and the broadcast extension as one system. However, it is possible tohave a GE-PON extension as two systems. Table 1 shows
basic specification of AG100.
For AG200, it is possible to have 2 systems for theGE-PON extension only. This is because it is assumed
that the broadcasts extension part is in a separate device
for indoor station installation.

FEATURES

In order to resolve above issue, two kinds of extenders areintroduced. Please refer to Figure 1 and Figure 2. AG100 inFigure 1 is made of aluminum die casting metal which canbe mounted on a utility pole. AG200 in Figure 2 is half-sized
rack mount type for indoor installation.
AG100, out door type, can extend the reaching distanceof the transmitted signal of the GE-PON and the reaching
distance of the transmitted signal of the broadcast. AG200 isa new development which extends the reaching distance ofthe transmitted signal of GE-PON only. Dimensions of AG100
is shown in Table 1, and AG200 is 240(W)×44(H)×352(D)mm respectively. The AG100 has suitable dimension andweight for installation on utility poles.
Connection block diagram of AG100 is shown in Figure
3. AG200 is not illustrated in the Figure. Please assume
that AG100 and AG200 are mounted at the similar location. AG200 is mounted indoors, unlike AG100 which ismounted on utility poles.
Figure 4 shows the AG100 internal block diagram.
Wavelengths are shown in Table 1. The block for amplifying GE-PON consists of an optical/electrical converter(O/E) and an electrical/optical converter (E/O). The block
for amplifying broadcast consists of an erbium doped

Figure 1

Extender (AG100).

Figure 2

Extender (AG200).

Table 1
Items
Wave length of light
GE-PON
Light attenuation limit
EDFA output
Power source
Power consumption
Dimension
WeightMaterial
Operation temperature

Basic specification of AG100.

Specification
PON downward: 1490 nm band, upward: 1310 nm band
EDFA downward: 1550 nm to 1560 nm
OLT side: default 29 dB (power penalty 1 dB included)
ONU side: default 29 dB (power penalty 1 dB included)16, 18, 20 dBm (configurable at selector SW)
AC 30 V or AC 60 V 50/60 Hz
Lower than 34 VA (with full implementation)
Lower than 29 VA (without monitoring)379 (W)×148 (H)×262 (D) mm (umbo not considered)
Less than 8.5 kg
Aluminum die casting–10 to 40°C (ambient temperature)

Furukawa Review, No. 38

2010

1

Extender for Broadcast and GE-PON (AG100/AG200)

3. IN CONCLUSION
By using this extender, it is possible to broaden the transmission distance drastically and to continue expanding
FTTH, irrespective of the population density. We arereviewing to roll out into other different industries as someof the CATV operators have already expressed interest inthis device.

ONU for Monitoring

Wavelength=1.49 µm

O/E

E/O

Wavelength=1.49 µm

Wavelength=1.31 µm

E/O

O/E

Wavelength=1.31 µm

Wavelength=1.55 µm

Wavelength=1.55 µm
EDFA

Figure 4

For more information, please contact
Broadband Products Division,
Telecommunications Company
TEL: +81-3-3286-3145 FAX: +81-3-3286-3987

Connection block diagram.

Many Terminals
Head-end

FITELwave AG20E

FITELwave AG20EL

FITELwave AG20EL

FITELwave
AG-Manager
FITELwave AG1600E

・・・

AG20E ：10 km
AG20EL：20 km

SW

FITELwave AG100

20km
10km

30km

Multi-Drop method
50km

Widening area

Figure 3

ExtenderConnection block diagram.

Furukawa Review, No. 3820102