Auto-Configurable Optical Amplifier for Simple Network Operation and Flexible Access Network Design of a Passive Optical Network

Takuya Tsutsumi; Yu Nakayama; Shunsuke Kanai; Manabu Kubota; Akihiro Otaka

doi:10.1364/JOCN.9.000446

Journal of Optical Communications and Networking
Vol. 9,
Issue 5,
pp. 446-455
(2017)
•https://doi.org/10.1364/JOCN.9.000446

Auto-Configurable Optical Amplifier for Simple Network Operation and Flexible Access Network Design of a Passive Optical Network

Takuya Tsutsumi, Yu Nakayama, Shunsuke Kanai, Manabu Kubota, and Akihiro Otaka

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Takuya Tsutsumi, Yu Nakayama, Shunsuke Kanai, Manabu Kubota, and Akihiro Otaka, "Auto-Configurable Optical Amplifier for Simple Network Operation and Flexible Access Network Design of a Passive Optical Network," J. Opt. Commun. Netw. 9, 446-455 (2017)

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Abstract

In this paper, we propose an auto-configurable optical amplifier (AC-OA) for passive optical networks (PONs); the value of optical attenuation is automatically controlled to prevent optical overloading of the OA. The AC-OA has a variable optical attenuator (VOA) at the input and a controller synchronized with an external facility database (FDB). The controller obtains the infrastructure information of each ONU and calculates the optimum setting for the input VOA. This structure enables the AC-OA to autonomously react to the spectrum being used. We simulate AC-OA operation based on the parameters of a commercial access network and evaluate the installation-cost reduction possible.

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Type	Architecture	OA Location	References
I	Long-reach	RO	[5–7]
II	Long-reach	CO	[8,9]
III	High-splitting-ratio/long-reach	RO	[10,11]
IV	High-splitting-ratio	CO	[12,13]

Parameter	Type	Definition
$D_{t}$	Variable	Distance of the trunk span between the OLT and OA
$D_{a}$	Variable	Distance of the access span between the OA and the nearest ONU from the optical splitter
$d$	Variable	Distance between the nearest and farthest ONUs from the optical splitter
$N_{t}$ , $N_{a}$	Variable	Optical splitting ratio of trunk and access spans
$α_{t, i j}$ , $α_{a, i j}$	Given	Optical transmission loss per kilometer
$β_{t}$ , $β_{a}$	Given	Miscellaneous optical loss by connectors and fusion points and so on
$S_{OLT, i}$ , $S_{ONU, i}$ , $S_{OA, i j}$ , $S_{OA, i j}$	Given	Required minimum input power to the OLT, ONU, and OA, respectively
$T_{OLT, i}$ , $T_{ONU, i}$ , $T_{OA, i j}$ , $T_{OA, i j}$	Given	Damage threshold of the OLT, ONU, and OA, respectively
$P_{OA, i j} (Q)$	Given	Optical output power of the OA for input power Q

Infrastructure	$N_{t}$	$D_{t}$ [km]	$N_{a}$	$D_{a}$ [km]
#1	2	20	8	0.5, 5, 10, 18.5
#2	2	20	16	0.5, 5, 10, 18.5
#3	1	20	64	0.5, 5, 10, 18.5
#4	1	20	32	0.5, 5, 10, 18.5
#5	2	20	64	0.5, 5, 10, 18.5
#6	2	0	8	0.5, 5, 10, 18.5
#7	8	0	16	0.5, 5, 10, 18.5
#8	4	0	16	0.5, 5, 10, 18.5
#9	4	0	32	0.5, 5, 10, 18.5
#10	2	0	32	0.5, 5, 10, 18.5
#11	4	0	8	20.5, 25, 30
#12	2	0	16	20.5, 25, 30

		$VOA, a$ [dB]
Infrastructure	$VOA, t$ [dB]	$D_{a} = 0.5 km$	5 km	10 km	18.5 km	20.5 km	25 km	30 km
#1	0	6.4	6.2	6.3	6.4	—	—	—
#2	0	0	0	0	0	—	—	—
#3	2.9	0	0	0	0	—	—	—
#4	3.2	0.3	1.3	1.7	0.3	—	—	—
#5	0	0	0	0	0	—	—	—
#6	11.1	4.1	4.1	4.2	4.1	—	—	—
#7	9.8	0	0	0	0	—	—	—
#8	16.9	0	0	0	0	—	—	—
#9	4.8	0	0	0	0	—	—	—
#10	10.5	0	0	0	0	—	—	—
#11	0	—	—	—	—	0	0	0
#12	14.2	—	—	—	—	11.4	4.9	0

Parameter	Definition	Value
Parameter	Definition	Conventional OA	AC-OA
$C_{inst}$	Total installation costs for introducing the OA to the PON	—
$N$	Total number of subscribers under the OA	Variable
$C_{calc}$	Installation cost of the CC including its own price	0	100,000
$C_{o a}$	Price of an OA	2000	Variable
$n_{t}$ and $n_{a}$	Splitting ratio of the trunk and access spans, respectively	4 and 8
$γ_{t}$ and $γ_{a}$	Overload risk of the trunk and access spans, respectively	0.2 and 0.1
$w_{calc} \times p_{calc}$	Standard unit cost × operation time for calculating the ATT value	$100 \times 1$	0
$w_{chk} \times p_{chk}$	Standard unit cost × operation time for checking and selecting the ATT device	$100 \times 1$	0
$w_{olt} \times p_{olt}$	Standard unit cost × operation time for connecting the ATT on the OLT side	$100 \times 1$	0
$w_{onu} \times p_{onu}$	Standard unit cost × operation time for connecting the ATT on the ONU side	$100 \times 1$	0
$w_{set} \times p_{set}$	Standard unit cost × operation time for installing the OA	$100 \times 5$
$ϕ_{calc}$	Failure rate per unit period of the CC	0	0.1
$ϕ_{o a}$	Failure rate per unit period of the OA	0.2	Variable
$w_{maint, calc} \times p_{maint, calc}$	Standard unit cost × operation time for maintenance of the CC	0	$500 \times 2$
$w_{maint, o a} \times p_{maint, o a}$	Standard unit cost × operation time for maintenance of the OA	$500 \times 2$	$500 \times 2$

Abstract

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Journal of Optical Communications and Networking