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Lateral Pressure Resistant Optical Fiber Cable “Gorilla Cable”

1.

INTRODUCTION

In recent years, the transmission capacity has been
increasing and the optical fiber cables which are connecting between equipment are becoming more important.
Therefore, the high strength optical fiber cable to mitigate
for the falling objects caused by earthquake disaster is
now required. Also, inside the factory, the optical fiber
cable which has a good load resistance is required
because Ethernet has been deployed and the opticalfiber cable is used for long distance transmission.
Okano Electric Co., Ltd. has developed the lateral pressure resistant optical fiber cable which has an excellent
load resistance without using the metallic protection toincrease its mechanical strength. This cable is superior toconventional cables on flexibility. Its commercial name is“Gorilla Cable”.

2.

FEATURES OF THE GORILLA CABLE

2.1 Cable Construction
The metallic components and the tension member rods
are used for conventional optical fiber cables. When lateral pressure is applied to the cable, it will be deformed andthe optical fiber will be attenuated due to the pressurecause by the outer jacket and the tension members. In
our case, Gorilla cable does not use a tension member inorder to reduce the lateral pressure applied to the opticalfiber. Further, by using a halogen-free special elastomer
for the jacket material, the cable has a high recovery force
because of its buffering effect. Also the cable was able torealize both a moderate repulsion and a higher flexibility.

Optical fiber cord
１２

TensionmemberTensilestrengthfiber

Halogen-freespecial elastomer

BlueOrange

FRPE jacket
Conventional cableGorilla cable

Figure 2	The comparison of the Gorilla cable construction to ourconventional cable.

2.2 Lateral Pressure Characteristics
When the optical loss caused by the load applied acrossthe 100 mm width plates is monitored, it is increasing in
proportion to the load in case of a conventional cable, butthere is no optical loss in case of the Gorilla cable.

Cable

Figure 3 Lateral pressure resistant test.

Figure 1 Connectorized Gorilla cable.

Furukawa Review, No. 44

201356

Lateral Pressure Resistant Optical Fiber Cable “Gorilla Cable”

Lateral pressure test result

Loss [dB]

1.80Conventional
GI round cable

Optical loss [dB]

1.60
1.40
1.20
1.00
0.80
0.60

GorillaGI cable

0.40
0.20

GorillaSM<R15> cable

2,00
04,00
06,00
08,00
010,000
12,00014,00016,00018,00019,000
解放
後

0.00

1.4
1.2
10.8
0.6
0.4
0.2
0－0.2
－0.4
－0.6
－0.8
－1－1.2－1.4－1.6

Lateral pressure [N/100 m]

Flexing characteristics of the Gorilla cable

Gorilla cable
Conventional cable

020K

10K

30K50K / turns

40KFigure 6 Optical loss during flexing test.

Figure 4 Optical loss vs. lateral pressure.

2.3 Cable Shape Recovery ForceTable 1 shows the recovery rate after a lateral pressure
test. A conventional cable does not recover the shapeafter a 20,000 N lateral pressure test, but the Gorilla cablehas a high recovery rate when using newly developed
halogen-free special elastomer.

2.5 Cable Characteristics
Table 2 shows the properties of the Gorilla cable. This
cable is focused on lateral pressure characteristics andhas no tension member, but it has excellent transmission ,mechanical, temperature cycling and flame retardantproperties.
Table 2

Table 1
Recovery rate (%)

The recovery rate of fiber cables.

Items

Gorilla cable

No. of fibers

2 fibers

1095

Optical fiber

SM [R15], GI50/125 (OM3/2)

Adaptable connectors

SC, S2, DSC, MU, dMU, LC,dLC, FC, D, MTRJ, ST

Cable diameter

6.0 mm

2.4 Flexing Characteristics
We have a long experience in producing flexible cables
and the associated technologies are applied to the Gorillacable. If we compare the 90 degree flexing characteristics, a conventional cable has an optical loss, but theGorilla cable has almost no optical loss even during flexing test.

90degrees bending to right and left
→90deg. to left→original position→
90deg. to right→original position---One turn of bi-directional bending(Flexing test)

Max. 60 turns/min.
(Variable)

Steady rest

Bending radius
Test result can be accelerated
by using smaller diameter.

Load (Min. 500g)

Weight of product35 g/mAllowable tension

less than 400 N

Lateral pressureless than 10,000 N/100 mm

Operating temperature range-10 – +60℃

Flame retardant

JIS C 3005 60 degree tilt test

3.

Cablespecification

Conventional cableRemark) recovery rate=diameter after test/diameter before testX100

Testing method

Cable specification.

Conclusion

Okano Electric Co., Ltd. has developed and commercialized an optical fiber cable which has an excellent load
resistant property. The features of this cable are to have asmall optical loss when the load is applied to the cable, ahigh recovery force of cable appearance and an excellent
scratch-resistance.
The plan is to develop design of Gorilla Cable with ahigher count of fibers and to aggressively target sales inoverseas market.
For more information about the Gorilla cable please contact:
Sales Department
Okano Electric Cable Co., Ltd.
Tel: +81-46-261-3122 Fax: +81-46-264-9150
E-mail: info-e@okano-cable.co.jp

Load is added on the assumptionof actual use.

Figure 5 Flexing test.

Furukawa Review, No. 44

201357