FBT Coupler

Optiunik provides a wide breadth of FBT couplers, which includes SM standard coupler, dual-window coupler, three-window coupler, wideband coupler with low insertion loss and high performances. The FBT couplers are available with a coupling ration ranging from 1:99 to 50:50. Customized specifications are basically available. FBT Coupler is a type of splitter which is based on fused biconical taper technology. The technology is widely accepted and adopted in the PON solution. FBT or fused biconical taper is a traditional technology that two fibers are twisted and fused together under high temperature while the device is being elongated and tapered.

Category: FBT Coupler

Features of FBT Coupler

Compact size
Low insertion loss
Low PDL
High stability and reliability
Telecordia GR1221/1209 compliance

Applications of FBT Coupler

EDFA
CATV system
Passive network
WAN
FTTH & LAN

Parameter		Wide Band Coupler (WBC)		Dual Window Coupler (DWC)		Multimode Fiber Coupler (MMC)
Grade		P	A	P	A	P	A
Operating Wavelength (nm)		1310, 1550 or C+L Band		1310 and 1550		850 or 1310 or Specify
Operating Bandwidth (dB)		±40		±40		±40
Typical Excess Loss (dB)		≤0.07	≤0.1	≤0.07	≤0.1	≤0.4	≤0.7
Insertion Loss (dB)	50/50	≤3.4	≤3.6	≤3.4	≤3.6	≤3.7	≤4.0
	40/60	≤4.4/2.6	≤4.7/2.8	≤4.4/2.6	≤4.7/2.8	≤4.7/2.7	≤5.0/3.0
	30/70	≤5.7/1.9	≤6.0/2.0	≤5.7/1.9	≤6.0/2.0	≤6.0/2.1	≤6.3/2.4
	20/80	≤7.6/1.25	≤8.0/1.3	≤7.6/1.25	≤8.0/1.3	≤7.8/1.4	≤8.1/1.7
	10/90	≤10.65/0.65	≤10.9/0.8	≤10.65/0.65	≤10.9/0.8	≤11.2/0.9	≤11.6/1.2
	5/95	≤13.8/0.4	≤14.1/0.5	≤13.8/0.4	≤14.1/0.5	≤14.5/0.7	≤15.0/1.0
	3/97	≤16.15/0.3	≤16.5/0.4	≤16.15/0.3	≤16.5/0.4	≤16.15/0.3	≤16.5/0.4
	2/98	≤18.05/0.25	≤18.45/0.35	≤18.05/0.25	≤18.45/0.35	≤18.6/0.6	≤19.4/0.9
	1/99	≤21.15/0.2	≤21.65/0.3	≤21.15/0.2	≤21.65/0.3	≤22.0/0.5	≤22.8/0.8
Polarization Dependent Loss (dB)		≤0.1	≤0.15	≤0.1	≤0.15	–	–
Directivity (dB)		≥50				≥35
Operating Temperature (℃)		-10 ~ +70
Storage Temperature (℃)		-40 ~ +85

Configuration Type	1×2 or 2×2
Fiber Length	1.5m, or Specify
Fiber Type	250um bare fiber	900um loose tube	2mm, 3mm cable or 900um loose tube
Dimension	Φ3.0 × L54mm Φ3.0 × L60mm	Φ3.0 × L54mm Φ3.0 × L60mm	L90 × W20 × H10mm L100 × W80 × H10mm

A	B	C	D	E	F	G	H	I
Mode	Grade	Wavelength	Port	Fiber Type	Package	Fiber Diameter	Coupling Ratio	Connector
1=WBC 2=DWC 3=MMC S=Specify	P A	1=1550 2=1310 3=1310/1550 4=1310/1490/1550 S=Specify	1=1×2 2=2×2	0=SM 9/125 1=MM 50/125 2=MM 62.5/125 S=Specify	1=Φ3×54 2=Φ3×60 3=90×20×10 4=100×80×10	0=250um 1=900um 2=2.0mm 3=3.0mm	01=1/99 02=2/98 03=3/97 05=5/95 10=10/90 20=20/80 30=30/70 40=40/60 50=50/50	0=None 1=SC/APC 2=SC/UPC 3=LC/APC 4=LC/UPC 5=FC/APC 6=FC/UPC S=Specify

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