FBT Coupler

TS Communicationmanufacture and provide 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 coupling ration ranging from 1:99 to 50:50. Customized specifications are basically available.

FBT Coupleris 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.

Features of FBT Coupler

Passed Telcordia GR-1221-CORE, and 85℃, 85％RH test up to 1500 hours

Low extra loss

Specifications of FBT Coupler

1×2 Single Mode Coupler(SMC)

Wavelength	nm		1310,1550,1310&1550
Bandwidth	nm		±20，±40
Coupling Ratio			50/50		40/60		20/80		10/90
Grade			P	S	P	S	P	S	P	S
Insertion Loss	dB	Max
Uniformity	dB	Max			/	/	/	/	/	/
PDL	dB	Max
Return Loss	dB		≥50
Operating Temperature	℃		-20～75

1×2 Tap Coupler(WTC)

Wavelength	nm		1550 or on Request
Bandwidth	nm		±20
Coupling Ratio			1/99		2/98		5/95
Grade			P	S	P	S	P	S
Insertion Loss	dB	Max
PDL	dB	Max
Return Loss	dB		≥50
Operating Temperature	℃		-20～75

Three-Windows Couple

Wavelength	nm		1310&1490&1550
Bandwidth	nm		1310±40,1490±10,1550±40
Coupling Ratio			50/50		40/60		20/80		10/90
Grade			P	S	P	S	P	S	P	S
Insertion Loss	dB	Max		4
Uniformity	dB	Max			/	/	/	/	/	/
PDL	dB	Max
Return Loss	dB		≥50
Operating Temperature	℃		-20～75

(TWC)1×N Monolithic Single Mode Couple(MSC)

Wavelength		nm		1310,1550 or on Request
Bandwidth		nm		±20
Coupling Ratio				1×3		1×4
Grade				P	S	P	S
Insertion Loss		dB	Max			7
Uniformity	Max	dB	Max
PDL	Max	dB	Max
Return Loss		dB		≥50
Operating Temperature		℃		-20～75

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