Features
Low Insertion Loss
High Isolation
Low PDL
Good Directivity
Good Environmental Stability

Applications

Optical Fiber Communication Systems
Optic-fiber Access Networks
Optic-fiber CATV
Optical Fiber Test Equipmentss

Parameters
Type	Standard	High Isolation		Ultra-high Isolation
Center wavelength（nm）	1310 or 1550
Bandwidth（nm）	±15
Max insertion loss（dB）	0.35		0.75		1.0
Min wavelength isolation（dB）	18		30		40
±10nm Bandwidth typical isolation（dB）	20		37		45
Min directivity（dB）	>60
PDL（dB）	<0.1
Operating temperature（℃）	-25~+70
Storage temperature（℃）	-40~+85
Max operating power (mW)	<300
Max tensile strength (N)	>5
Package dimensions (mm)	Ø3.0×50 or Ø4.0×50
Industry standard	Telcordia GR-1221-CORE

The filter is used for selecting one wavelength light from the mixed lights, which will be flittered, in the meantime, letting the other wavelength light pass through. There are two kinds of filters available: 1310nm pass/1550nm stop and 1550nm pass/1310nm stop. We employ FBT technique fabricating standard 1310/1550nm filters; they have good performance and environmental stability in applications, according to the outcome of experiment and customers’ feedback