1577nm XGSPON FBG Reflector SC/APC


The FBG reflector is a standard SC type connector structure, which package a special FBG in the ceramic ferrule.
The fiber bragg grating reflector is a low-cost specific band reflector mounted on the optical network unit (ONU) side. It can reflect light pulses (1577 +/- 2 nm) from the OTDR on the fiber line terminal (OLT) side nearly 100%, while the working bands of the passive optical network (PON) are transmitted normally. The OTDR can determine whether the fiber line is normal by detecting the signal reflected by the fiber grating reflector. When the reflected signal is lower than the normal value, the line loss is too large; when the reflection value is 0, the optical fiber line is broken. Therefore, we can maintain the fiber line in time by the real-time monitoring of the fiber line.

Detection and maintenance of Passive Optical Network lines (applied to FTTx).

Application of OTDR FBG Reflector


  • High stability and reliability
  • Remote real-time detection
  • Low insertion loss
  • Easy connection foradapter structure
  • Compliant with Telcordia GR-326-CORE, Telcordia GR-1221-CORE
  • Compliant withRoHS
Optical parameter:
Item Parameter Specification Unit
1 wavelength range Pass band 1260~1565 nm
Reflect band 1575-1581 nm
2 1260-1360nm 1460-1550nm IL ≤1.2 dB
RL >35 dB
3 1550-1560nm IL ≤1.5 dB
RL >25 dB
4 1560-1565nm IL ≤3.0 dB
RL >20 dB
5 Reflect band IL >21 dB
RL ≤1.0 dB
6 PDL ≤0.4 dB
7 Ripple ≤0.6 dB
8 TDL ≤0.5 dB
9 Connector SC

The FBG reflector adopts a standard SC connector structure, and its external dimensions are as follows: 

Dimension of SC OTDR FBG Reflector
Working/storage Conditions:
Parameter Specification Unit
Working temperature -25 ~ +65 °C
Working humidity 5~95 %RH
Storage temperature -40 ~ +85 °C
Storage humidity 5~95 %RH