1650nm Bidirectional OTDR FBG Reflector SC/APC at Standard Insertion Loss

1650nm OTDR 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 (1650 +/- 5 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

This reflector is bidirectional, which means the optical signal can be input on both sides of the item.

Direction of Bidirectional 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 Remarks
1 wavelength range Pass band 1260~1625 nm
Reflect band 1645~1655 nm
2 Pass band IL ≤1.4 dB @1260~1360
≤1.4 dB @1460~1610
≤3.4 dB @1610~1625
ORL >35 dB @1260~1360
>35 dB @1460~1580
>32 dB @1580~1610
>20 dB @1610~1625
3 Reflect band IL >21 dB @1645~1655
ORL ≤1.0 dB @1645~1655
4 PDL ≤0.4 dB @1260~1600
5 Ripple ≤0.6 dB @1645~1655
6 TDL ≤0.5 dB @1260~1600
7 Max Optical Power Handling 27 dBm
8 Plug Times >500 Times
9 Connector SC/APC

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