The Fiber optic reflector is an important device in the field of optical communication link detection. It uses FBG technoly and is located at all the optical network unit (ONU) side of a passive optical network (PON), which will reflect the test signal from the OTDR at the optical line terminal (OLT) side, while the traffic signal of PON system will pass through the reflector with very little loss. The principle is the equivalent of a bandpass filter, which completely reflects light from one specified wavelength while all other wavelengths pass through.
The 1550nm OTDR reflector is used to help to increase the sensitivity of the OTDR for checking the optical continuity of a subscriber and troubleshooting.
Specifications of 1550nm SC/APC FBG reflector
Parameter |
Unit |
Value |
Pass band wavelength range |
nm |
1260~1360 & 1460~1520 & 1575~1670 |
Reflect band wavelength range |
nm |
1545~1555 |
IL(1260nm-1360nm) |
dB |
≤1.5 |
IL(1460nm-1520nm) |
dB |
≤2 |
IL(1545nm-1555nm) |
dB |
≥20 |
RL(1260nm-1360nm) |
dB |
≥35 |
RL(1460nm-1520nm) |
dB |
≥30 |
RL(1575nm-1670nm) |
dB |
≥30 |
RL(1545nm-1555nm) |
dB |
≤1 |
PDL |
dB |
≤0.4 |
Ripple(REFLECT BAND) |
dB |
≤0.6 |
TDL |
dB |
≤0.5 |
Operation Temperature |
℃ |
-20~+65 |
Relative Humidity |
%RH |
5~95 |
Connector |
SC/APC or LC/APC Attenuator Type |