Optical fiber loopback is a medium used to provide a temporary return line for optical fiber signals. It can provide a rich and easy-to-manage optical fiber loop and effectively eliminate bending losses. It is often used in the field of optical fiber testing or network restoration to diagnose problems in optical network equipment. . Sending a loopback test to network devices one at a time is a technique that detects a certain problem individually.

Advantage:

SM IL(G657A1)<0.1dB

SM RL>50dB

Standard MTP connector

Smaller size

Dustproof function

Application:

With 40G 100G optical module

Fiber test

Network repair and diagnosis equipment failure

Test the transmitted optical power and receiving sensitivity

FTTX application

Optical telecommunication

Fiber Optic Loop Back
Style	LC,SC,ST,FC.MU,MPO, SC/APC,FC/APC,LC/APC.MU/APC Duplex MTRJ/Female, MTRJ/Male
Fiber Type	9/125 SMF-28 or equivalent (Singlemode) OS1 50/125, 62.5/125 (Multimode) OM2&OM1 50/125,
10G (Multimode) OM3
Cable Type	Simplex, Duplex (Zipcord) Φ3.0mm, Φ2.0mm, Φ1.8mm Φ1.6mm PVC or LSZH Φ0.9mm, Φ0.6mm buffered fiber
PVC or LSZH
Polishing Manner	UPC, APC (8°& 6°)
Insertion Loss	≤ 0.2dB (For Singlemode Master) ≤ 0.3dB (For Singlemode Standard); ≤ 0.5dB (For Multimode) Tested by JDS RM 3750
Return Loss (For Singlemode)	UPC ≥ 50dB, APC ≥ 60dB (typ.65dB)
Durability	±0.2dB typical change,1000 matings
Interchangeablity	≤ 0.2dB
Operating Temperature	-40°C to 85°C
Storage Temperature	-40°C to 85°C
Geometry Requirement (For Singlemode)	Ferrule Endface Radius 7mm ≤ R ≤ 12mm (For APC) 10mm ≤ R ≤ 25mm (For Standard) Apex Offset ≤ 30 μm (For Master) Apex Offset ≤ 50 μm (For Standard) Undercut -50nm ≤ U ≤ 50nm