24F MPO Loopback

Function: Tests transmit/receive of 40G/100G parallel optics networks; connects MPO TX/RX for IL testing
Features: Supports SM/MM fibers; female/male MPO connectors; compatible with 40G QSFP+/100G CXP/CFP; factory-tested, compact
Specs: Insertion Loss (MM＜1.2dB, SM(G652D)＜1.5dB, SM(G657A1)＜0.75dB); Return Loss (SM＞55dB, MM＞25dB); Temp: -40℃~+80℃; Size: 60mm×20mm
Polarity & Application: 12-fiber (40G: 4 lanes) / 24-fiber (100G: 10 lanes); for MPO transceiver testing & data center use

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Product Description
Specification
Product Advantage

Product Description

1. Product Overview

24-Fibers MPO Fiber Loopback Module provides a looped signal for testing transmit and receiving functions. It is widely used in testing environments, especially for parallel optics 40G and 100G networks. It links TX and RX positions of MPO transceiver interfaces, facilitating insertion loss (IL) testing of optical network segments when connected to MPO trunks or patch leads. This module enables verification and testing of MPO interface transceivers, including 100GBASE-SR10 CXP/CFP devices. It is designed for burn-in and testing of MPO network components and systems, with compact packaging for high-density applications.

2. Key Features

• Supports singlemode (9/125) and multimode (50/125, 62.5/125) fiber types

• Available with 12-fiber or 24-fiber ferrules

• Female and male MPO connector options

• Selectable polarity variants

• Compatible with 40G QSFP+ and 100G CXP/CFP transceivers

• Factory terminated and fully tested MPO interface

• Superior optical and mechanical performance

• Compact, rugged housing for high stability and reliability

Specification

3. Optical & Mechanical Specifications

Item	Parameter
Fiber Type	Singlemode or Multimode
Fiber Diameter	9/125 μm, 50/125 μm, 62.5/125 μm
Insertion Loss	Multimode ＜ 1.2 dB<br>Singlemode (G652D) ＜ 1.5 dB<br>Singlemode (G657A1) ＜ 0.75 dB
Return Loss	Singlemode ＞ 55 dB<br>Multimode ＞ 25 dB
Insert-Pull Test	500 cycles, IL variation ＜ 0.5 dB
Operation Temperature	-40 ℃ ~ +80 ℃
Tensile Resistance	15 kgf
Dimensions	60 mm × 20 mm

4. Polarity & Channel Alignment

• 12-fiber MPO: For 40G applications, 4 lanes at 10G per lane, using 8 fibers (4 transmit, 4 receive)

• 24-fiber MPO: For 100G applications, 10 lanes at 10G per lane, using 20 fibers (10 transmit, 10 receive)

5. Typical Applications

• Co-located with 40G / 100G MPO interface transceivers

• Testing transmission capability and receiver sensitivity of optical network equipment

• Data center optical link validation and component burn-in

Product Advantage

1

Suitable for 40G/100G parallel optics networks, facilitating efficient transmit/receive testing
2

Supports both singlemode (SM) and multimode (MM) fibers for versatile application
3

Offers female and male MPO connector options with selectable polarity
4

Compatible with 40G QSFP+ and 100G CXP/CFP transceivers
5

Factory-terminated and tested, ensuring reliable optical and mechanical performance
6

Compact and rugged housing, with stable performance and small size (60mm×20mm)