8F SM MTP® Loopback Module

This 8-fiber single-mode (SM) MTP® loopback module is a factory-terminated, fully tested optical test accessory designed for data center network commissioning, system verification, port loopback testing, and optical transceiver function validation. The product adopts standard MTP® female connector design, complies with international fiber optic communication standards, and features ultra-low insertion loss, high return loss, stable mechanical performance and excellent environmental adaptability. It is widely applicable to 40G/100G optical network equipment port testing, QSFP+ transceiver loopback verification, and optical link fault diagnosis scenarios.

All modules are 100% optically and mechanically inspected before delivery to ensure consistent and reliable performance in long-term network operation.

Description

Key Features
- 8-core single-mode fiber design, dedicated for MTP® interface port loopback test
- Adopts OS2 9/125μm bend-insensitive single-mode fiber, compatible with G652D/G657A1 international fiber standards
- Ultra-low insertion loss and high return loss, ensuring accurate test results
- Standard MTP® female connector, compliant with TIA/EIA-568 and IEC 61754-7 specifications
- Durable mechanical structure, withstands repeated plug-and-pull operations
- LSZH flame-retardant jacket material, low smoke, halogen-free, fire-resistant, safe for indoor data center deployment
- Wide temperature working range, suitable for harsh indoor and controlled outdoor environments
- RoHS compliant, environmentally friendly and pollution-free
- Factory pre-terminated and fully tested, plug-and-play, no on-site assembly required

Optical Specifications

(Test wavelength: 1310nm / 1550nm, room temperature 25℃)

Parameter	Specification	Test Condition
Fiber Type	OS2 9/125μm Single Mode (G652D/G657A1)	Industrial Standard
Fiber Count	8 Fibers	Fixed
Max Insertion Loss	≤0.75dB (G657A1); ≤1.5dB (G652D)	1310/1550nm
Min Return Loss	≥55dB	1310/1550nm
Polarity	TIA-568 Standard Type B	Industry Standard
Operating Wavelength	1260nm ~ 1625nm (O-band, E-band, S-band, C-band, L-band)	Single Mode Full Band

Mechanical Specifications

Parameter	Specification
Connector Type	MTP® Female (Non-pinned / Pinned optional)
Plug & Pull Durability	≥500 times plug-pull test, insertion loss variation ≤0.5dB
Connector Color	Green (SM APC Standard)

Environmental Specifications

Parameter	Specification
Operating Temperature	-40℃ ~ +85℃ (-40°F ~ 185°F)
Storage Temperature	-50℃ ~ +90℃ (-58°F ~ 194°F)
Relative Humidity	5% ~ 95% (Non-condensing)
Environmental Resistance	Dust-proof, moisture-proof, anti-aging

6 End-Face Geometry (IEC 61300-3-35)

Parameter	Specification
Radius of Curvature (X-axis)	8 – 25 mm
Radius of Curvature (Y-axis)	8 – 25 mm
Fiber Undercut/Protrusion	<= +/- 50 nm
Apex Offset	<= 50 um
Scratch/Dig	20/10 per MIL-PRF-15703B