ST/UPC OS2 Single Mode 9/125 Fiber Loopback Cable
ST/UPC OS2 single-mode fiber loopback cable 9/125μm for network testing, port verification, and optical signal diagnostics.
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Description
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Specification
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Features
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Application
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Custom Service
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FAQ
The ST/UPC OS2 Single Mode Fiber Loopback Cable is a compact diagnostic tool designed for testing and verifying fiber optic network performance. By creating a closed optical loop, it enables signal transmission testing, port verification, and troubleshooting in single-mode systems.
Built with OS2 9/125μm fiber and equipped with precision ST/UPC connectors, this loopback cable ensures low insertion loss and stable signal reflection. It is widely used in telecom networks, data centers, and laboratory environments for equipment testing, network diagnostics, and system validation.
Loopback Modules Choosing Guide
| SKU | Connector | Fiber Count | Fiber Type | Polish |
| FLC-MPO-ASM9-12 | MPO | 12 | OS2 | APC |
| FLC-MPO-MM1-12 | MPO | 12 | OM1 | APC |
| FLC-MPO-MM3-12 | MPO | 12 | OM3 | APC |
| FLC-MTP-ASM9-24 | MTP | 24 | OS2 | APC |
| FLC-MTP-MM3-24 | MTP | 24 | OM3 | PC |
| FLC-MT-MM6 | MTRJ Duplex | 2 | OM1 | UPC/APC |
| FLC-SC-MM3 | SC Duplex | 2 | OM3 | UPC |
| FLC-ST-SM9 | ST | 1 | OS2 | UPC |
| FLM-LC-MM3 | LC Duplex | 2 | OM3 | UPC |
| FLM-SC-MM6 | SC Duplex | 2 | OM1 | UPC |
| Connector Type | ST/UPC |
|---|---|
| Fiber Mode | Single-mode |
| Fiber Grade | OS2 9/125μm |
| Cable Type | Loopback Cable |
| Structure | Simplex Loop |
| Insertion Loss | ≤ 0.3 dB |
| Return Loss | ≥ 50 dB |
| Connector Style | Bayonet |
| Jacket Material | PVC / LSZH (optional) |
| Application | Testing / Diagnostics / Loopback |
| Operating Temperature | -20°C to +70°C |
| Compliance | RoHS |
- ST/UPC single-mode fiber loopback cable
- OS2 9/125μm fiber for long-distance transmission testing
- Compact loopback design for easy handling
- Low insertion loss and stable optical performance
- Bayonet-style ST connector for secure connection
- Durable and flexible cable structure
- Ideal for port testing and signal loopback verification
- Plug-and-play operation without additional setup
- Suitable for lab, field, and production environments
- RoHS compliant environmentally friendly materials
- Fiber optic network testing and troubleshooting
- Equipment port verification (switches, transceivers)
- Telecom and data center diagnostics
- Optical distribution frame (ODF) testing
- System validation and signal loopback checks
- Laboratory and R&D environments
We provide OEM customization including connector types (ST/SC/LC/FC), fiber types (OS2/OM1/OM2/OM3/OM4), cable length, jacket materials, and color options. Custom labeling and packaging services are available to meet project and branding requirements.
Loopback Module Customization Options
| Connector Type | LC, SC, MPO, MTP |
| Fiber Count | Duplex, 8F, 12F, 16F, 24F |
| Fiber Mode | OS2, OM3, OM4, OM5 |
| Connector Polish | UPC, APC |
| MPO/MTP Connector | Male, Female |
| MPO/MTP Polarity | Type A, Type B |
| Housing Material | ABS Plastic, Metal |
| Housing Color | Beige, Aqua, Violet, Lime Green, Black, Custom |
| Typical Applications | Optical Transceiver Testing, Switch Port Diagnostics, Production Testing, Data Center Maintenance |
Q1: What is a fiber loopback cable used for?
A: It creates a signal loop to test transmission and receiving functions of optical devices.
Q2: Why use single-mode OS2 fiber for loopback testing?
A: OS2 fiber supports high-precision, long-distance testing and is commonly used in telecom and backbone networks.
Q3: What devices can be tested with this cable?
A: It is used to test switches, transceivers, network ports, and optical modules.
Q4: What is the advantage of ST connectors?
A: ST connectors use a bayonet locking mechanism, providing a secure and stable connection, especially in legacy systems.
Q5: Is this cable suitable for field use?
A: Yes, its compact and durable design makes it suitable for both field testing and laboratory environments.
