DESCRIPTION
The SC/UPC Single Mode Plug-in Fixed Fiber Optic Attenuator is designed for precise signal management in fiber optic networks. Its robust build and accurate attenuation make it an ideal choice for telecommunication networks, data centers, and FTTH installations. This attenuator offers a simple plug-in male-to-female configuration, enhancing ease of use in a variety of applications.
Feature Details

- Accurate Signal Attenuation: Provides fixed levels of attenuation for consistent network performance.
- Durable and Reliable: Built to withstand frequent use in demanding environments.
- Low Insertion Loss: Ensures high data transmission efficiency with minimal signal loss.
- High Return Loss: Reduces signal reflection, improving overall network stability.
- Flexible Compatibility: Works seamlessly with various single mode fiber systems.
Product Specifications
| Fiber Connector | SC/UPC |
|---|---|
| Transfer Mode | Single mode |
| Connector Gender | Fixed Male to Female |
| Attenuation Range | 0-25dB |
| Attenuation Accuracy | ±0.5dB(1dB-10dB);±1.0dB(11dB-25dB) |
| Available Wavelengths | 1310nm,1550nm,1310&1550nm |
| Wavelength Dependence | <0.3dB Change in insertion loss for 1310-1550nm |
| Return Loss | ≥50dB(UPC);≥60dB(APC) |
| Polarization Dependent Loss | ≤0.2dB |
| Temperature Range | -40-80°C(≤0.2dB in insertion loss) |
| Humidity Range | +/-0.2dB Change in 10% to 90% relative Humidity Range |
| Vibration | ≤0.1dB Change between 10Hz to 55Hz |
| Drop | +/-0.2dB after 8 drops from 1.8meters onto a hard surface |
| Maximum Optical Input Power | 200mW |
Application Details

- Telecommunication Networks: Manages signal strength for improved network reliability.
- Data Centers: Ensures balanced optical signals for efficient data handling.
- FTTH Installations: Prevents signal overload in residential fiber networks.
- Optical Distribution Frames: Supports precise signal management in complex network systems.
Selection Notes
- Typically selected when an SC/UPC single-mode link needs a fixed, known attenuation value (up to 25 dB) to prevent receiver overload or to normalize power levels during commissioning/testing, using a male-to-female plug-in format for quick insertion at ODF/patch points.
- May not be appropriate when the attenuation target, wavelength plan (1310/1550), or the site’s SC/UPC vs SC/APC convention isn’t clearly defined, since an incorrect fixed value or polish mismatch can under-power the receiver or hide underlying link issues during troubleshooting.
FAQ
Q1: What is the purpose of a fixed fiber optic attenuator?
It reduces optical signal power by a defined value to protect receivers and stabilize network performance.
Q2: What attenuation values are available?
Standard fixed attenuation options range from 1 dB up to 25 dB.
Q3: Is this attenuator designed for single-mode fiber only?
Yes, this model is intended for single-mode fiber applications.
Q4: How is the attenuator installed?
It features a male-to-female plug-in design and installs directly into an SC/UPC adapter port.
Q5: Can it be used in FTTH networks?
Yes, it is commonly used to control signal levels in FTTH access networks.
Q6: What is the maximum optical input power supported?
The attenuator supports optical input power up to 200 mW.
Q7: Where is this attenuator typically applied?
It is widely used in telecom networks, data centers, FTTH systems, and optical distribution frames.







