sales@foscoconnect.com
(510) 319-9878
Silicon Valley, CA, USA
Overview
The ST Attenuator is a high-precision, female-to-female bulkhead component designed for use in singlemode fiber optic networks. It provides a fixed 5dB attenuation level at both 1310nm and 1550nm wavelengths, making it an essential tool for balancing signal strength in high-power optical systems.
Constructed with a wavelength-sensitive neutral density filter, this attenuator ensures accurate and stable performance across standard telecommunications bands. The bulkhead design allows for easy mounting in fiber distribution panels, while the no-flange form factor provides a compact solution for tight spaces within data centers and enterprise network environments.
Key Features
-
Neutral Density Filtering
Utilizes wavelength-sensitive filters to provide precise attenuation levels. -
Singlemode Compatibility
Optimized for 1310nm and 1550nm wavelengths to ensure wide network utility. -
Fixed 5dB Attenuation
Delivers consistent signal reduction for optical link power management. -
Female-to-Female Design
Features standard ST coupling on both sides for direct patch cord integration. -
Bulkhead Mounting
Designed for secure installation within patch panels or enclosures. -
No-Flange Housing
Provides a space-saving profile for high-density fiber management systems.
Applications
- Telecommunications network testing
- Signal power balancing in long-haul transmission
- Data center fiber link management
- Optical equipment protection
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | F18125SF |
| Connector Type | ST Female to Female |
| Mode | Singlemode |
| Wavelength | 1310nm / 1550nm |
| Attenuation Value | 5dB |
| Mounting Style | Bulkhead (No Flange) |
Frequently Asked Questions
What is the primary function of this attenuator?
The ST attenuator is used to reduce the signal power in a fiber optic line to prevent receiver saturation or to balance signal levels between channels.
Is this compatible with multimode fiber?
No, this model is specifically engineered for singlemode fiber applications at 1310nm and 1550nm.
Does this unit include a mounting flange?
No, this is a no-flange model designed for bulkhead installation.
Can this be used for testing purposes?
Yes, it is suitable for test setups requiring controlled optical signal reduction.
Is the attenuation level adjustable?
No, this is a fixed 5dB attenuator.


