Variable Optical Attenuators
The ILFA series of In-Line Fixed Attenuators is designed for precise optical power adjustment to a desired level. Featuring a fused passthrough fiber design, it ensures high reliability, making it suitable for airborne and space applications. The attenuator provides fixed attenuation levels ranging from 0 dB to 20 dB, with 0.5 dB increments for fine-tuned power control. We offer custom configurations to meet specific application requirements, including different connector types and end-face configurations. PM Panda fiber (PM780-HP, PM980, PM1550, PM1950)
Configuration options
Configure the options below and add your exact build to the enquiry — we confirm the part number and availability.
We confirm the exact part number for your configuration on enquiry.
Wavelength: 780nm · Attenuation: 1dB · Optical Power: 0.5W · Fiber Type: SMF-28 · Package: 3x54 Tube · Fiber Buffer: 0.9mm Tube · Fiber Length: 1.0 m · Connector: FC/APC · Space Application: Non
Application context
Application guidance is tied to the configured wavelength, fiber interface and optical-budget fields for this family.
In-Line Fixed Fiber Attenuator: Optical power control depends on preserving the optical budget through the complete path. The 780nm, 830nm, 980nm, 1060nm, 1310nm, 1410nm, 1550nm, 1990nm, 2000nm wavelength specification sets source and detector compatibility. The fiber/interface entry (SMF-28, SM1950, 780HP, SM800, SM980, Hi1060, PM1550, PM1950, PM1310, PM850, PM980, PM780, MM 50/125μm, MM 62.5μm, 105/125μm, PLMA 10/125) must match the connected components.
In-Line Fixed Fiber Attenuator: Receiver calibration depends on preserving the optical budget through the complete path. The 780nm, 830nm, 980nm, 1060nm, 1310nm, 1410nm, 1550nm, 1990nm, 2000nm wavelength specification sets source and detector compatibility. The fiber/interface entry (SMF-28, SM1950, 780HP, SM800, SM980, Hi1060, PM1550, PM1950, PM1310, PM850, PM980, PM780, MM 50/125μm, MM 62.5μm, 105/125μm, PLMA 10/125) must match the connected components.
System integration
Use these checks to connect In-Line Fixed Fiber Attenuator to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
Technical FAQ
Fiber Type: SMF-28, SM1950, 780HP, SM800, SM980, Hi1060, PM1550, PM1950, PM1310, PM850, PM980, PM780, MM 50/125μm, MM 62.5μm, 105/125μm, PLMA 10/125 · Fiber Buffer: 0.9mm Tube. Specify connector polish and fiber architecture together. FC/PC, FC/APC and SMA interfaces, and single-mode, multimode and polarization-maintaining fibers, impose different return-loss, mode-field and alignment requirements.
Wavelength: 780nm, 830nm, 980nm, 1060nm, 1310nm, 1410nm, 1550nm, 1990nm, 2000nm. Check the Variable Optical Attenuators passband, insertion loss, return loss and power handling at the actual source wavelength; a nominal telecom-band label is not a substitute for the configured range.
Share your wavelength, fiber type, connector, power handling and control requirements and we will qualify the matching configuration and part number.
Model selection
Compare In-Line Fixed Fiber Attenuator with the closest available models in the Variable Optical Attenuators family. Confirm option-dependent values on the final configuration before ordering.
| Selection parameter | In-Line Fixed Fiber Attenuator (current) | High Speed Premium Variable Fiber Optical Attenuator 350-2400nm, 35dB | Large Core Fiber Variable Attenuator USB/RS232 |
|---|---|---|---|
| Wavelength range | 780nm, 830nm, 980nm, 1060nm, 1310nm, 1410nm, 1550nm, 1990nm, 2000nm | 1550nm, 780nm, 850nm, 1310nm, 1060nm | 1240-1620, 1310, 1550, 850 |
| Optical performance | 1dB, 2dB, 3dB, 5dB, 10dB, 15dB, 20dB | Confirm for this model | Confirm for this model |
| Fiber type | SMF-28, SM1950, 780HP, SM800, SM980, Hi1060, PM1550, PM1950, PM1310, PM850, PM980, PM780, MM 50/125μm, MM 62.5μm, 105/125μm, PLMA 10/125 | SMF-28, HI1060, HI780, PM850, PM1550, PM980 | 105/NA.22, 200/NA.22, 300/NA.22, 400/NA.22, 600/NA.22, 800/NA.22 |
| Connector / control | FC/APC, FC/PC | None, FC/APC, Special | USB, RS232 |
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