Newsroom
What is a Passive Fiber Fiber?
A passive fiber is an optical fiber that guides and transports light without providing optical gain. Unlike an active (doped) fiber, its core does not contain rare-earth dopants designed to amplify the optical signal.
Passive fibers are used to deliver pump light, transport optical signals, and connect different stages of photonic systems. They can be designed with different core sizes, polarization properties, coatings, and cladding structures depending on the application and operating environment. Exail's passive fiber range includes single-mode, multimode, polarization-maintaining, photosensitive, and double-clad fibers.
HOW a Passive Fiber Works
The operation of a passive fiber can be understood through three main steps:
Light coupling
An optical signal or pump beam is coupled into the fiber core.
Light guidance
The fiber guides the light along its length through the difference in refractive index between the core and cladding, without amplifying the signal.
Signal delivery
The guided light is delivered to another component or stage of the photonic system, such as an amplifier, laser cavity, sensor, or detection system.
