Polarization Maintaining Erbium Doped Fibers
Polarization Maintaining Erbium Doped Fibers
PM Erbium Doped Fiber (F-DHB1500) combines Fibercore’s greatest areas of expertise: Erbium doped fiber and Polarization Maintaining (PM) fiber. It unites the well-established core composition of IsoGain™ Erbium Doped Fiber (EDF), with the highly effective ‘Bow-Tie’ geometry used for polarization maintaining fiber.
- High Absorption for Short Lengths
- PM Design to Maintain Polarization State
- Bow-Tie Configuration See All Features
| Compare | Description | Drawings, CAD & Specs | Avail. | Price | ||
|---|---|---|---|---|---|---|
 | F-DHB1500 Polarization Maintaining Erbium Doped FibersPolarization Maintaining Optical Fiber, Erbium Doped, PM EDFAs |
Features
Bow-Tie Polarization Maintaining Design
The core is flanked by areas of high expansion, boron-doped glass, which shrink back more than the surrounding silica. Tension caused induces birefringence (creating two different indices of refraction: a higher index parallel and a lower index perpendicular to the applied stress).
Cross section diagram of the Bow-Tie Polarization Maintaining Fiber.
High Birefringence
Fibercore uses ‘Bow-Tie’ Stress Applying Parts (SAPs) to create birefringence in the core. The design of these highly efficient SAPs generate very high birefringence without excessive stress, allowing polarization orientation to be controlled effectively across a fiber system. The ‘Bow-Tie’ design is capable of creating more birefringence than any other stressed design. This is simply because it is based on two opposing wedges, the most simple and efficient means of applying stress to a point.
“Bow-Tie” cladding preserves polarization with stress-induced intrinsic birefringence. The fast axis is oriented horizontally.
IsoGain™ Erbium Doped Fiber Design
Fibercore’s IsoGain Erbium Doped Fibers (EDFs) utilize a core composition that has been engineered to generate a substantially flattened wavelength response that closely matches that of other leading fiber types.
Erbium Doped PM Fiber Applications
F-DHB1500 is invaluable in mode-locked fiber lasers, or in any specialized that demand polarization maintenance. With high peak absorption, F-DHB1500 is particularly suitable for small gain length EDFAs and research applications requiring very short active fiber regions.
Resources
Literature
PM Erbium Doped Fiber(790.4 kB, PDF)
