Passive Double-Clad Fibers
Passive double-clad fibers made of pure quartz glass are primarily used as pump fibers. Depending on doping, core diameter, and numerical aperture, they are suitable for various applications.
All-Silica Double-Clad Fiber SMM900
The SMM900 combines the properties of single-mode (SM) and multimode (MM) fibers in a multimode design. In the passive double-clad fiber, the SM germanium-doped quartz glass core is surrounded by a silica cladding through which the pump beam is transported. The outer cladding made of fluorinated silica eliminates the need for a polymer coating with a low refractive index. The fiber can be processed like a standard telecom fiber but is considerably more resistant.
Pump Fibers DC1060 and DC 1500 with a Low Refractive Index
At wavelengths of 1060 nm and 1050 nm, passive double-clad fibers with a low refractive index can be used for fiber lasers, pump combiners, amplifiers, and sensor applications, for example.
For a wavelength of 1060 nm, DC1060(10/125)0.08HD offers high non-linear thresholds with a core diameter of 10 µm and a numerical aperture of 0.08, as well as significant power control advantages.
DC1500(6/125)0.21HD and DC1500(11/125)0.12HD fibers and erbium/ytterbium-doped fiber amplifier make it possible to produce highly effective high-performance amplifiers at 1050 nm.
All fibers are surrounded by a fluorinated acrylic cladding with a low refractive index. Attenuation characteristics and mechanical resilience meet all Telcordia 85°C/85% moisture test criteria.
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