(High OH)
Copper-coated step index multimode optical fibers have all the benefits of silica fibers. Additional significant improvements include increased mechanical strength and greater fatigue resistance compared to non-hermetic and polymer-clad fibers (PCS). Their transmittance covers a spectral range of 250 to 1200 nm, and also remains stable in corrosive chemicals that normally react to silica glass. The temperature range is from -196C to +600C . Hermetically metal-coated optical fibers are the optimum candidate when used in high vacuum and harsh environmental conditions.
FEUTURES:
-Greatly enhanced resistance to high power laser radiation.
-Higher core-to-clad ratio and enlarged NA optimized for coupling to high-energy lasers.
-Better fiber cooling due to the heat-conducting metal coating.
-Excellent mechanical strength and flexibility compared to polymer coated fibers.
-The metal coating can be soldered and will not outgas.
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Copper-coated gradient index multimode silica fibers | ОК-50/125Cu-Gr | ОК-50/200Cu-Gr | ОК-100/140Cu-Gr |
| Fiber type | Multimode | Multimode | Multimode |
| Index profile | Gradient | Gradient | Gradient |
| Core diameter, µm | 50 ± 2.5 | 50 ± 2.5 | 100 ± 2 |
| Clad diameter, µm | 125 ± 3 | 200 ± 3 | 140 ± 2 |
| Coating diameter, µm | 160 ± 10 | 250 ± 10 | ~ 210 ± 10 |
| Cladding offset, % | < 3 | ||
| Coating offset, % | < 5 | ||
| Attenuation at 850/1300 nm1, dB/km | ~ 13 | ~ 5 | ~ 15 |
| Wavelength range, nm | 1000 - 1600 | ||
| Coating material | Copper 99,99% | ||
| Core material | Silica Ge-doped | ||
| Clad material | Pure silica | ||
| Additional inner layer | Carbon | ||
| Numerical Aperture (NA) | 0.2 ± 0.02 | ||
| Short-term bending radius | 60 times the fiber diameters | ||
| Long-term bending radius | 120 times the fiber diameters | ||
| Proof test, kpsi | 100 | ||
| Min operating temperature2,3, C | -196 | ||
| Max operating temperature (short time < 60s)2, C | 600 | ||
| Max operating temperature (long time > 60s)2, C | < 400 | ||
| Permissible rate of temperature change in the temperature range, C/min | 5 | ||
2- in inert environment
3- at the minimum operating temperature, the integrity of the optical fiber is guaranteed
