Copper-coated step index multimode silica fibers (Low OH)

High strength metal-coated silica fibers

Copper-coated step index multimode optical fibers have all the benefits of silica-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 400 to 2200 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.

 

 

 

 

 

 

 

                              

 

 

 

 

Attenuation spectrum

 

Fiber Specifications:

Copper-coated step index multimode silica fibers -50/125Cu -110/125Cu -200/220Cu -300/330Cu
-400/440Cu 
-600/660Cu
-800/880Cu
Fiber type Multimode Multimode Multimode Multimode Multimode Multimode Multimode
Index profile step step step step step step step
Core diameter,  µm 50 ± 3 113 ± 2  200 ± 2 300 ± 4  400 ± 5  600 ± 8  800 ± 10 
Clad diameter, µm
125 ± 3
125 ± 2
220 ± 2
330 ± 4
440 ± 5 660 ± 8 880 ± 10
Coating diameter,  µm 160 ± 10 160 ± 10 280 ± 10 420 ± 10 545 ± 10 775 ± 10 980 ± 10
Cladding offset, % < 2
Coating offset, % < 5
Attenuation at 800/1300 nm1, dB/km (See grapf  Low OH) 14 the loss spectrum in the long wavelength region ( > 1um) is higher than that of the material  the loss spectrum is close to the material loss spectrum
Wavelength range, nm (See grapf Low OH) 1000 - 1600  400 - 1100  400 - 1700  400 - 2200 
Coating material Copper 99,99%
Core material Pure syntetic silica (low OH)
Clad material Doped silica (F-doped)
Additional inner layer Carbon
Numerical Aperture (NA) 0.16 ± 0.02 0.22 ± 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

1- under normal climatic conditions

2- in inert environment

3- at the minimum operating temperature, the integrity of the optical fiber is guaranteed

Copper-coated step index multimode silica fibers (Low OH)