Ocean Optics S2000 - Manual (Page 90)

Splice Bushings, Bulkhead Fittings
Splice bushings are used to couple two SMA-terminated fibers together. Simply screw each fiber into the splice
bushing finger-tight. Bulkhead fittings are used to fixture a fiber onto a panel. Install the bulkhead by drilling a
hole in the wall where you wish to mount the fiber. Fasten with the lock washer and nut provided.
Solarization-resistant Fibers
If you are using a UV light source, the UV radiation degrades the silica in a standard patch cord over time,
resulting in increased absorption and invalid data. The degradation is called solarization. The active part of our
solarization-resistant fibers consists of a silica core, surrounded by a silica cladding material. Then the fiber is
coated in aluminum, which prevents the fiber from solarizing.
Optical Fiber Color Codes
All Ocean Optics optical fibers are color-coded for simple identification. There are two color bands on one end of
the fiber. The color band nearest the termination identifies the fiber type (i.e., its wavelength optimization), and is
either white (UV/VIS) or black (VIS/NIR). The second color band identifies the diameter of the fiber, and is one of
several different colors. Use the table below as a handy reference.
* The 300
µ
m optical fiber is a solarization-resistant
fiber for applications <250 nm.
Specifications
Optical Fiber Assemblies
- 90 -
Purple
Blue
Green
Yellow
Gray*
Red
Brown
Clear
Core Diameter (
µµ
m)
8 (VIS/NIR only)
50
100
200
300
400
600
1000
White
Black
Fiber Type
UV/VIS
VIS/NIR
Band Color Band Color
Jacket:
Acrylate (temperature range -40
°
to 100
°
C), for 50
µ
m optical fibers
Nylon (temp range -40
°
to 100
°
C), for 100, 200, 400, 600 and 1000
µ
m optical fibers
Aluminum (temp range -269 ° C to 400 ° C), for 300 µ m solarization-resistant fibers
Sheathing/cabling:
PVC with Kevlar reinforcement (standard)
PVC Monocoil (optional)
BX flexible metal sleeve (optional)
Connector/termination: SMA 905
Fiber core: pure fused silica
Cladding: doped fused silica
Fiber profile: step-index multi-mode
Operating wavelengths:
UV-VIS (200-750 nm)
VIS-NIR (450-1000 nm)
Numerical aperture: 0.22
Recommended minimum
bend radius: momentary = 200x the fiber radius (for standard patch cords)
long term = 400x the fiber radius (for standard patch cords)