945-70033-11100 AMPHENOL FIBER OPTICS, 945-70033-11100 Datasheet - Page 3

• Manufacturer Part Number: 945-70033-11100
• Description: SC FIBER OPTIC COUPLER, SINGLE MODE
• Manufacturer: AMPHENOL FIBER OPTICS

Specifications of 945-70033-11100

• Fiber Type: Singlemode
• Wavelength Typ: 1550nm
• Body Material: Corning? SMF-28 Fiber
• Coupling Ratio: 50
• Features: 1x2 Port Configuration, Low Insertion Loss, Polarization Insensitive
• Connector Type: SC Fiber Optic
• Rohs Compliant: Yes
• Connecting Termination: 3mm Jacketed Leads, SC/UPC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Fabrication Technology - Fused Biconic Taper (FBT)
Amphenol's coupler product line is designed around the fused biconic taper process (FBT). In the FBT process two fibers are heated,
fused together and then elongated while maintaining precise temperature control. As the fibers are drawn, the individual fiber diameters
and the distance between the two cores are reduced such that the evanescent field of one fiber, carrying an optical signal, extends out-
ward until it starts to overlap the core of the second fiber. At this point, energy will start to transfer to the second fiber. Precise monitoring
of the two output signals allows the process to be controlled and stopped when the desired results have been achieved.
The FBT process provides a high-quality, low-loss coupler with the specific characteristics desired. Keeping the light inside the fiber at all
times provides environmentally reliable and stable performance while keeping the overall optical loss, back reflection and directivity
extremely low. The FBT process has proven to yield couplers with the lowest excess-loss available in the market today.
Definitions
Single Window Broadband Coupler (SWBBC): Single
mode optical coupler where a single device provides a flat wave-
length response at 1310nm +/-40nm or 1550nm +/-40nm.
4.5
3.5
2.5
5
4
3
2
1 4 3 0
1550nm single window 50% coupler
Abr.
CR
EL
IL
D
R
U
Insertion Loss vs. Wavelength
1 4 8 0
Wavelength (nm)
Key Concept
Coupling Ratio
Excess Loss
Insertion Loss
Directivity
Reflectance, Return Loss
Uniformity (50/50 only)
Insertion Loss (IL)
Insertion Loss (IL)
1 5 3 0
Excess Loss
2
3
P
P
1
4
10
10
10
1 5 8 0
*
*
*
log
log
log
10
10
10
P
P
P
Units Description & Definition
P
P
3
1
2
2
1
P
dB
dB
dB
dB
dB
%
1
P
3
2
ratio of one output to sum of all outputs
overall loss from inputs to outputs
full loss at one output [IL = CR + EL]
ratio of power coupled to other ports
ratio of reflected power back to any port
variation in IL values [IL max - IL min]
Wideband Coupler (WBC): Single mode optical coupler
where a single device provides a flat wavelength response at
1310nm +/-40nm and 1550nm +/-40nm.
Coupling Ratio (%)
P
P
P
P
4.5
3.5
2.5
5
2
3
6
Return Loss
5
4
3
2
Directivity
1 2 6 0
10
1 3 1 0
10
P
2
*
*
1310/1550nm WBC 50% coupler
P
log
log
2
P
3
Insertion Loss vs. Wavelength
10
10
© 2001 Amphenol Corp. 9/01 Printed in U.S.A.
*
P
P
P
P
100
6
5
4
1
1 3 6 0
%
Wavelength (nm)
Customer Service 800-944-6446
[e-mail]
www.amphenol-fiberoptics.com
1 4 6 0
1 5 1 0
1 5 6 0