Single Mode Standard & Dual Windows Coupler
FBT is a method of bringing two (or more than two) optical fibers with coated layers together in a certain way, melting under high temperature heating, and stretching to both sides at the same time, and finally forming a special waveguide structure in the form of a double cone in the heating area to realize the transmission of optical power coupling. From the port is divided into: X coupler, Y coupler, star coupler, tree coupler. From the conduction mode can be divided into single-mode couplers, multi-mode couplers.
Product Features：
- Low Excess Loss
- Various Coupling Ratio
- Compact Size
- High Stability and Reliability
Product Application：
- Long-haul Telecommunications
- CATV Systems
- Fiber optic Sensors
- Local Area Networks
- FTTH & LAN
Product Parameters：
|
Parameter |
Unit |
Single window |
Dual window |
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|
P Grade |
A Grade |
P Grade |
A Grade |
||
|
Operating Wavelength |
nm |
850, 980, 1310, 1550 and wideband or Customized |
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|
Coupling Ratio |
% |
50/50 |
50/50 |
50/50 |
50/50 |
|
Excess Loss (Typical) |
dB |
0.15 |
0.2 |
0.15 |
0.2 |
|
Maximum Insertion Loss |
dB |
3.4 |
3.5 |
3.6 |
3.8 |
|
Uniformity |
dB |
N/A |
N/A |
0.7 |
1 |
|
Polarization Sensitivity |
dB |
0.1 |
0.15 |
0.1 |
0.15 |
|
Coupling Ratio |
% |
1~50 |
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|
Directivity |
dB |
≥55 |
|||
|
Operating Temperature |
℃ |
-20 to +85 |
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|
Storage Temperature |
℃ |
-40 to +85 |
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|
Fiber Type |
|
Corning SMF-28E+(LL), DS Fiber or flexcore |
|||
|
Fiber Length |
m |
1 meter each end |
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|
Port Configuration |
|
1x2 or 2x2 |
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|
Package Dimension |
mm |
Φ5.5xL30 |
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|
Coupling Ratio |
Insertion Loss (dB) |
|||
|
|
Single window |
Dual window |
||
|
|
P Grade |
A Grade |
P Grade |
A Grade |
|
40/60 |
4.5/2.5 |
4.6/2.8 |
4.7/2.7 |
5.0/2.9 |
|
30/70 |
5.6/1.85 |
6.0/2.0 |
6.0/1.9 |
6.4/2.1 |
|
20/80 |
7.5/1.2 |
7.7/1.3 |
7.5/1.3 |
8.5/1.4 |
|
10/90 |
11.0/0.6 |
11.5/0.8 |
11.0/0.6 |
12.0/0.8 |
|
5/95 |
14.2/0.4 |
14.6/0.5 |
14.0/0.4 |
14.6/0.43 |
|
1/99 |
21/0.2 |
21.5/0.3 |
22.5/0.25 |
23.0/0.35 |
