The Polarization Maintaining Fused Coupler offers very low insertion loss, high polarization extinction ratio and excellent environmental stability. Accurate coupling ratios from 0.01/99.99 to 50/50 are available with very good uniformity at center wavelength. These components find extensive applications to perform power splitting and mornitoring functions in all kinds of optical communication systems.
Product Detail
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Key Features |
Applications |
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Wavelength 488 - 2100 nm Available |
Power Monitoring |
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Coupling Ratio from 0.01/99.99 to 50/50 Available |
Coherent Communication |
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Operating on both Fast and Slow Axis |
Fiber Gyroscope |
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Low Excess Loss |
Fiber Laser |
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High Power Handling |
Fiber Amplifier |
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High Stability and Reliability |
Test Equipment |
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Specifications |
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Parameter |
Unit |
Value |
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Center Wavelength (λc) |
nm |
488, 532, 635 |
780, 830 |
980, 1064 |
1310, 1480, 1550 |
1700, 2000 |
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Operating Wavelength |
nm |
λc ± 5 |
λc ± 10 |
λc ± 10 |
λc ± 20 |
λc ± 20 |
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Typ. Excess Loss |
dB |
0.8 |
0.5 |
0.4 |
0.2 |
0.5 |
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Max. Excess Loss |
dB |
1.2 |
0.8 |
0.6 |
0.4 |
0.8 |
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Min. ER1, 2, 3 |
dB |
18 |
18 |
20 |
20 |
20 |
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Max. Excess Loss for each connector |
dB |
1.5 |
0.7 |
0.5 |
0.3 |
0.3 |
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Max. Optical Power (Continuous Wave)4 |
W |
2 |
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Thermal Stability |
dB/℃ |
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≤ 0.005 |
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Min. Return Loss5 |
dB |
50 |
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Min. Directivity |
dB |
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50 |
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Fiber Type for Signal Port |
- |
PM Panda Fiber |
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Fiber Type for Tap Port |
- |
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PM Panda Fiber or Singlemode Fiber |
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Operating Temperature |
℃ |
- 5 to + 70 |
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Storage Temperature |
℃ |
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- 40 to + 85 |
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Coupling Ratio & Its Tolerance6 |
- |
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Coupling Ratio |
% |
1/99 |
2/98 |
5/95 |
10/90 |
20/80 |
30/70 |
40/60 |
50/50 |
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Max. Coupling Ratio Tolerance, λc |
% |
± 0.3 |
± 0.5 |
± 0.7 |
± 1.0 |
± 2.0 |
± 2.0 |
± 2.5 |
± 3.0 |
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Coupling Ratio |
% |
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0.1/99.9 |
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0.01/99.99 |
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Tap Ratio Tolerance, λc |
dB |
30 ± 3 |
40 ± 4 |
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1ER data listed in the table are for the ports with coupling ratio greater than 10%. It will be 2 dB lower for a tap port with coupling ratio between 1-10%. For 1% tap port, ER is not considered.
2ER will be 2 dB lower for Nufern FUD-3460 fiber and Nufern PM 1950.
3ER is 2 dB lower for each connector added. Connector key is aligned to slow axis.
4The Optical Power is 1 W only for connector added. For visible wavelength, the limit is 50 mW.
5RL is 5 dB lower for connector added.
6Data tested at central wavelength only.
