Optical coupler is also called optical splitter, is one of the most important passive devices in optical fiber link, is with multiple inputs and multiple output end of the optical fiber connected devices. The fiber optic splitter by the light splitting principle can be divided into the fused biconical taper (FBT type) and planar waveguidetype (PLC type).
Performance Specifications
| Type | Singlemode 1xN FBT splitter, optical coupler,Coupling ratio, 50%:50% | ||
| Dual Window | Single Window | Double Window | |
| Central wavelength (nm) | 1310 to 1550 | 1310 or 1550 | 1310/1550 |
| bandwidth(db) | ±20 | ±40 | ±40 |
| Additional loss(db) | ≤0.15 | ≤0.30 | ≤0.30 |
| Insertion loss (db) | ≤3.3 | ≤3.5 | ≤3.5 |
| Min directionality (db) | ≥45 | ≥45 | ≥45 |
| Operating temperature(℃) | -40-- +70 | ||
| Uniformity (db) | Couplers with uniform coupling ratio has this requirement | ||
| Applicant stndard | YD/T 893 | ||
| Grade | P | A | |
Coupling ratio: /Insertion Loss(dB) | 1/99 | ≤22.5/0.25 | ≤23.5/0.35 |
| 2/98 | ≤18.8/0.3 | ≤19.5/0.4 | |
| 3/97 | ≤17.0/0.35 | ≤17.8/0.45 | |
| 5/95 | ≤14.6/0.4 | ≤15.5/0.5 | |
| 10/90 | ≤11.2/0.75 | ≤12.0/0.8 | |
| 20/80 | ≤7.9/1.3 | ≤8.4/1.4 | |
| 30/70 | ≤6.0/1.9 | ≤6.3/2.1 | |
| 40/60 | ≤4.7/2.7 | ≤4.9/2.9 | |
| 50/50 | ≤3.6 | ≤3.8 | |
