Description
1900nm 1×2 2×2 SM Fiber Fused Coupler
1900nm 1×2 2×2 SM Fused Coupler is built with fused biconical taper (FBT) technology, optical signal power can be splitted into two parts with even or various coupling ratio by the FBT Coupler, it’s widely applied in Fiber Laser and fiber optic sensor field, the MM and PM types are available upon request.
| Application: | Features: |  |
| Fiber Laser | Low Excess Loss | |
| Fiber Optic Sensor | High Return Loss | |
| Fiber Amplifier | Low Insertion Loss | |
| Optical Diffraction System | High Reliability |
Specification:
| Parameter | Symbol | Value | Unit |
| Center Wavelength | λ | 1900 | nm |
| Bandwidth | BW | ±15 | nm |
| Max. Excess Loss | EL | 0.8 | dB |
| Coupling Ratio Tolerance | 50±3, 40±2.5, 30±2, 20±1.5, 10±1.5, 5±0.7, 1±0.3 | % | |
| Max. Polarization Dependent Loss | PDL | 0.2 | dB |
| Min. Directivity | 50 | dB | |
| Min. Return Loss | RL | 50 | dB |
| Max. Optical Power (CW) | P | 2 or specify | W |
| Max. Tensil Load | 5 | N | |
| Fiber Type | SMF-28e or SM 1950 fiber | – | |
| Operating Temperature | T | -40~70 | ℃ |
| Storage Temperature | T | -40~85 | ℃ |
| Package Dimension | Φ3×L54 | mm |
| Notice: Above specifications are tested at center wavelength without connector in room temperature @23℃. |
| For devices with connectors, IL will be 0.3dB higher, RL will be 5dB lower. Connectors only 1W CW optical power guarantee. |
Drawing:
Ordering Information (Part Number):
| SMFUC-WWWW-PP-RR-J-LL-CC |
|||||
| WWWW | PP | RR | J | LL | CC |
| Wavelength | Port | Coupling Ratio | Fiber Jacket | Fiber Length | Connector |
| 1900 – 1900nm | 12 – 1×2 | 01 – 1/99 | B – 250um Bare Fiber | 05 – 0.5m | NE – None |
| 1940 – 1940nm | 22 – 2×2 | 02 – 2/98 | 9 – 900um Loose Tube | 10 – 1.0m | FA – FC/APC |
| 1950 – 1950nm | 03 – 3/97 | 2 – 2.0mm Loose Tube | 15 – 1.5m | FU – FC/UPC | |
| 2000 – 2000nm | 05 – 5/95 | 3 – 3.0mm Loose Tube | 20 – 2.0m | SA – SC/APC | |
| 2050 – 2050nm | 10 – 10/90 | SS – Specify | SU – SU/APC | ||
| SSSS – Specify | 20 – 20/80 | LA – LC/APC | |||
| 30 – 30/70 | LU – LC/UPC | ||||
| 40 – 40/60 | SS – Specify | ||||
| 50 – 50/50 | |||||
| SS – Specify | |||||
Example: SMFUC-1900-12-50-9-10-FA is the PN for 1900nm SM Fiber Fused Coupler, 1×2, 50/50, 1.0m SM fiber, 900um loose tube, FC/APC connector