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| Code | 665753 | Type | 5-Axis Fiber Couplers and Accessories | |
| Effective Focal Length (EFL) | 4.6mm | Connector Type | FC/APC & FC/PC Compatible | |
| AR Coating Range | 1050 – 1700nm | Maximum Beam Waist Distance (ac) | 1710mm | |
| Divergence Angle (Full Angle, a) | 2.21mrad | Input Fiber Mode Field Diameter (MFD, b) | 10.4µm | |
| Output Beam Waist Diameter (a) | 0.89mm | Clear Aperture of Lens (d) | 4.8mm | |
| Lens Numerical Aperture (NA) | 0.5 | Lens Material | D-ZK3 | |
| Housing Material | Stainless Steel |
Focal Length: 4.6 mm
Connector Type: FC/PC interface (compatible with FC/PC & FC/APC connectors)
Coating Options: A Coating, B Coating, C Coating
Applicable Fiber Type: Single Mode Fiber
The LBTEK 5-axis fiber coupler/collimator with a 4.6 mm aspheric lens is available with A/B/C coatings, covering a wavelength range from 350 nm to 1700 nm. While keeping the connector and fiber fixed, the built-in lens offers five alignment degrees of freedom: X and Y linear translation, pitch and yaw angular adjustment, and Z-axis movement via pitch/yaw combination.
The XY adjustment range is ±0.7 mm with a resolution of 317 µm per turn. The Z-axis adjustment range is ±1.0 mm with a resolution of 200 µm per turn. For PM fiber alignment, the connector can be rotated by loosening the three flat-head screws on the front panel. Once alignment is complete, the side locking screws secure the XY position, while the locking ring on the Zθ adjuster fixes the pitch/yaw orientation.
For focal lengths ≤7.5 mm, the FC/PC version is compatible with both FC/PC and FC/APC connectors, as the combination of short focal length and 5-axis alignment minimizes off-axis deviation.
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