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| Code | 665799 | Type | 5-Axis Fiber Couplers and Accessories | |
| Effective Focal Length | 15mm | Connector Type | FC/PC | |
| AR Coating Range (e) | 1050 – 1700nm | Maximum Beam Waist Distance (ac) | 2068mm | |
| Divergence Angle (Full Angle, a) | 0.693mrad | Input Fiber MFD (b) | 10.4μm | |
| Output Beam Waist Diameter (a) | 2.85mm | Clear Aperture of Lens (d) | 4.5mm | |
| Lens Numerical Aperture (NA) | 0.15 | Lens Material | N-BAF10/N-SF6 | |
| Housing Material | Stainless Steel |
Focal Length
15.0 mm
Connector Type
FC/PC and FC/APC optional
Coating Types
A, B, C coatings available
Fiber Compatibility
Suitable for single-mode fibers
Achromatic Lens
Included
LBTEK five-axis fiber coupler/collimator with 15.0 mm focal length achromatic lens offers three coating options (A/B/C), covering wavelengths from 400 to 1700 nm. With the connector and fiber fixed in place, the internal lens provides five alignment degrees of freedom: linear adjustment in X and Y directions, pitch and yaw angular adjustment, and Z-axis tuning through pitch/yaw coupling.
Travel range in X and Y directions is ±0.7 mm, with a resolution of 317 µm per turn. Z-axis travel range is ±1.0 mm, with a resolution of 200 µm per turn. By loosening the three flat-head screws on the front panel, the connector can be rotated for polarization-maintaining fiber alignment. Once alignment is complete, the X and Y positions can be locked by tightening the side locking screws on the housing. The locking ring on the Zθ adjuster can secure pitch and yaw positions.
Compared with five-axis fiber collimators using aspheric lenses, achromatic lens versions provide smaller focal shift across the supported spectral range (see curve page for comparison). Once the focal length is set, the achromatic version is generally suitable for all wavelengths within the range. However, it also introduces greater spherical aberration compared to aspheric versions.
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