Our periscope lensed fiber arrays (PLFAs) are v-groove optical fiber arrays with 3D printed periscope lenses at the ends of the fibers. The periscope lenses allow the 90 degree coupling of light, which is often used in wafer level testing of photonic integrated circuits (PICs) or other optical components. The printed microlenses can focus or collimate the light from the fibers, enabling mode field conversion or coupling over larger distances.
The high-precision 3D printing of lenses is performed on our Nanoscribe Quantum X Align tool. This additive manufacturing process offers many advantages over traditional, subtractive, methods of creating lensed or tapered fibers, such as:
- High positioning accuracy relative to the fiber core.
- Full control over lens design parameters, such as asphericity for aberration correction.
- The ability to print directly onto existing surfaces, enabling more options for light coupling.
The table below shows the correlation between wavelength, mode field diameter, working distance, and lens height.
| Lens type | Wavelength (nm) | Mode field diameter (µm) | Working distance (µm) |
| Collimating 211 | 460 | 22 | 100 |
| 520 | 25 | ||
| 620 | 24 | ||
| 780 | 30 | ||
| 1060 | 30 | ||
| 1310 | 25 | ||
| 1550 | 26 | ||
| Collimating 220 | 1550 | 30 | 50 |
| Collimating 230 | 1550 | 20 | 250 |
| Focusing 60 | 1550 | 10 | 35 |
| Focusing 97 | 460 | 1.7 | 29 |
| 520 | 1.9 | 29 | |
| 620 | 2.2 | 29 | |
| 780 | 2.4 | 31 | |
| 1060 | 3.1 | 30 | |
| 1310 | 3.4 | 25 | |
| 1550 | 3.6 | 25 | |
| Focusing 190 | 1550 | 15 | 190 |
If you still can’t find the configuration you’re looking for or have special requests, please fill out our custom lensed fiber array form. We will get back you you with a price and lead time.
