mfd conversion fiber array

PRODUCT OVERVIEW

MFD conversion fiber array units (FAUs) provide a means of low-loss coupling to waveguides with smaller mode-fields. The arrays are made using a short section of ultra-high-NA (UHNA) fiber that is spliced to a pigtail of a standard SM or PM fiber. A protective metal tube is placed over the splice and each splice is inserted into a 900µm loose tube. Due to the thermally-expanded core of UHNA fibers, the splice loss to standard fiber is typically less than 0.3dB.

MFD conversion FAUs are commonly made using the following UHNA fibers:

  • Nufern UHNA1 (to SMF-28) - 1100-1600nm; Core NA=0.28; MFD=4.0µm @1310nm (4.8µm @1550nm)

  • Nufern UHNA4 (to SMF-28) - 1100-1600nm; Core NA=0.35; MFD=3.3µm @1310nm (4.0µm @1550nm)

  • Nufern UHNA7 (to SMF-28) - 1500-2000nm; Core NA=0.41; MFD=3.2µm @1550nm

  • Corning HA15-PS-U25D(TEC) (to PM-1550) - Cutoff Wavelength ≤1480nm; MFD=4.0µm @1550nm

SPECIFICATIONS

  • V-Groove Material: Fused Silica, Borosilicate¹

  • Fiber: UHNA spliced to standard SM or PM fiber

  • Channel: 1, 2, 4, 8, or 16 fibers¹

  • Channel Pitch/Spacings: 127µm, 250µm, 254µm¹

  • Standard Size: V-Groove thickness: 1.5mm; Lid thickness: 1.0mm (std.), 0.2mm (thin), or Lidless¹

  • Polish Angle: 0° ("flat"), 8°

  • Polish Angle Direction: Lid-long (LL), Lid-short (LS), or transverse

  • PM Stress Rod Orientation: Vertical or Horizontal (± 3°)

  • PM-ER: ≥ 18dB (≥ 22dB and ≥ 25dB available)

  • Connectors: FC/PC, FC/APC, MT (others available)

  • 2D Configurations: 2-row, Rectangular, Hexagonal

  • Designed to be Telcordia GR-1221 compliant

¹ Custom specifications available

 

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