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PROFA™    Pitch Reducing Optical Fiber Array

The Pitch Reducing Optical Fiber Array (PROFA) is a high density, multi-channel optical input/output (I/O) for fiber-to-chip and fiber-to-optical waveguide applications, featuring:

  • Dramatically reduced channel spacing
  • Scalable channel count
  • All-glass structure that is fully in-fiber and fabricated in a scalable, semi-automated production process
  • Customizable: wavelength, mode field size, channel spacing, array configuration (linear and 2D), fiber type

Pitch Reducing Optical Fiber Array (PROFA)


An exemplary 1550 nm, singlemode, 61-channel PROFA, shown above, retains the pigtail fibers’ NA at the coupling endface while greatly reducing the channel pitch, or spacing, at the tapered end. Typical PROFA specifications are:

  61-channel PROFA 7-channel PROFA
Average positional error of each channel (from perfect hexagonal pattern) < 1 μm < 0.3 μm
Average insertion loss through each channel < 0.3 dB < 0.3 dB
Channel crosstalk < -40 dB < -40 dB

These NA maintaining PROFAs build on Chiral Photonics’ Spot-Size Converters (SSCs) but enable high density, arrayed couplers with relaxed alignment tolerances because of the larger mode field sizes accommodated. Angle-polished endfaces as well as low profile form factors can be accommodated.

Please contact us to discuss your specific needs for applications such as:

  • Fiber-to-chip I/O (waveguide, VCSEL, photodiode)
  • Printed circuit board optical interconnects – backplanes and cards
  • Multicore fiber fanouts
  • High density connectors
  • Incoherent / coherent power combiners
  • Multichannel optical pump / signal combiners
  • MEMS-based switches


All information contained herein is believed to be accurate and is subject to change without notice. No responsibility is assumed for its use. Chiral Photonics, Inc., its subsidiaries and affiliates, or manufacturer, reserve the right to make changes, without notice, to product design, product components, and product manufacturing methods. Some specific combinations of options may not be available. Please contact Chiral Photonics, Inc. for more information.

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