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Chiral Photonics, Inc.
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  5. Model PROFA - Pitch Reducing Optical ...

Model PROFA -Pitch Reducing Optical Fiber Array – Two-Dimensional (2D)

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Pitch Reducing Optical Fiber Arrays (PROFAs) provide low loss coupling between standard optical fibers and photonic integrated circuits. Unlike typical fiber arrays, they also provide high density coupling that minimizes the valuable chip real estate needed for optical input/output (I/O). They can provide spot size conversion between small cross-section, chip-based waveguides and standard optical fibers. Two-dimensional (2D) PROFAs are used for chip surface coupling to vertical grating couplers with mode field diameters of approximately 6 or 10 µm or to chip-based devices such as VCSELs or photodiodes. Standard 2D PROFAs are available as hexagonal lattice arrays with up to 61 channels. One-dimensional (1D) PROFAs (see separate PROFA1D datasheet) are available in standard linear arrays of one to six channels and are typically used for chip edge coupling to waveguides with approximately 2 µm diameter mode field sizes.

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packaging integrity

Form Factor/High Density: Typical lenses cannot be packed closer than 125 microns, compromising the inherent density achievable on-chip. This advantage becomes even more compelling when an arrayed interconnect is of interest.

Polarization: Many waveguides are polarization sensitive and maintaining polarization through a lens to small waveguides is challenging if not impossible. Currently only PROFA2Ds are available in SM versions. Speak to us about your PM PROFA2D needs.

Robust connection: PROFAs are intended to be butt coupled or surfaced coupled. Eliminating the air gap minimizes the effects of thermal excursions in the package and dust that can make its way into the optical path. The monolithic all-glass construction enables sealing via adhesives or glass or solder (with metallization) for hermiticity, as needed.

Cost: In addition to performance advantages, the PROFA is competitively priced in volume quantities.

PROFAs are also used within coupled and packaged solutions that Chiral Photonics can provide.

For your photonic integrated circuit packaging needs, please be sure to contact us for our Optical Coupling & Packaging Design Guide which contains packaging recommendations to assist in your design work. To request a copy, send an e-mail to OptDesignGuide@chiralphotonics.com.

  1. Other wavelengths available upon request.
  2. Measured as 1/e2 intensity. Other mode field sizes available upon request.
  3. Measured from fiber pigtail to device tip, per channel.
  4. Intrinsic to device.
  5. Typical array is hexagonal. Other lattice arrays have been accommodated. Larger channel counts can also be accommodated.
  6. Other channel spacing sizes can also be accommodated.
  7. ‘Measured error for PROFA relative to “perfect array” channel position. Will be dependent on array size and pitch.
  8. Other pigtails, connectorization and other pigtail lengths available upon request.
  9. Please speak to us about your custom package and splicing needs.