SDM Imaging

Goals

To determine if Space Division Multiplexing (SDM) is being used in any imaging applications to be able to evaluate a new technology and understand its applicability in SDM approaches and use academically and commercially (e.g. biomedical imaging, industrial non-destructive testing imaging).

Early Findings

SDM in Imaging Applications

  • A 2013 study used Space Division Multiplexing (SDM) technology to conduct optical coherence tomography (OCT) imaging of scotch tape, drosophila larva and drosophila larva heart, at 400 x 605 A-scans in 0.37 seconds.
  • OCT is considered as an emerging biomedical technology that "relies on detection of intrinsic optical contrast" and "provides label-free and depth-resolved images with micron-scale spatial resolution and sub-millisecond temporal resolution".
  • It was found that this technology "provides a new orthogonal dimension to improve OCT imaging speed" as well as favorable cost scaling. Imaging speed of 800,000 A-scans/s was achieved with the use of "a 100,000 Hz tunable vertical cavity surface-emitting laser (VCSEL)".
  • A 2015 study found that SDM technology can be used to modify optical frequency domain imaging (OFDI), making it possible to "[perform] parallel imaging of three-dimensional (3D) surface profiles...[using] dual-area swept sourced beams".

Events

  • The 24th International Conference on Optical Network Design and Modeling will be held in Castelldefels, Barcelona, Spain, starting May 18th through to the 21st, 2020.
  • An invited speaker to this conference is Noboru Yoshikane, of KDDI Research Inc. He will be discussing research about SDM "as an upcoming technology for ultra-large capacity optical networks". This suggests that this technology is still mainly being used in optical fiber transmission.

Summary

  • There is an abundance of information pertaining to space-division multiplexing or spatial division multiplexing and its use in optical fiber transmission or telecommunication, but there is very limited information specific to its use in imaging applications.
  • In fact, what we found in our research was its use in imaging applications in academic research. We did not find such information or examples for commercial use in our first hour of research.
  • SDM technology is being leveraged to improve imaging speed for OCT and to create "parallel imaging of [3D] surface profiles".
  • In addition to this public search, we scanned our proprietary research database of over 1 million sources and were unable to find any specific research reports that address your goals.

Proposed next steps:

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