Available technologies

MOFsoft: software modelling for optimal MOF fabrication

Reference number: 7410

Our model solves an important inverse design problem in Microstructured Optical Fibre (MOF) fabrication: how to find the initial preform shape and the manufacturing parameters required for the desired final cross-plane geometry.

Proposed use

Our software provides valuable insights into how fabrication variables  such as glass temperature, feed and draw speeds, and surface tension  affect the shape of the channels during the draw. For a given preform  shape and draw parameters, the software provides accurate  predictions of how the channels will deform.

Problem addressed

In MOF fabrication, the pattern of channels in the fibre plays a crucial  role in guiding light along the fibre. It is imperative to find the initial  preform geometry and the manufacturing parameters required to  draw MOFs with desired end cross-plane geometries. Even minor  unwanted deformations in a small number of the channels can  severely compromise a fibre’s optical performance, thus optimal  manufacturing of MOFs requires an improved understanding of the  channel deformations.

Current solutions to determine acceptable MOF fabrication methods  are typically physical, trial-and-error processes. These methods  are time-consuming, expensive and sub-optimal. Our novel and  patented MOF simulation software meets the above industry need.

Technology overview

A mathematical model has been developed describing the  deformation, under the combined effects of surface tension and  draw tension, of an array of channels in the drawing of a broad  class of slender viscous fibres. This has been implemented into  a software capable of giving accurate predictions of the required  preform geometry and processing conditions to achieve the desired  final shape of a MOF.

Technology Readiness Level

The accuracy of the elliptical pore model as an approximation has  been tested by comparison with full numerical simulations and  experimental draws. Initial testing has proved successful and a demo  is available. Technology Readiness Level: 4.


  • Accurate predictions on  preform shape required to  give desired final geometry
  • Indications on optimal  manufacturing processes for  desired final geometry


  • MOF fabrication optimisation
  • Photonics design software  (Modelling and simulation)

Download datasheet

Intellectual Property

A US patent has been granted: US20160357174A1

Inventor information

Dr Peter Buchak

Professor Darren Crowdy


Mei Chong

Industry Partnerships and Commercialisation Officer, Natural Sciences


+44 (0)20 7594 9927

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