Research

IRflex Signed a Phase II 800,000$US Contract to Develop an Anti-reflective Surface for Infrared Optical Fiber Endfaces

On January 29, 2021, IRflex Corporation signed a Phase II contract with the Department of Defense after completion of the Phase I project of the same title to develop an anti-reflective surface for infrared Optical fiber Endfaces.

The objective of the project is to develop an anti-reflective surface for use on bare and connectorized infrared fiber optic cable assembly in the wavelength interests of 1.4 to 5 micron.  In such region, optical materials with a large index of refraction are often used.  According to the Fresnel equation, reflection loss increases significantly when the difference between the index of the exit medium and the index of the entrance medium is 1 or greater.  In addition to the need for low reflectivity, anti-reflective surfaces must be tolerant to high optical power.

The project requests that the anti-reflective surface should be realizable on non-silica optical fiber including indium fluoride, chalcogenide, tellurite, and ZBLAN. Fiber optic cables should be designed to assemble with Subminiature Version A (SMA) 905 connectors and be compatible with short and mid-wave laser sources for the wavelength interest region of 1.5 to 5 micron. The fiber optic cable assembly must pass thermal, vibration, and humidity environmental testing.  The end result of this project is an anti-reflective surface with an improved damage threshold for high power application that can be manufactured.

The project started on February 1, 2021 and will last for the next two years.

IRflex Corporation Awarded DOD SBIR Phase I contract for High Performance Optical Fibers for 100-Watts infrared Lasers.

November 24, 2020, Danville, VA – Rflex Corporation, has been awarded a United States Department of Defense Small Business Innovation Research (SBIR) Contract entitled High Performance Optical Fibers for 100-Watts infrared Lasers.

The objective of this contract is to develop a high performance, low loss (less than 0.5dB/m), infrared (IR) fiber technology for transmitting high power greater than 100 Watts CW from a multi-band mid-infrared laser for the wavelength from 2 to 6 micron. The Phase 1 contract is to design an approach to produce such fiber using our chalcogenide glass fiber technology and performance assessment.

The period of performance for this effort is six months from December 1, 2020 to May 31, 2021.  A four months option is included as a possible bridge option between Phase 1 and Phase 2.