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"Three-axis distributed fiber optic strain measurement in 3D woven composite structures   Paper 8690-6 Time: 1:50 PM - 2:10 PM Author(s): Matt Castellucci, Evan M. Lally, Sandra Klute, Luna Innovations Inc. (United States); David Lowry, NASA Johnson Space Ctr. (United States) Hide Abstract Add to My Schedule  Recent advancements in composite materials technologies have broken further from traditional designs and require advanced instrumentation and analysis capabilities. Success or failure is highly dependent on design analysis and manufacturing processes. By monitoring smart structures throughout manufacturing and service life, residual and operational stresses can be assessed and structural damage identified. Composite smart structures can be manufactured by integrating fiber optic sensors into existing composite materials processes such as layup, filament winding and three-dimensional weaving. In this work optical fiber was integrated into 3D woven composite parts at a commercial woven products manufacturing facility. The fiber was then used to monitor the structures during a VARTM manufacturing process, and subsequent static and dynamic testing. Low cost telecommunications-grade optical fiber acts as the sensor using a high resolution commercial Optical Frequency Domain Reflectometer (OFDR) system providing distributed strain measurement at spatial resolutions as low as 2mm. Strain measurements using the optical fiber sensors are correlated to resistive strain gauge measurements during static structural loading."

optical measurement and strain gauge

The Universal Beam Splitter. The UBS mounts in any standard 1" diameter mirror mount and behaves like a very low loss non-polarizing beam splitter cube with the added benefit that the reflectivity of the beam splitter can be adjusted from 1% to 90% for any wavelength. As the UBS is rotated, the transmitted and reflected beams remain at 90 degrees. A simple marvel of optical engineering.

Tibi is satisfied by this company, they have low cost high performance optics. He knows them from Raydiance. 

proposed by Jonathan

Field enhancement within an optical fibre with a subwavelength air core

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to coat the mirror and prevent oxidization

"Optical force sensor for high density planar electrical interconnects"

A 3-Axis Optical Force/Torque Sensor for Prostate Needle Placement in Magnetic Resonance Imaging Environments

recommended by the guys form Photon Etc. they are good for couplers, splitters, isolators, etc.

Tibi sent order to them for couplers and isolators

We (Tibi, Francois, and Jonathan) had a meeting with them, we are developing a stable relationship. The owner is member of the local network in photonics, so this relation is important from a social capital standpoint. They are kind of slow responding to our demands, probably because they don't yet see a big potential. They can collaborate with us for opto-mechanica assemblies, assemplied of photonics, optical fiber... Mostly for custom design. They buy most of the parts from other places, we can do that too, but they can design and male photonic devices.