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Pine Brook, NJ, United States

Chiral Photonics, Inc. is a photonics company based in Pine Brook, New Jersey, founded in 1999. The company is developing a new class of optical devices based on twisting glass optical fibers. These in-fiber devices aim to displace discrete optical elements such as lasers, filters and sensors. They benefit from optical fiber’s transmission efficiency, robustness and ease of integration.The company hopes that its manufacturing process, which is completely automated and scalable, will result, for example, in communications lasers that are fraction of the cost and three times more efficient than today’s semiconductor lasers. Chiral Photonics is also developing chirality in polymeric thin films which, for instance, would enable high quality projection displays. Wikipedia.


Grant
Agency: National Science Foundation | Branch: | Program: STTR | Phase: Phase I | Award Amount: 150.00K | Year: 2007

This Small Business Innovative Research (STTR) Phase I project will demonstrate the feasibility of an innovative optical chiral fiber sensor (CFS) technology. A double helix structure with pitch greatly exceeding the wavelength will be imposed by twisting glass fibers with noncircular cores as they pass through a miniature oven in a twisting tower with enhanced temperature and motion control. The chiral long period grating (CLPG) will couple core and cladding modes to produce a series of dips in transmission of the core mode. The central wavelengths and depths of these dips are sensitive measures of the strain, pressure, torque, and temperature of the fiber and of the refraction index of the material surrounding the fiber. The CPLG design will be guided by an innovative combination of analytical calculations assisted by 2-D hybrid transverse finite elements electromagnetic simulations and fully three-dimensional finite vector elements simulations of wave propagation. These simulations will yield the coupling strength between the core and cladding modes. The results of transmission measurements with varying temperature, elongation and surrounding refractive index will be used to refine the assumptions of the calculations. The improved model will be used to fabricate the CLPG and to design a transducer for a CFS. The innovative CLPGs present a clear advantage of a broad choice of glass materials, which may be selected for resistance to harsh environments at high temperatures and/or radiation levels such as those in oil wells, nuclear reactors or outer space. In contrast, conventional fiber gratings created in UV sensitive glass fibers are significantly degraded in such harsh environments. The versatile fabrication approach allows for the flexible production of a full suite of sensors functioning over a broad frequency range by a single tool by changing the computer controlled twist and draw rates. This manufacturing process will make it possible to fabricate highly sensitive uniform CLPGs while dramatically lowering the production cost relative to conventional fiber gratings, which require precise patterning of UV radiation. The improved manufacturing process will also be used to produce other devices based on chiral fibers for filter, laser, sensor and polarizer applications. The computational model developed will enhance the understanding of optical interactions with chiral fibers and thereby facilitate the development of new chiral fiber devices.


Patent
Chiral Photonics, Inc | Date: 2012-01-20

The inventive circular chiral fiber polarizer is operable to convert linearly polarized light to circularly polarized light, may be advantageously fabricated in an in-fiber manner and to comprise desirable extinction ratio characteristics, and may also serve as an interface between a sequentially positioned polarization maintaining (PM) fiber, and a single mode (SM) fiber.


Patent
Chiral Photonics, Inc | Date: 2012-01-20

The inventive chiral polarization preserving optical fiber utilizes a structure composed of specially positioned and configured single mode (SM) and conventional polarization maintaining (PM) fiber elements along with at least two novel circular chiral fiber polarizers (each operable to convert linearly polarized light to circularly polarized light), to preserve any arbitrary polarization state of light signals transmitted therethrough without the limitations and drawbacks of other polarization maintaining solutions. In another inventive embodiment thereof, the inventive chiral polarization preserving optical fiber is configured as an arbitrary polarization state maintaining light signal splitter.


Patent
Chiral Photonics, Inc | Date: 2012-01-20

The inventive configurable chiral fiber sensor is readily configurable for use in a variety of applications (such as applications involving pressure and/or temperature sensing), and which is particularly suitable for applications in which the sensing of a presence or absence of the target sensed event (e.g., specific minimum pressure or minimum temperature) is required. Advantageously, the inventive configurable chiral fiber sensor utilizes light sources, photodetectors, and related devices for sensor interrogation.


Patent
Chiral Photonics, Inc | Date: 2012-01-20

The inventive configurable chiral fiber sensor with a tip-positioned sensing element, is readily configurable for use in a variety of applications (such as applications involving pressure, temperature, and even axial twist sensing), and is particularly suitable for applications requiring highly precise and accurate sensor readings within corresponding predefined limited sensing ranges. Advantageously, the inventive configurable chiral fiber sensor with a tip-positioned sensing element, is operable to utilize a wide variety of light sources, photodetectors, and related devices for sensor interrogation.

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