MY Polymers – The Low Refractive Index Company.

Distinguished by its total focus on low Refractive Index (RI=1.30 to 1.50) coatings, recoating materials, adhesives, and polymers, MY Polymers is a leader in this field.

Our products include low refractive index primary coatings (cladding resins), which are used in optical fiber drawing towers for manufacturing specialty optical fibers.

Our Re-Coating materials are used for recoating splices, combiners, and other components where there is a need to recoat a splice or a stripped section of an optical fiber. Our recoating resins are used in both recoaters and manual recoating. 

Our products are based on the proprietary resins that we synthesize from raw materials.


Our recoating materials are used by manufacturers of fiber lasers and sub-systems and components of fiber lasers. The low index of refraction enables new applications in electronic displays, biophotonics, and security printing.

We are working continuously to improve our customer support. Recently, we began to offer a degree of cure measurements for customers who want to evaluate our primary coatings or wish to analyze the impact of introducing a change in their drawing process parameters.

MY Polymers is ISO certified by The Standards Institute of Israel, SII – a founding member of ISO and the country’s quality leader. 

Click to see our  ISO CERTIFICATE

Our products are sold in the US, Europe, Japan, South Korea, Canada, China, Taiwan, Singapore, and Israel. 

Our customers include manufacturers of specialty optical fiber; Fiber laser manufacturers; fiber-optic components suppliers; manufacturers of optical amplifiers; electronic display manufacturers.

About 200 companies and institutes use our products in a wide range of applications covering (to name but a few) SPR Biosensors; Microfluidics; Microscopy calibration targets; Automotive instrumentation panel backlights; Optical security of documents; Light engines; and 3D displays.

Recoating materials

Our recoating materials are used in the construction of fiber lasers. Splices that are created during the fiber laser assembly process, have to be recoated. Likewise, each component used in the assembly of a fiber laser has to be recoated and encapsulated by a recoating material.

Currently, the most common specialty optical fibers (both active and passive) use primary coatings with an index of 1.36 (e.g. OF-136). Recoating materials with the same low index of refraction, 1.36, are very common in recoating applications. Typically, 1.36 index materials are used for recoating splices, Pump Power Combiners, Couplers, and FBG (Fiber Bragg Gratings).

Our recoating materials were designed to be used on recoaters and in manual recoating. Viscosity in the range of roughly 2000 cps is ideally suited to recoaters, resulting in high-quality smooth molds.

Our low index recoating materials are dedicated for recoating. This focus enables optimization of adhesion (higher adhesion than primary coatings) and modulus (recoatings are more flexible, allowing better performance under thermal cycling).

For Cladding Light Strippers (Called also Cladding Power Strippers), a higher index is required, because of the idea to strip the cladding modes and get rid of them. During the last few years, we see an escalating trend to use Cascaded Cladding Light Strippers. Cascaded CLSs enables to distribute the power more evenly along the whole length of a CLS device. This prevents the formation of a high-temperature hot spot. Instead, multiple hot spots with significantly lower temperatures are formed, enabling the whole device to remain cooler.

  • Optical Fiber Primary Coatings (Cladding Resins)

MY Polymers Optical Fiber (OF) Coatings are used as a first (primary) coating in specialty optical fibers. Distinguished by their carefully balanced combination of high adhesion to the core, and high modulus, these UV cured coatings are setting new standards. Our OF-136 (Index=1.36) is used by the majority of specialty optical fibers manufacturers. This product, like some other members of the OF family, includes a proprietary adhesion promoter that dramatically improves adhesion under wet conditions. Our adhesion promoter was designed to be relatively stable, compared to commercially available adhesion promoters. One major application of OF-136 is for active Erbium-Doped fibers used in both Fiber Lasers and EDFA Optical Amplifiers.

The disruptive OF-133-V3 (index 1.33) enables a breakthrough Numerical Aperture of 0.6. The high NA can significantly increase the efficiency of fiber lasers and optical amplifiers. Pioneering companies are already at work, exploring the advantages of this exceptional primary coating. Its close relative, OF-134-V2, couples a low index of 1.34 with a relatively high modulus of 17 MPa. The higher modulus, compared to OF-133, is intended to enable a smoother transition to the ultra-low index OF coatings.

For mechanically demanding applications, customers choose the high modulus offered by OF-138 (index 1.38) and OF-140-N. These tough coatings are preferred for fibers that are subjected to high mechanical stresses. OF-HC-14 is our only secondary hard coat. The adhesion of OF-HC-14 to our primary low index coatings is about an order of magnitude higher, compared to similar commercially available hard coats.

Bio-photonic materials

Our selection of low refractive index polymers, with an index of 1.33, that matches waters and cell tissues enable a wide range of benefits in biophotonics (For example, improved image quality in live-cell imaging in micro-chamber arrays made of a polymer with an index of 1.33 or 1.34).  

BIO-133 and BIO-134 with index 1.33 and 1.34 were designed for minimal cytotoxicity and minimal fluorescence, and are being gradually adopted by more researchers, both in the academy and in pioneering biotech companies.

Recently published academic papers (e.g. Zangle et al) keep demonstrating the significant improvement in imaging, enabled by the low index of refraction of our materials. The 1.33 index is matched to the refractive index of water and cells, resulting in significant improvement and elimination of optical distortions.

Materials for Optical Communications Components

Adhesives, Coatings, Sealants, Potting, and Encapsulations Materials.

MY Polymers offers a wide range of materials for Optical Communications and networking. We continuously adapt our products to the fast-changing requirements of the Optical Communications industry. Our products can be found in EDFA optical amplifiers, in Optical Transceivers, PLC Splitters, V-Groove Arrays, and Integrated Photonic Circuits.

The Dual Cure (UV or Heat or Both) DC Product Line.

Our Dual Cure (DC) products find a growing number of applications as adhesives, coatings, and sealants. All our Dual Cure materials are one component materials. They are cured by either UV radiation, Heat, or a combination of both. This feature enables curing in partially or fully shaded regions of the device.

The DC line includes both flexible and rigid products with a refractive index from 1.33 to 1.50, with relatively big selection close to the index of silica. These include DC-1455 (flexible, index=1.448 at 950 nm) and DC-1455-HM and (Rigid, index=1.451) The DC line also includes high bond strength products like DC-150 (flexible) and DC-1473 (rigid).

Typical applications include:

V-Groove Array: Bonding & cladding the fibers inside the V-Grooves, fixing the fibers externally. For bonding inside the V-grooves array, if a low index is preferred, customers can use DC-136-EA, if not customers can use DC-1455 or DC-150. If a rigid adhesive is preferred, use DC-1455-HM or DC-1473-HM. For fixing the input/output fibers use the versatile DC-150, (or the UV cured MY-150). And for rigid fixing, use DC-1455, DC-1475, (or the UV cured MY-1473).

Sealant for an Optical Component Package.

The entry points of an optical fiber into the external package of a component can be sealed using one of our Dual Cured products, such as DC-1455 (when important to keep the index just below that of the silica fiber core) or DC-150. Both are very flexible, and this reduces the stress during thermal cycling or after a thermal shock. This enables the higher reliability of the device. The Dual Curing feature can be used for an initial fixing of the external side of the seal. Afterward, heat curing is used to cure the hidden part of the seal.

Electronic display adhesives

Our LOCA adhesives are distinguished by their unique combination of high bond strength AND low refractive index. The LOCA products exhibit strong adhesion to various substrates, including glass, PMMA, PET, PC, and metals.

These adhesives remain tacky even after full curing, and therefore they are intended to be used as lamination adhesives, between optical films and other flat surfaces. The low index enables bonding between layers while keeping the light from leaking between adjacent layers. For example, it is possible to attach a diffuser film to a light guide without degrading the light-guiding capability.

The adhesion of LOCA-133 (index=1.33) is 25-50 times stronger compared to our previous generation of adhesives with the same 1.33 index. MY Polymers believes this breakthrough in the bonding strength of an optical adhesive with an index of 1.33 opens various opportunities, especially in the electronic display market. LOCA-135, with an index of 1.35, is significantly cheaper, compared to LOCA-133. LOCA-133-S1 is a 100% solids (no solvents at all) version of LOCA-133.

LOCA-133 combines a low index of 1.33 AND strong adhesion to various substrates.

LOCA-135 has an index of 1.35. It is a lower-cost version of LOCA-133.