Polarization-Maintaining patch cord (PM patch cord for short) are specialized fiber optic patch cables that, by introducing stress zones or specialized structures within the fiber core, achieve high birefringence during transmission, thereby maintaining the polarization state of the optical signal. While conventional optical fiber is susceptible to polarization changes due to external factors, polarization-maintaining fiber effectively avoids this problem through its design.
PM patch cords are commonly used in scenarios requiring high polarization stability, such as:
The polarization-maintaining patch cord Yingda provided are mainly use PANDA fiber.
Yingda manufactures a wide range of PM patch cords, which production and testing standards primarily cover physical specifications, appearance requirements, classification parameters, length and attenuation testing, end-face 3D inspection, optical performance testing, connectivity, and durability testing. All PM patch cords will compliance with IEC 61755-3-31 and TIA-568 international standards.
Polarization-maintaining patch cords typically use single core indoor cables. For higher requirements, armored cables can be used with better tension strength.
Panda fiber differs from ordinary fiber in that it has two cat’s eyes on either side of the fiber core, distinguishing between fast and slow axes. During alignment and connection, the slow and fast axes of the fiber must be precisely aligned to ensure alignment of stress zones and prevent polarization shifts.
✅ Fast Axis: the connector key is alignment with the polarized light.
✅ Slow Axis: the connector key is cross with the polarized light.
The PM patch cord cable can be bare fiber 250um, 900µm or 3mm.
The 0.9mm loose tube is made of hytrel, and the 2mm or 3mm loose tube is typically made of PVC or LSZH, which can be customized to meet customer requirements.
Kind Note: If you need to pre terminated fiber PM patch cord with bare fibers, it is every easy to break the fiber during assembly, crimping or polishing, so we must add 1cm section of loose tube at the connector tails.
Meanwhile, the loose tube or cable sheath colors for PM patch cords can be customized to your specifications. Commonly used colors include green, blue, red, gray, and white.
The mostly used optic connectors for PM patch cord are FC connectors due to threaded locking mechanism, which ensures precise alignment of the fiber ferrule, minimizing polarization deviations caused by mechanical vibration or insertion and removal.
Meanshile, the FC interface is standard for traditional high-precision instruments (such as spectrometers and test equipment), facilitating compatibility with existing systems. And in order t help better plug and unplug the connectors, we can provide long end caps (or called tethered dust cover) as left:
Due to PM patch cord is specially used in Fiber laser, Fiber amplifier, Testing instrument,Optical lab use, so the real requirements will differ a lot, support customized for below parameters:
350nm, 460nm,630nm,780nm, 850nm, 980nm, 1064nm,1310nm, 1480nm, 1550nm, 1570nm, etc
Fujikura, Corning, YOFC, Coherent, Fibercore, Nufern, etc
250um bare fiber, 900um loose tube, 3mm cable, 5mm cable or armored cable
0.5m, 1m, 2m, 3m, 4m, 8m, ... to 80meters
SC/UPC, SC/APC, FC/UPC,FC/APC, LC/UPC, LC/APC, MU/PC, etc
Yingda are fiber patch cord factory, no middle man, competitive price, please rest assured to buy.
We only do TT, no credit, hope understanding and support. Then we can focus on our product quality more to help build long term business partnership.
We recommend using specialized equipment to test polarization maintaining patch cables, so as to ensure accuracy and stability, such as a polarization extinction ratio tester, 3D interferometer, and OTDR.
You can use a fiber optic cleaning pen or a fiber optic cleaning kit to clean the connectors. When cleaning PM patch cords, pay special attention to the alignment of the fast and slow axes. Avoid rotation or lateral force during cleaning to prevent polarization shift.
Common PM fiber patch cord connectors include FC/UPC, FC/APC, LC/APC, SC/UPC, and SC/APC.
If PM fiber have stock, very fast about 3-5days. If no fiber, we should buy from the specified agent, the lead time will depend on them, and it will take about 1 week to pre terminated fiber optic cables.
Accept smal orders, 1piece is ok, if we have fiber stock. If not, will depend on fiber MOQ.
High productivity efficiency, skilled front-line operators and strict production control ensure timely delivery.
High-precision testing equipment and top industry quality control system ensure high quality standards.
Long-term stable supply chain and cost control that changes in line with market trends ensure the best price
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