Quick Answer / Summary: An LC LC multimode cable is a duplex optical jumper terminated with 1.25mm ceramic LC connectors on both ends, utilizing 50/125µm laser-optimized multimode fiber (OM3, OM4, or OM5). Operating at 850nm and 1300nm VCSEL wavelengths, it supports 10GBASE-SR (up to 300-550m) and 25G/100G BiDi links with plug-and-play simplicity.
In enterprise structured cabling, local area networks (LANs), and high-density data centers, duplex LC-to-LC multimode patch cords represent the primary physical layer link connecting servers, storage systems, and optical switches. Deploying certified lc lc multimode assemblies guarantees ultra-low insertion loss (≤0.20 dB), high return loss, and dependable 10G to 100G transmission across enterprise facilities.
Precision Electro-Optics of LC LC Multimode Cords
LC LC multimode cables provide four fundamental engineering advantages: 1. Symmetrical 1.25mm Zirconia Ceramic Ferrules: Featuring precision-drilled ceramic ferrules with concentricity tolerances below 0.5 microns, ensuring exact core-to-core optical alignment; 2. Laser-Optimized 50/125µm Core: Graded-index profile provides 2,000 MHz·km (OM3) to 4,700 MHz·km (OM4) Effective Modal Bandwidth, eliminating differential mode delay (DMD); 3. Standard A-to-B Duplex Polarity: Factory pre-crossed pairs route Transmit (Tx) to Receive (Rx) in full compliance with ANSI/TIA-568-C.3; 4. Robust Flame-Retardant Jacketing: Available in OFNR (Riser), OFNP (Plenum), and LSZH (Low Smoke Zero Halogen) constructions reinforced with aramid yarn strength members.
Uniboot High-Density Cable Architecture
LC LC Uniboot cables house both optical fibers in a single 2.0mm jacket, reducing cable bulk by 50% and improving cooling airflow across high-density switch chassis.
Bend-Insensitive Glass Performance
Modern LC LC multimode cords incorporate bend-insensitive fiber (BIMMF) with an optical trench, tolerating 7.5mm tight bend radii without signal leakage in crowded wire managers.
Cleaning and End-Face Inspection Protocols
Because a 1-micron dust speck on a 50µm core can cause severe attenuation, field best-practice mandates dry click-cleaning before every mating cycle per IEC 61300-3-35.
LC LC Multimode Patch Cord Operating Specifications
| Specification Parameter | OM3 LC LC Multimode | OM4 LC LC Multimode | OM5 LC LC Multimode |
|---|---|---|---|
| Core / Cladding Diameter | 50.0 / 125 µm | 50.0 / 125 µm | 50.0 / 125 µm |
| Effective Modal Bandwidth | 2,000 MHz·km at 850nm | 4,700 MHz·km at 850nm | 4,700 MHz·km (850-953nm) |
| 10GBASE-SR Reach | 300 meters (984 ft) | 550 meters (1,804 ft) | 550 meters (1,804 ft) |
| 40G / 100G BiDi Reach | 70 meters (230 ft) | 100 – 150 meters | 150 meters (SWDM4) |
| Standard Jacket Color | Aqua | Aqua / Heather Violet | Lime Green |
| Typical Insertion Loss | ≤ 0.15 dB | ≤ 0.15 dB | ≤ 0.15 dB |
Real-World Application Scenarios
Data center Top-of-Rack server switching, SAN storage fabric interconnections, campus backbone distribution, and enterprise virtualization clusters.
Recommended Internal Resources
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Frequently Asked Questions (FAQ)
Q: What is the difference between LC LC OM3 and LC LC OM4 patch cords?
A: Both use 50/125µm core glass, but OM4 features higher modal bandwidth (4,700 MHz·km vs 2,000 MHz·km), extending 10G reach from 300m to 550m and 100G reach from 70m to 150m.
Q: Can an LC LC multimode patch cord be used for singlemode connections?
A: No; multimode LC patch cords have a 50µm core, which is incompatible with 9µm singlemode transceivers; using multimode cable on singlemode links causes severe optical attenuation and link failure.