1310/1490/1550nm Three Window Singlemode Optical Couplers

>1310/1490/1550nm Three Window Singlemode Optical Couplers
1310/1490/1550nm Three Window Singlemode Optical Couplers 2017-08-12T18:52:23+00:00

Lfiber’s 1310/1490/1550nm optical coupler (three-window fiber optic splitter/combiner) is a passive fiber optic component based on a fused-fiber design. This optical coupler distributes input power from one (or two) single fiber to two output fibers. This fused fiber optic splitter shows uniform performance across the three optical windows (1310nm, 1490nm, and 1550nm band) and features low insertion loss, low PDL, high stability and reliability. Related Products

Lfiber’s three-window optical coupler (1310/1490/1550nm fiber optic splitter) is Telcordia GR-1221/GR-1209 and RoHS compliant. It works well even in the outdoor application or harsh environment.

Optical Coupler 1310/1490/1550nm Fiber Optic Beam Splitter/Combiner

Optical coupler (fiber optic beam splitter/combiner) is a fused-fiber-based passive component that provides a method for splitting optical signals between input and output ports. It splits an optical signal into two or more fiber lines or combines several signals coming from different fiber lines in a single (or more) fiber line. In general, optical coupler components are combiners/dividers of transit signals. Applications include power distribution in optical communication systems, CATV Networks, local area networks (LANs), subscriber networks, etc.

1310/1490/1550nm tap coupler (fiber optic splitter/combiner 1/99 2/98 5/95 10/90 20/80 30/70 40/60 … )

With the fused biconic taper (FBT) method, two single-mode fibers are pulled, twisted, and melted together over a uniform coupling region. The fiber diameter decreases gradually from the input toward the coupling region, where it exchanges power with the second fiber. The component design controls the fraction of power delivered to each of the output ports. By changing the coupling region width W and the tapered region L, the coupling ratio can vary from 1% or less (a so-called tap coupler) to 50%.

Fused WDM and Optical Coupler

Lfiber’s optical coupler can be designed to operate at a single wavelength (e.g. 1310nm, 1490nm or 1550 nm), to be wavelength flat (e.g. insensitive to wavelength variations within a single window, so-called wavelength flattened coupler) or to be wavelength independent (e.g. insensitive to wavelength variations within both the second and third windows, 1260-1360 nm and 1450-1600 nm, or even full bandwidth from 1260 to 1620 nm).

You may also interested in fused-fiber WDMs and couplers with different operating wavelengths, fiber types, connector types, handling power, package sizes, etc. We also support customizing these fiber optic components for specific applications on request.


1310/1490/1550nm Three Window Singlemode Optical Coupler


Optical Coupler 1310nm 1490nm 1550nm Fiber Optic Splitter/Combiner
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  • Three Operating Window
  • Low PDL
  • High Reliability and Stability


  • FTTH, Passive Optical Network
  • CATV Network
  • Optical Communication System
  • Optical Amplifier


1310/1490/1550nm Optical Coupler Specifications
ParametersGrade PGrade A
Port1x2 or 2x2
Operating Wavelength (nm)1310, 1490 and 1550; Others on Request
Bandwidth (nm)1310 ± 40, 1490 ± 10, and 1550 ± 40
Insertion Loss (dB)50/50≤3.6≤3.8
PDL (dB) ≤0.15≤0.20
Directivity (dB)≥55
Fiber TypeSMF-28e Compatible; Others on Request
Working Temperature (°C)-40 ~ +85
Package (mm)250μm Bare Fiber: Steel Tube, Φ3 × 54

0.9 mm Loose Tube: Steel Tube, Φ3 × 54

2 mm or 3 mm Cable: ABS Box, 90 × 20 × 10

1. Above data are test results without connectors. The insertion loss of one pair of connector is less than 0.3 dB.
2. Lfiber’s 1310/1490/1550nm optical coupler is customizable and subject to change without notice.
3. For product customization or special requirement, please contact our sales representative.


Ordering Information

PortSplit RatioGradeWavelengthFiber TypePigtailPackageFiber LengthConnector
1×250/50P1310/1490/1550nmSMF-28e250 μmΦ3 × 540.50 ± 0.05 mNone
2×240/60ACustom …0.9 mm90×20×101.00 ± 0.1 mLC/UPC
30/702 mmCustom …Custom …LC/APC
20/803 mmSC/UPC
1/99Custom …