Photronix Technologies (Malaysia)

Optical fiber couplers

 

 

 

Optical fiber couplers are used for branching or combining optical signals.

FBT couplers are fabricated by placing two standard single-mode fibers side by side, twisting them together to bring them into strong contact and thermally fusing (burning) them with flame or heater while elongating (tapering) the fused region. After the tapering process, the coupler is bonded to a quartz substrate with a special adhesive. The substrate with the coupler is inserted into a metal tube and the ends of the tube are closed with elastic epoxy glue. FBT technique of fabrication has proven to be an effective method for coupler construction because the resultant fused couplers can be potted and mounted in small and rugged packages.

We offer a variety of couplers types including our new 2-in-1 and 3-in1 coupler which houses any combination of two or three FBT couplers in one small space-saving package. Our couplers have the following characteristics:

Features :

Low excess loss
Low insertion loss
Excellent uniformity
Environmentally stable and reliable
Small size for miniaturized systems
Can be manufactured according to customer specifications
Compliant to Telcordia GR-1221 standards

Applications :

Cable TV
Optical fiber telecommunication network
Optical sensing technology
Measuring instruments and equipment

Coupler types : i) Standard Single-mode Fiber Coupler (SFC)   Single window tap coupler with various coupling ratios. Wavelength bandwidth +/- 10nm See SFC specifications and ordering info     ii) Wavelength Flattened Coupler (WFC)   Single window tap coupler with various coupling ratios. Wavelength bandwidth +/- 40nm See WFC specifications and ordering info     iii) Wavelength Independent Coupler (WIC)   Dual window tap coupler with various coupling ratios. Wavelength bandwidth +/- 40nm See WIC specifications and ordering info     iv) Standard Wavelength Division Multiplexer (SWDM)   Standard product with 1310/1550nm wavelength. Wavelength bandwidth +/- 15nm See SWDM specifications and ordering info     v) Pump Wavelength Division Multiplexer (PWDM)   Available in1480/1550nm wavelength. Wavelength bandwidth +/- 5nm See PWDM specifications and ordering info     vi) 2-in-1 & 3-in-1 Coupler Any combination of two or three FBT couplers See 2-in-1 & 3-in-1 specifications and ordering info

Download Coupler Specification [ PDF- 275kb ]