Single Mode Standard & Dual Windows Coupler

FBT is a method of bringing two (or more than two) optical fibers with coated layers together in a certain way, melting under high temperature heating, and stretching to both sides at the same time, and finally forming a special waveguide structure in the form of a double cone in the heating area to realize the transmission of optical power coupling. From the port is divided into: X coupler, Y coupler, star coupler, tree coupler. From the conduction mode can be divided into single-mode couplers, multi-mode couplers.

Related products

 
 

Product Features:

  • Low Excess Loss
  • Various Coupling Ratio
  • Compact Size
  • High Stability and Reliability

 

Product Application:

  • Long-haul Telecommunications
  • CATV Systems
  • Fiber optic Sensors
  • Local Area Networks
  • FTTH & LAN

 

Product Parameters:

Parameter

Unit

Single window

Dual window

P Grade

A Grade

P Grade

A Grade

Operating Wavelength

nm

850, 980, 1310, 1550 and wideband or Customized

Coupling Ratio

%

50/50

50/50

50/50

50/50

Excess Loss (Typical)

dB

0.15

0.2

0.15

0.2

Maximum Insertion Loss

dB

3.4

3.5

3.6

3.8

Uniformity

dB

N/A

N/A

0.7

1

Polarization Sensitivity

dB

0.1

0.15

0.1

0.15

Coupling Ratio

%

1~50

Directivity

dB

≥55

Operating Temperature

-20 to +85

Storage Temperature

-40 to +85

Fiber Type

 

Corning SMF-28E+(LL), DS Fiber or flexcore

Fiber Length

m

1 meter each end

Port Configuration

 

1x2 or 2x2

Package Dimension

mm

Φ5.5xL30

 

Coupling Ratio

Insertion Loss (dB)

 

Single window

Dual window

 

P Grade

A Grade

P Grade

A Grade

40/60

4.5/2.5

4.6/2.8

4.7/2.7

5.0/2.9

30/70

5.6/1.85

6.0/2.0

6.0/1.9

6.4/2.1

20/80

7.5/1.2

7.7/1.3

7.5/1.3

8.5/1.4

10/90

11.0/0.6

11.5/0.8

11.0/0.6

12.0/0.8

5/95

14.2/0.4

14.6/0.5

14.0/0.4

14.6/0.43

1/99

21/0.2

21.5/0.3

22.5/0.25

23.0/0.35