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Dual Window Coupler (DWC)

Dual window coupler (DWC) is built by asymmetric coupling technique. The operating bandwidth of this normal coupler is expanding to ±40nm, and the ultra broadband coupler is expanding to ±80nm. The DWC coupler has the same coupling ratio on both 1310nm and 1550nm communication windows, and with low excess loss and low PDL. DWC couplers are widely used for communication systems, CATV, and FTTH.


Key Features

§ Low excess loss

§  Low PDL

§ Dual operating window

§  High stability and reliability


Applications

§  Optical communication systems

§  CATV

§  FTTH

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Dual Window Coupler (DWC)


Specifications

Type

Parameter

Normal

Ultra Broadband

Grade

P

A

P

A

Operating   wavelength (nm)

1310 and 1550

Operating   bandwidth (nm)

±40

±80

Typical   excess loss (dB)

0.07

0.1

0.07

0.1

Insertion   loss (dB)

50/50

≤3.6

≤3.8

≤3.8

≤4.0

45/55

≤4.2/3.2

≤4.4/3.4

≤4.5/3.3

≤4.7/3.5

40/60

≤4.7/2.7

≤4.9/2.9

≤5.0/2.8

≤5.2/3.0

35/65

≤5.4/2.4

≤5.7/2.6

≤5.8/2.5

≤6.1/2.7

33/67

≤5.7/2.2

≤6.0/2.4

≤6.1/2.3

≤6.4/2.5

30/70

≤6.0/1.9

≤6.3/2.1

≤6.4/2.0

≤6.7/2.2

25/75

≤7.0/1.7

≤7.3/1.9

≤7.3/1.7

≤7.7/1.9

20/80

≤7.9/1.3

≤8.4/1.4

≤8.3/1.3

≤8.7/1.5

15/85

≤9.5/1.0

≤10.0/1.2

≤9.6/1.0

≤10.1/1.2

10/90

9.2~11.2/≤0.75

8.80~11.40 /≤0.8

9.15~11.05 /≤0.75

8.75~11.45/≤0.8

5/95

12.05~14.15/≤0.4

11.60~14.60 /≤0.5

12.00~14.25/≤0.45

11.50~14.70/≤0.5

3/97

14.1~16.5/≤0.35

13.60~17.05/≤0.45

14.00~16.60 /≤0.35

13.45~17.15/≤0.45

2/98

15.75~18.45/≤0.3

15.15~19.00/≤0.4

15.60~18.60/≤0.3

14.95~19.20/≤0.4

1/99

18.6~21.6 /≤0.25

17.95~22.25/≤0.35

18.35~21.85/≤0.25

17.60~22.55/≤0.35

PDL   (dB)

≤0.15

≤0.2

≤0.15

≤0.2

Directivity (dB)

≥55

Operating   temperature (℃)

-40   ~ +85

*The above specification is without connector

*Insertion Loss around 1380nm (water peak) is not counted in the specifications above.