Optical Coupler

  • Update:Apr 30, 2020
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The Near Infrared Coupler splits light at any selected wavelength from 700nm to 1150nm. Designed for applications in fibre laser sensor and avionics applications the coupler utilizes GHs low loss fused fibre technology.

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Fiber optic couplers are devices used in optical fiber systems with one or more input fibers and one or several output fibers. Light entering an input fiber can appear at one or more outputs and its power distribution potentially depending on the wavelength and polarization. Such couplers can be fabricated in different ways, for example by thermally fusing fibers so that their cores get into intimate contact. If all involved fibers are single-mode (supporting only a single mode per polarization direction for a given wavelength), there are certain physical restrictions on the performance of the coupler. In particular, it is not possible to combine two or more inputs of the same optical frequency into one single-polarization output without significant excess losses. However, such a restriction does not occur for different input wavelengths: there are couplers that can combine two inputs at different wavelengths into one output without exhibiting significant losses. Wavelength-sensitive couplers are used as multiplexers in wavelength-pision multiplexing (WDM) telecom systems to combine several input channels with different wavelengths, or to separate channels.

We offer a varied selection of double-clad, single mode, multimode, and polarization-maintaining fiber couplers as well as RGB combiners and WDMs. These tools allow single fiber input to be split into 2 outputs, multiple inputs to be combined into one output, and two fibers to be joined. Our SM 2x2 fiber couplers also include a selection of couplers for OCT applications.

1XN(2XN) Single Mode Coupler Module

1×N (2×N) coupler splitter modules are cascaded with the single mode couplers. These modules are widely used for FTTH, LAN, and CATV optical networks

 

Dual Window Coupler Module (SDWC); Three-Window Coupler Module (STWC)

N×4 N=1, 2

N×6 N=1,2

N×8 N=1, 2

N×12 N=1,2

N×16 N=1, 2

N×24 N=1, 2

N×32 N=1, 2

N×64 N=1, 2

 

Operating wavelength (nm)

SDWC: 1310 and 1550;   STWC:1310,1490 and 1550

Operating bandwidth (nm)

SDWC: ±40;   STWC:1310 ±40,1490 ±10 and 1550 ±40

Grade

P

A

P

A

P

A

P

A

P

A

P

A

P

A

P

A

 

Insertion loss (dB)

≤7.2

≤7.6

≤9.6

≤10.2

≤10.8

≤11.4

≤13.2

≤14.0

≤14.4

≤15.2

≤16.8

≤17.8

≤18.0

≤19.0

≤21.6

≤22.8

 

Typical excess loss (dB)

0.3

0.4

0.45

0.55

0.6

0.7

0.75

0.9

 

PDL (dB)

≤0.3

≤0.4

≤0.4

≤0.5

≤0.5

≤0.6

≤0.6

≤0.7

 

Operating temperature (℃)

-40 ~ +85

Fiber lead length

1 meter, others on request

Fiber type

900μm, 2mm, 3mm loose tube

ABS Box Dimensions(L×W×H) (mm)

100×80×10

100×80×10

100×80×10

125×96×16

125×96×16

141×115×18

141×115×18

On request

 

Configuration

19   Inch Rack

LGX   Box

1U

2U

3U

1U

2U

Package Dimensions (mm)

482.6×278×44

482.6×278×88

482.6×278×132

130×127×29

130×127×58

Installation Dimensions (mm)

462.7×11.0(4-Φ6)

462.7×27.5(6-Φ6)

462.7×49.5(6-Φ6)

118(2-Φ6)

118×29.2(2-Φ6)

Single Mode Standard Coupler (SSC)

The single mode standard coupler (SSC) features low excess loss, high stability and reliability. It is widely used for optical fiber communication systems and CATV systems.

Key Features:

Applications:

Grade

Parameter

P

A

Operating   wavelength (nm)

1310   or 1550, others on request

Operating   bandwidth (nm)

± 15

Typical excess   loss (dB)

0.07

0.1

Insertion loss (dB)

50/50

≤3.4

≤3.6

45/55

≤4.1/3.1

≤4.3/3.3

40/60

≤4.4/2.6

≤4.7/2.8

35/65

≤5.2/2.3

≤5.5/2.5

33/67

≤5.4/2.2

≤5.7/2.3

30/70

≤5.7/1.9

≤6.0/2.0

25/75

≤6.6/1.7

≤7.0/1.8

20/80

≤7.6/1.25

≤8.0/1.35

15/85

≤9.2/1.0

≤9.6/1.2

10/90

9.2~11.0/≤0.65

9.0~11.2/≤0.8

5/95

12.0~14.2 /≤0.4

11.75~14.45/≤0.5

3/97

14.05~16.55/≤0.3

13.75~16.85/≤0.4

2/98

15.7~18.5/≤0.25

15.35~18.85/≤0.35

1/99

18.55~21.5/≤0.2

18.15~22.0/≤0.3

PDL (dB)

≤0.10

≤0.15

Directivity   (dB)

≥55

Operating temperature (℃)

-40 ~ +85

2XN1×N (N×N) Monolithic Single Mode Coupler

1×3, 3×3, 1×4 monolithic couplers have the compact package size, low insertion loss, and high reliability performance. These couplers were designed for optical modules, the fiber sensors and fiber testing instruments.

Parameter

1×3 SSC

3×3 SSC

1×3 WBC

3x3 WBC

1x3  DWC

Operating wavelength (nm)

1310 or 1550

1310 or 1550

1310 and 1550

Operating bandwidth (nm)

±15

±40

±40

Grade

P

A

P

A

P

A

P

A

P

A

Typical excess loss (dB)

0.1

0.15

0.1

0.15

0.1

0.15

0.1

0.15

0.1

0.15

Insertion loss (dB)

≤5.4

≤5.7

≤5.6

≤5.8

≤5.6

≤6.0

≤5.8

≤6.2

≤5.8

≤6.2

PDL (dB)

≤0.2

≤0.25

≤0.25

≤0.3

≤0.2

≤0.25

≤0.25

≤0.3

≤0.25

≤0.3

Uniformity (dB)

≤0.8

≤1.2

≤1.0

≤1.4

 ≤1.0

 ≤1.4

 ≤1.3

 ≤1.6

≤1.2

≤1.5

Directivity (dB)

≥55

Operating temperature (℃)

-40 ~ +85

Needle Size Coupler (SSC)

Needle size couplers feature compact package size, low insertion loss, and high reliability performance. These couplers are designed for optical modules, fiber sensors, and fiber testing instruments.

Features

Applications

Parameter

Needle size coupler

Operating wavelength (nm)

1310 or 1550, others on request

Operating bandwidth (nm)

±15

Package dimension   (Ф×L) (mm)

Ф1.2×18

Grade

P

A

Typical excess loss (dB)

0.15

0.25

Insertion loss (dB)

50/50

≤3.60

≤3.80

40/60

≤4.60/2.8

≤4.90/3.00

30/70

≤5.90/2.10

≤6.30/2.20

20/80

≤7.80/1.30

≤8.20/1.50

10/90

≤11.30/0.75

≤11.80/0.90

5/95

≤14.50/0.50

≤15.00/0.55

3/97

≤16.90/0.40

≤17.60/0.45

2/98

≤18.80/0.35

≤19.50/0.40

1/99

≤21.80/0.30

≤22.50/0.35

PDL (dB)

≤0.1

≤0.15

Directivity (dB)

≥50

Operating temperature (℃)

-40 ~ +85

Configuration

1×2 or 2×2

Fiber lead length

1 meter, others on request

Mini Size Dual Window Coupler (DWC)

Dual window coupler (DWC) is built by asymmetric coupling technique. The operating bandwidth of this coupler is expanding to ±40nm. The DWC coupler has the same coupling ratio on both 1310nm and 1550nm communication windows. The mini size DWC is designed for the compact optical modules and communication systems.:

Parameter

 

Operating   wavelength (nm)

1310   and 1550

Operating   bandwidth (nm)

±40

Package   size (Ф×L) (mm)

Ф3.0/Ф2.4×30

Ф2.4×25

Grade

P

A

P

A

Typical   excess loss (dB)

0.1

0.15

0.15

0.25

Insertion   loss (dB)

50/50

≤3.60

≤3.80

≤3.70

≤3.90

40/60

≤4.70/2.70

≤4.90/2.90

≤4.70/2.80

≤5.00/3.00

30/70

≤6.00/1.90

≤6.30/2.10

≤6.10/2.10

≤6.40/2.20

20/80

≤7.90/1.30

≤8.40/1.40

≤8.00/1.40

≤8.50/1.50

10/90

9.20~ 11.30/≤0.75

8.75~ 12.00/≤0.80

9.25~ 11.50/≤0.80

8.80~ 12.00/≤0.85

5/95

12.05~ 14.35/≤0.40

11.55~ 14.85/≤0.50

12.10~ 14.40/≤0.50

11.60~ 14.90/≤0.55

3/97

14.10~ 16.70/≤0.35

13.55~ 17.25/≤0.45

14.15~ 16.75/≤0.40

13.60~ 17.30/≤0.45

2/98

15.75~ 18.65/≤0.30

15.10~ 19.25/≤0.40

15.80~ 18.70/≤0.35

15.15~ 19.30/≤0.40

1/99

18.60~ 21.80/≤0.25

17.90~ 22.50/≤0.35

18.65~ 21.85/≤0.30

17.95~ 22.55/≤0.35

PDL   (dB)

≤0.15

≤0.2

≤0.15

≤0.2

Directivity   (dB)

≥55

Operating   temperature (℃)

-40~+85

Configuration

1×2   or 2×2

Fiber   lead length

1   meter, others on request

Mini Size Wide Band Coupler (WBC)

Bandwidth expanding techniques (asymmetric techniques) are used to build the wide band coupler (WBC). The WBC has an operating bandwidth of ±40nm, low excess loss and PDL. The mini size WBC is designed for the compact optical modules and communication systems.

Features

Applications

Parameter

Mini Size Wide Band Coupler (WBC)

Operating   wavelength (nm)

1310   or 1550, others on request

Operating   bandwidth (nm)

±40

Package   size (Ф×L) mm

Ф3.0/Ф2.4×30

Ф2.4×25

Grade

P

A

P

A

Typical excess loss (dB)

0.10

0.15

0.15

0.25

Insertion loss (dB)

50/50

≤3.50

≤3.70

≤3.60

≤3.80

40/60

≤4.50/2.70

≤4.80/2.90

≤4.60/2.80

≤4.90/3.00

30/70

≤5.80/2.00

≤6.10/2.10

≤5.90/2.10

≤6.30/2.20

20/80

≤7.70/1.25

≤8.00/1.30

≤7.8/1.30

≤8.20/1.40

10/90

9.55~ 10.85/≤0.70

9.25~ 11.15/≤0.85

9.60~ 10.90/≤0.75

9.30~ 11.20/≤0.85

5/95

12.40~ 14.00/≤0.45

12.10~ 14.35/≤0.55

12.45~ 14.05/≤0.5

12.15~ 14.40/≤0.55

3/97

14.50~ 16.35/≤0.35

14.10~ 16.75/≤0.45

14.55~ 16.40/≤0.40

14.15~ 16.80/≤0.45

2/98

16.15~ 18.25/≤0.30

15.65~ 18.70/≤0.35

16.20~ 18.30/≤0.35

15.70~ 18.75/≤0.40

1/99

19.05~ 21.35/≤0.25

18.55~ 21.85/≤0.30

19.10~ 21.40/≤0.30

18.60~ 21.90/≤0.35

PDL (dB)

≤0.1

≤0.15

≤0.1

≤0.15

Directivity   (dB)

≥50

Operating   temperature (℃)

-40 ~ +85

Configuration

1×2   or 2×2

Fiber   lead length

1   meter, others on request

Mini Size Standard Coupler (SSC)

Mini size couplers are designed to meet the requirement of the optical modules and fiber systems where need the small coupler package size. LightComm develops the mini size SSC with high stability and reliability.

Features

Applications

Parameter

 

Operating wavelength (nm)

1310 or 1550, others on   request

Operating bandwidth (nm)

±15

Package size (Ф×L) mm

Ф3.0/Ф2.4×30; Ф2.4×25

Ф2.4×22; Ф2.0×18

Grade

P

A

P

A

Typical excess loss (dB)

0.10

0.15

0.15

0.25

Insertion loss (dB)

50/50

≤3.50

≤3.70

≤3.60

≤3.80

40/60

≤4.50/2.70

≤4.80/2.90

≤4.60/2.80

≤4.90/3.00

30/70

≤5.80/2.00

≤6.10/2.10

≤5.90/2.10

≤6.30/2.20

20/80

≤7.70/1.25

≤8.00/1.30

≤7.80/1.30

≤8.20/1.40

10/90

9.35~ 11.15/≤0.70

9.15~ 11.35/≤0.85

9.50~ 11.30/≤0.75

9.30~11.50/≤0.85

5/95

12.15~ 14.35/≤0.45

11.90~ 14.60/≤0.55

12.30~ 14.50/≤0.50

12.05~ 14.75/≤0.55

3/97

14.20~ 16.70/≤0.35

13.90~ 17.00/≤0.45

14.35~ 16.85/≤0.40

14.05~ 17.15/≤0.45

2/98

15.85~ 18.50/≤0.30

15.50~ 19.00/≤0.35

16.00~ 18.80/≤0.35

15.65~ 19.15/≤0.40

1/99

18.70~ 21.50/≤0.25

18.30~22.20/≤0.30

18.85~ 21.80/≤0.30

18.45~ 22.35/≤0.35

PDL (dB)

≤0.1

≤0.15

≤0.1

≤0.15

Directivity (dB)

≥50

Operating temperature (℃)

-40 ~ +85

Configuration

1×2 or 2×2

Fiber lead length

1 meter, others on request

Three-Window Coupler (TWC)

Built by asymmetric coupling technique, TWC operating bandwidth is expanding to 1310nm, 1490nm and 1550nm three communication windows. The TWC coupler has the same coupling ratio on 1310, 1490 and 1550nm communication windows, with low excess loss and low PDL. TWC is widely used for communication systems, CATV, FTTH, where multiple optical signals pass through single fiber.

Key Features

Applications

Grade

Parameter

P

A

Operating wavelength (nm)

1310,1490   and 1550

Operating bandwidth (nm)

1310 ± 40,1490 ± 10 and 1550 ± 40

Typical excess loss (dB)

0.07

0.10

Insertion loss (dB)

50/50

≤3.6

≤3.8

45/55

≤4.2/3.2

≤4.4/3.4

40/60

≤4.7/2.7

≤4.9/2.9

35/65

≤5.4/2.4

≤5.7/2.6

33/67

≤5.7/2.2

≤6.0/2.4

30/70

≤6.0/1.9

≤6.3/2.1

25/75

≤7.0/1.7

≤7.3/1.9

20/80

≤7.9/1.3

≤8.4/1.4

15/85

≤9.5/1.0

≤10.0/1.2

10/90

9.20~11.00/≤0.75

8.80~11.40/≤0.8

5/95

12.05~14.20   /≤0.4

11.55~14.65/≤0.5

3/97

14.10~16.50/≤0.35

13.60~17.05/≤0.45

2/98

15.60~18.55/≤0.3

15.00~19.20/≤0.4

1/99

18.45~21.70/≤0.25

17.80~22.40/≤0.35

PDL (dB)

≤0.15

≤0.20

Directivity   (dB)

≥55

Operating temperature (℃)

-40 ~ +85

All Band Coupler (ABC)

All Band coupler (ABC) is built by Special technique. The operating bandwidth of the coupler is expanded to 1260-1620nm, and with low excess loss and low PDL.

Key Features

Applications

Parameter

All Band Coupler

Grade

P

A

Operating   Wavelength(nm)

1260-1620

Typical   excess loss (dB)

0.07

0.1

Insertion   loss (dB)

50/50

≤3.8

≤4.0

45/55

≤4.45/3.45

≤4.65/3.65

40/60

≤5.1/3.1

≤5.3/3.3

35/65

≤5.7/2.7

≤5.95/2.90

33/67

≤6.0/2.55

≤6.25/2.75

30/70

≤6.4/2.3

≤6.7/2.5

25/75

≤7.4/2.0

≤7.65/2.2

20/80

≤8.3/1.7

≤8.8/1.8

15/85

≤9.9/1.4

≤10.1/1.50

10/90

9.10~11.10   /≤1.15

8.65~11.50/≤1.25

5/95

11.90~14.30/≤0.8

11.40~14.80 /≤0.9

3/97

13.85~16.75/≤0.75

13.30~17.35/≤0.85

2/98

15.45~18.75/≤0.7

14.75~19.40/≤0.8

1/99

18.25~21.95/≤0.65

17.50~22.70/≤0.75

PDL   (dB)

≤0.15

≤0.20

Directivity (dB)

≥55

Operating   temperature (℃)

-40   ~ +85

Wide Band Coupler (WBC)

We uses unique bandwidth expanding techniques (asymmetric techniques) to build the wide band coupler (WBC). The WBC has an operating bandwidth of ± 40nm or EDFA C band or L band, and it features low excess loss and low wavelength depend loss (WDL).

Key Features

Applications

Grade Parameter

P

A

P

A

Operating wavelength (nm)

1310   ,1550 or C+L Band

C   Band or L Band

Operating bandwidth (nm)

± 40

1528 ~1565 or 1570 ~1605

Typical excess loss (dB)

0.07

0.10

0.07

0.10

Insertion loss (dB)

50/50

≤3.4

≤3.6

≤3.35

≤3.5

45/55

≤4.1/3.1

≤4.3/3.3

≤4.0/3.0

≤4.2/3.2

40/60

≤4.4/2.6

≤4.7/2.8

≤4.4/2.55

≤4.6/2.7

35/65

≤5.2/2.3

≤5.5/2.5

≤5.1/2.2

≤5.3/2.4

33/67

≤5.4/2.2

≤5.7/2.3

≤5.3/2.1

≤5.5/2.25

30/70

≤5.7/1.9

≤6.0/2.0

≤5.7/1.85

≤5.9/1.95

25/75

≤6.6/1.7

≤7.0/1.8

≤6.5/1.65

≤6.8/1.75

20/80

≤7.6/1.25

≤8.0/1.3

≤7.55/1.25

≤7.8/1.3

15/85

≤9.2/1.0

≤9.6/1.2

≤9.0/1.0

≤9.3/1.1

10/90

9.55~10.65/≤0.65

9.3~10.9/≤0.8

9.55~10.60/≤0.65

9.35~10.85/≤0.8

5/95

12.40~13.80/≤0.4

12.10~14.10/≤0.5

12.45~13.75/≤0.4

12.15~14.05/≤0.45

3/97

14.50~16.15/≤0.3

14.15~16.50/≤0.4

14.55~16.10 /≤0.3

14.20~16.45/≤0.35

2/98

16.10~18.05/≤0.25

15.70~18.45/≤0.35

16.2~17.95/≤0.25

15.80~18.35/≤0.3

1/99

19.05~21.15/≤0.2

18.55~21.65/≤0.3

19.1~21.1 /≤0.2

18.65~21.55/≤0.3

PDL (dB)

≤0.10

≤0.15

≤0.10

≤0.15

Directivity   (dB)

≥55

Operating temperature (℃)

-40 ~ +85

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

Applications

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

Special Wavelength Coupler

Besides 1310nm and 1550nm fiber couplers, we  manufacture special couplers with work at wavelengths of 473nm, 532nm, 655nm, 850nm, 980nm,1064nm, 1625nm etc. These couplers use special single mode fibers.

Key Features

Applications

Parameter

Special Wavelengths   Coupler

Operating wavelength   (nm)

473

532

655

850

980

1064

1480

1625

Operating bandwidth   (nm)

±15

Coupling ratio

1/99 ~ 50/50

Fiber type

460-HP

630-HP

HI780C

780-HP

HI1060flex

SMF-28e

Typical excess   Loss(dB)

P

0.8

0.5

0.3

0.15

0.1

0.1

A

1.0

0.7

0.4

0.2

0.15

0.15

Directivity (dB)

≥50

Operating temperature   (℃)

-40 ~ +85

1×N (N×N) Monolithic Multi-Mode Coupler

Multimode fiber couplers (MMC) are used for multimode fiber LAN systems. We offer a series of  MMC with low insertion loss, high reliability.

Speifications

Parameter

1×2 (2×2)MMC

P

A

Operating wavelength (nm)

850 or 1310, others on request

Operating bandwidth (nm)

±40

Typical excess loss (dB)

0.4

0.7

Insertion loss (dB)

50/50

≤3.7/3.7

≤4.0/4.0

40/60

≤4.7/2.7

≤5.0/3.0

30/70

≤6.0/2.1

≤6.3/2.4

20/80

≤7.8/1.4

≤8.1/1.7

10/90

≤11.2/0.9

≤11.6/1.2

5/95

≤14.5/0.7

≤15.0/1.0

2/98

≤18.6/0.6

≤19.4/0.9

1/99

≤22.0/0.5

≤22.8/0.8

Uniformity (50/50)   (dB)

≤0.5

≤0.8

Directivity (dB)

≥40

Operating   temperature (℃)

-40 ~ +85

Fiber type (μm)

50/125 or   62.5/125 Multi-Mode or others

 

           Parameter

1×3 MMC

3×3 MMC

1×4 MMC

Operating wavelength(nm)

850 or   1310, others on request

Operating bandwidth (nm)

±40

Grade

P

A

P

A

P

A

Typical excess loss (dB)

0.7

1.0

1.0

1.3

0.9

1.2

Insertion loss (dB)

≤6.0

≤6.3

≤6.3

≤6.6

≤7.8

≤8.3

Uniformity (dB)

≤0.6

≤0.9

≤1.2

≤1.6

≤1.2

≤1.5

Directivity (dB)

≥40

Operating temperature (℃)

-40 ~ +85

Fiber type (μm)

50/125 or   62.5/125 Multi-Mode or others

Single Mode Coupler

    SMC SMC SMC SMC Single Mode Dual Window Wavelength Flattened Coupler (SDC)
Number of ports                  
Center Wavelength (λc) nm 1064       1310 and 1550      
Operating Wavelength Range nm ±20       ±40      
Coupling Ratio   01/99 05/95 10/90 50/50 01/99 05/95 10/90 50/50
Max. Insertion Loss at 23℃   21.5/0.2 14.6/0.4 10.8/0.6 3.4 23.5/0.3 15.2/0/4 11.3/0.6 3.6
Max PDL (Tap/Through Port)   0.3/0.05 0.3/0.05 0.25/0.05 0.05 0.15      
Max. Excess Loss   0.15       0.1      
Thermal Stability   <=0.002dB/℃ over -5℃ to +70℃       <=0.002dB/℃ over -5℃ to +70℃      
Min. Directivity 1x2 50dB       55dB      
  2x2 65dB       65dB      
Max. Optical  Power (CW) mW 500       500      
Max. Tensile Load N 5       5      
Fiber Type   SMF-28e       SMF-28e      
Operating Temperature -5 to +50       -5 to +70      
Storage Temperature -40 to +85       -40 to +85      
Package Dimensions   250um Bare Fiber and dia.3.0mmx40mm 900um Loose Tube and dia. 3.0mmx56mm 3mm Loose Cable and 90mmx16mmx9mm

Near Infrared Coupler

The Near Infrared Coupler splits light at any selected wavelength from 700nm to 1150nm. Designed for applications in fibre laser, sensor and avionics applications, the coupler utilizes G&H’s low loss fused fibre technology. No light leaves the fibre and therefore no alignment is required; and there are no unwanted reflections. Furthermore the output fibre pigtails may be directly integrated into beam delivery systems.  For components and modules which combine different wavelengths within the near infrared region please refer to the datasheet ‘Near Infrared WDM’.

Key Features:

Applications:

Optical Specifications

Coupling Ratio (%)3 Grade Available Wavelength(s) Available Housing  Option Signal Path Insertion Loss (dB)1,2 Tap Path Insertion Loss (dB)1,2
1 A 700 to 1150nm 3,4,5,6 0.15 24.9
1 B 700 to 1150nm 3,4,5,6 0.20 25.3
5 A 700 to 1150nm 3,4,5,6 0.40 15.9
5 B 700 to 1150nm 3,4,5,6 0.50 16.2
10 A 700 to 1150nm 3,4,5,6 0.9 12.2
10 B 700 to 1150nm 3,4,5,6 1.1 12.4
20 A 700 to 1150nm 3,4,5,6 1.5 8.4
20 B 700 to 1150nm 3,4,5,6 1.7 8.6
30 A 700 to 1150nm 3,4,5,6 2.2 6.4
30 B 700 to 1150nm 3,4,5,6 2.4 6.4
40 A 700 to 1150nm 3,4,5,6 3.0 4.9
40 B 700 to 1150nm 3,4,5,6 3.2 5.1
50 A 700 to 1150nm 3,4,5,6 3.8 3.8
50 B 700 to 1150nm 3,4,5,6 4.0 4.0
  1. In 2x2 couplers insertion loss is not specified for launch through second input port P4 (coloured blue)
  2. Maximum insertion loss at operating wavelength. Not including TDL, PDL or connector losses.
  3. Any coupling ratio available. Please contact us for specifications of coupling ratios not listed.
Parameter Specification Unit
Operating Wavelength Specified wavelength within the range 700-1150nm nm
Operating / Storage Temperature Range -40 to +75 / -40 to + 85 oC
Pigtail Tensile Load 5 N
Fibre Type Speciality singlemode fibre  
1. For connectorised component, operating temperature range is –5 to +75oC.

Housing Option

Housing Code Description 1x2, 2x2 Dimension(mm) Pigtail
3 Regula 3.0 (f) x 50 (L) Primary-coated fibre
4 f0.9 mm slim 3.0 (f) x 60 (L)  f0.9mm loose-tube
5 f0.9 mm semi-ruggedised 5.0 (f) x 75 (L) f0.9 mm loose-tube
6 f3.0 mm fully-ruggedised 80(L)x10(W)x8(H) f3.0 mm fan-out sleeving

Configuration

Ordering Code Information

  1. FFS-780K31A10 (Fused Fibre Speciality Coupler, 780nm, 50/50 coupling ratio, regular housing, 1x2, A grade, 1m pigtails, no connectors)
  2. FFS-060K31A10 (Fused Fibre Speciality Coupler, 1060nm, 50/50 coupling ratio, regular housing, 1x2, A grade, 1m pigtails, no connectors)

  1. Minimum pigtail length. Further pigtail lengths available on request. Where connectorised, pigtail length is to connector end face.
  2. Insertion Loss in specification table does not include connector losses.
  3. Any coupling ratio available. Please contact G&H for ordering codes of coupling ratios not listed.
  4. LC connector not available for housing code 6, fully ruggedised housing.
  5. Connectors may be fitted to housing types 4, 5 and 6. For connectorisation of housing type 3 please contact the sales office.

PM Coupler

Our PM Coupler enables the accurate monitoring and splitting of optical signals in polarisation maintaining fibre. Manufactured using industry-standard PM fibre, the PM Coupler is available in any coupling ratio from 1% to 50%. Based on G&H’s fused fibre technology, the PM Coupler demonstrates very low loss, high power handling and there is no price penalty for adding a second input port. The centre operating wavelength may be chosen from within a wide variety of operating passbands, including 980, 1064, 1310, 14xx, 15xx and 16xx.

In common with all PM components, it is necessary to launch into either the slow or the fast axis to maintain polarisation. For the PM Coupler, specifications are based on slow axis launch, although fast axis versions are also available if requested.

Key Features:

Applications:

Optical Specifications1

Parameter Specification Unit
Centre Wavelength Range 9xx 10xx 1310 14xx 15xx 16xx nm
Available Wavelengths2 915-999 1000-1099 1310 1425-1499 1500-1599 1600-1650 nm
Coupling Ratio 1/99 %
Coupling Ratio Tolerance +/- 0.5 %
Extinction Ratio3, Grade A 20 20 20 20 20 20 dB
Extinction Ratio3, Grade B 17 17 17 17 17 17 dB
Coupling Ratio 5/95 %
Coupling Ratio Tolerance +/- 1.5 %
Extinction Ratio3, Grade A 20 20 20 20 20 20 dB
Extinction Ratio3, Grade B 17 17 17 17 17 17 dB
Coupling Ratio 10/90 %
Coupling Ratio Tolerance +/- 3.0 %
Extinction Ratio3, Grade A 20 20 20 20 20 20 dB
Extinction Ratio3, Grade B 17 17 17 17 17 17 dB
Coupling Ratio 33/67 %
Coupling Ratio Tolerance +/- 4.0 %
Extinction Ratio3, Grade A 20 20 20 20 20 20 dB
Extinction Ratio3, Grade B 17 17 17 17 17 17 dB
Coupling Ratio 50/505 %
Coupling Ratio Tolerance +/- 5.0 %
Extinction Ratio3, Grade A 20 20 20 20 20 20 dB
Extinction Ratio3, Grade B 17 17 17 17 17 17 dB
Excess Loss Grade A 0.3 0.3 0.3 0.3 0.3 0.3 dB
Excess Loss Grade B 0.5 0.5 0.5 0.5 0.5 0.5 dB
Return Loss/Directivity 50 dB
Pigtail Tensile Load 5 N
Operating Temperature -5 to +751 oC
Storage Temperature -40 to +85 oC
Fibre Type Polarisation maintaining fibre (industry-standard profile)  
  1. All specifications are for operation at room temperature.
  2. The centre wavelength may be selected from within the available wavelength ranges supplied.
  3. Defined for signal path P1-P2.
  4. Defined for both signal path P1-P2 and tap path P1-P3.
  5. Preliminary specifications.

Ordering Code Information

Example: FFP-CK3250A10 (C band, PM Coupler, 50/50 coupling ratio, regular housing, 2x2, channel centre =1550nm, grade A, 1m pigtail, no connector)

  1. Channel centre must be within the wavelength ranges shown in the Optical Specifications table.
  2. Minimum pigtail length. Other pigtail lengths are available on request.
  3. Optical specifications in specification table do not include connector loss. Other connectors available on request.
  4. Other coupling ratios available on request.
  5. PM Products are manufactured using 250μm PANDA PM fibre, 400μm PANDA PM fibre available at wavelengths higher than 1400nm.

PM Low Ratio Tap Coupler

Our Fused PM LRT, taps off low power from a signal path whilst maintaining polarisation through the component. Our proprietary PM manufacturing technology provides tap ratios as low as 0.01% with ultra low loss and high polarisation extinction ratio. The all fibre construction and excellent loss characteristics provide exceptional reliability at high powers. PM LRT’s also exhibit improved tap ratio stability when input polarisation extinction ratio levels are low or fluctuating.

These high performance parts are available at a range of wavelengths with different fibre options. PM LRTs can therefore be readily specified in a wide variety of applications, enabling rapid design cycles and new project builds.

Standard parts are available at wavelengths from 900 – 1600nm. For other wavelengths or coupling ratios please contact the sales office.

Key Features:

Applications:

Optical Specifications

Parameter Specification3 Unit
Coupling Ratio 0.01 0.1 1 5 10 %
Tap Insertion Loss1 36 -44 27-33 18.2-23 11.9-14.9 8.86-1.85 dB
Signal Insertion Loss1 0.3(Typ<0.1) 0.3 (Typ<0.1) 0.37 0.6 0.9 dB
1300 – 1600 Signal PER2 >20 dB
900 – 1100 Signal PER2 >20 dB
Return Loss >55 NA
Operating Wavelength4 Any Wavelength from 900-1100nm and 1300-1600nm NA
Housing Regular Ø3.0 x 60 (max)  
Fibre Type PM PANDA Fibre  
  1. Insertion Loss at operating wavelength. Not including TDL.
  2. Devices manufactured to operate in fast axis as standard. For use in a slow-axis system a 90° PM splice is required.
  3. Specifications shown are for operation at room temperature.
  4. The centre wavelength may be selected from within the available wavelength range supplied.
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