Project Description

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.

Features Applications
  • Low excess loss
  • Low PDL
  • Three operating windows
  • High stability and reliability
  • Optical communication systems
  • CATV
  • FTTH

Performance Specifications

Parameter Unit Values
Grade – 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 50/50 dB ≤3.6 ≤3.8
45/55 dB ≤4.2/3.2 ≤4.4/3.4
40/60 dB ≤4.7/2.7 ≤4.9/2.9
35/65 dB ≤5.4/2.4 ≤5.7/2.6
33/67 dB ≤5.7/2.2 ≤6.0/2.4
30/70 dB ≤6.0/1.9 ≤6.3/2.1
25/75 dB ≤7.0/1.7 ≤7.3/1.9
20/80 dB ≤7.9/1.3 ≤8.4/1.4
15/85 dB ≤9.5/1.0 ≤10.0/1.2
10/90 dB 9.20~11.00/≤0.75 8.80~11.40/≤0.8
5/95 dB 12.05~14.20/≤0.4 11.55~14.65/≤0.5
3/97 dB 14.10~16.50/≤0.35 13.60~17.05/≤0.45
2/98 dB 15.60~18.55/≤0.3 15.00~19.20/≤0.4
1/99 dB 18.45~21.70/≤0.25 17.80~22.40/≤0.35
PDL dB ≤0.15 ≤0.20
Directivity dB ≥55
Maximum Power Handling W 2
Operating temperature ℃ -40 ~ +85
  1. Above specification are for device without connector, and may change without notice. All parameters are tested at room temperature.
  2. Other specifications can be made on customer request.
  3. For devices with connectors, IL will be 0.3dB higher, RL will be 5dB lower. The pass optical power is 2 W only for connector added.
  4. If there is pulse application, please be sure to inform us of pulse energy and peak power.
  5. Insertion Loss around 1383nm (water peak) is counted in the specifications above.

Package Dimension

Configuration 1×2 or 2×2
Fiber lead length 1 meter, others on request
Fiber type 250μm bare fiber 900μm loose tube 900μm/2mm/3mm loose tube
Dimensions (Ф×L)(mm) Ф3.0×54 Ф3.0×54 90mm×14mm×8.5mm
Ф3.0×40
  1. Other package dimensions can be made on customer request.

Order information  P/N: FBTC-①-②-③-④-⑤-⑥-⑦-⑧-⑨-⑩

When you inquire, please provide the correct P/N number according to our ordering information, and attach the appropriate description would be better. If need any connector, we do not recommend choosing a 250μm bare fiber pigtail. For mini size coupler, typical applications are bare fibers without connector.

① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩
Type Grade Port Wavelength Coupling Ratio (%) Fiber Type Pigtails

Diameter

 Fiber Length Connector Package
TWC P: P Grade

A:A Grade

 102:1×2

202:2×2

 131415:1310&1490&1550nm 50:50/50

40:40/60

30:30/70

20:20/80

10:10/90

05:5/95

02:2/98

01:1/99

XX: Others

 S28:SMF-28

X:Others

 25:250μm

90:900μm

20:2.0mm

30:3.0mm

XX: Others

 05:0.5m

10:1.0m

15:1.5m

XX: Others

 00:None

FP: FC/PC

FA: FC/APC

SP: SC/PC

SA: SC/APC

ST: ST/PC

LP: LC/PC

LA: LC/APC

XX: Others

 3.0×40

3.0×54

90x14x8.5

Part Number Example: FBTC-TWC-P-202-151415-02-S28-25-10-00-3.0×54

Description: 2×2 three window coupler, P grade, 1310&1490&1550nm, 2/98 coupling ratio, SMF-28e fiber, with bare fiber, 1.0m length fiber pigtails, without connector. 3.0X54 package.

Ordering Information for Custom Parts

If you need to customize other specifications, please provide detailed description for your requirement.

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