DK Photonics uses unique fusing technique and polarization maintaining fiber to build the 3×3 monolithic fused PM fiber standard splitter. The coupling ratio could be selected according to customer’s request. It features low excess loss, small size and high polarization extinction ratio. 3×3 monolithic fused PM fiber standard splitter is widely used for optical sensors and optical gyro.

If you do not see a standard PM Fused Coupler that meets your needs, we welcome the opportunity to review your desired specification and quote a custom PM fused Coupler. Requests for custom fiber pigtails, different wavelengths, tap Ratio and handling power of operation or other specific needs will be readily addressed.

Features Applications
·         Low Insertion Loss

·         High Extinction Ratio

·         Compact In-Line Package

·         Available for Slow or Fast Axis Operation

·         High Stability and Reliability

 ·         Fiber Optic Instruments

·         Fiber Amplifiers

·         Fiber Sensors

·         Coherent Detecting

·         Research

Performance Specifications

Parameter Unit Values
Port Configuration – 3×3
Splitting Ratio % 33/33/33
Grade – Premium A grade Premium Premium
Central Wavelength(mm) nm 780,830,980,1064 1310,1480,1550,2000
Bandwidth(mm) nm ±10 ±20
Excess Loss(dB) Typ. dB 0.8 1.0 0.6 0.8
Max. dB 1.0 1.2 0.8 1.0
PER for Through Port dB ≥17 ≥15 ≥17 ≥15
Splitting Ratio Tolerance (%) Max. % ±10 ±13 ±10 ±30
Directivity dB 50
Max. Power Handling W 0.5, 2, 3, 5,
Max. Tensile Load N 5
Fiber Type – Panda fiber or other
Operating Temperature(℃) – -5 ~ +70
Storage Temperature(℃) – -40 ~ +85
Dimensions (Ф×L) mm Ф4.0mm×70mm(0.9mm tube)

Ф3.0×54mm(bare fiber, without tube)
  1. Above specifications are for device without connector, and the PM fused coupler is both axis working, no axis can be blocked; default test extinction ratio is on the slow axis. All parameters are tested at room temperature.
  2. For devices with connectors, IL will be 0.3dB higher, RL will be 5dB lower and ER will be 2dB lower. Power transmits through the connector less than 2W. The default connector key is aligned to slow axis.
  3. For >10W high power applications, we will use heat sink package, contact DK Photonics for details.

4. If there is pulse application, please be sure to inform us of pulse energy and peak power.

Order information   P/N: PMFBTC-①-②-③-④-⑤-⑥-⑦

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.

① ② ③ ④ ⑤ ⑥ ⑦
Grade Port Operating Wavelength Power Handling Pigtails Diameter Fiber Length Connector
P: P grade

A: A grade

 303:3×3 78:780nm

83:830nm

98:980nm

30:1030nm

64:1064nm

13:1310nm

14:1480nm

15:1550nm

XX: Others

 L:<0.5W

2:2W

5:5W

 25:250μm bare fiber

90:900μm Loose tube

XX: Others

 08:0.8m

10:1.0m

XX: Others

 00: None

FP: FC/PC

FA: FC/APC

SP: SC/PC

SA: SC/APC

LP: LC/PC

LA: LC/APC

Part Number Example:  PMFBTC-S-P-303-15-L-90-10-FA

Description: 1550nm 3×3 Fused PM Fiber Splitter, slow axis working, P grade,0.5W, 33/33/33 coupling ratio, 1.0m PM panda fiber with 0.9mm OD loose tube, and FC/APC connectors at all ports.

Ordering Information for Custom Parts

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

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