Project Description

2μm 1×2(2×2) Polarization Insensitive PM Fused Coupler

Features Applications
·         Low Insertion Loss

·         High Extinction Ratio

·         Compact In-Line Package

·         Operating on both Fast and Slow Axis

·         High Stability and Reliability

 ·         Fiber Optic Instruments

·         Fiber Amplifiers

·         Fiber Sensors

·         Coherent Detecting

·         Research

Performance Specifications

Parameter Unit Values
Configuration – 1×2 or 2×2
Grade – P grade A grade
Center Wavelength nm 1940, 1970, 2000, 2050
Wavelength Range nm ±20
Excess Lose Typ. dB 0.4 0.6
Max. dB 0.6 0.8
Mini. PER for Through Port dB 20 18
Min. Directivity dB 55 50
Min. Return Loss dB 55 50
Thermal Stability dB/℃ ≤0.005
Max. Power Handling W 0.5, 2, 3, 5
Max. Tensile Load N 5
Fiber Type – PM1550 or Nufern PM 1950
Operating Temperature(℃) – -40 ~ +85
Storage Temperature(℃) – -40 ~ +85
Dimensions (Ф×L) mm Ф3.0×54, or Ф3.0×60

Max. Coupling Ratio Tolerance, @λc:

Coupling Ratio 1/99 2/98 5/95 10/90 20/80 30/70 40/60 50/50
Tolerance for P grade (%) ±0.5 ±0.6 ±0.8 ±1.2 ±2.0 ±2.5 ±2.5 ±3.5
Tolerance for A grade (%) ±0.6 ±0.8 ±1.0 ±2.0 ±2.5 ±3.5 ±3.5 ±5.0
  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 at central wavelength only.
  2. ER data listed in the table are for the ports with coupling ratio greater than 10%. It will be 2 dB lower for a tap port with coupling ratio between 1-10%. For 1% tap port, ER may be not considered. ER will be 2 dB lower for Nufern PM1950 fiber.
  3. 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.
  4. For >10W high power applications, we will use heat sink package, contact DK Photonics for details.
  5. If there is pulse application, please be sure to inform us of pulse energy and peak power.

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

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 ⑧ ⑨
Grade Port Operating Wavelength Power Handling Coupling Ratio Fiber Type for Tap Port (>5%) Fiber Diameter Fiber Length Connector
P: P grade

A: A grade

 102:1×2

202:2×2

 1940:1940nm

2000:2000nm

2050:2050nm

XX: Others

 L:<0.5W

2:2W

5:5W

10:10W

 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

 0:SM fiber

P15: PM1550 fiber for all port

P19: PM1950 fiber for all port

 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

XX: Others

Part Number Example #1: PMFBTC-P-202-13-L-50-1-90-10-FA

Description: 1310nm 2×2 PM Fiber Fused Coupler, P grade, 300mW, 50:50 coupling ratio, 1.0m PM panda fiber with 0.9mm OD loose tube, and FC/APC connectors at all ports.

Part Number Example #2: PMFBTC-P-102-14-L-20-1-90-10-FA

Description: 1480nm 1×2 PM Fiber Fused Coupler, P grade, 300mW, 20:80 coupling ratio, 1.0m PM panda fiber with 0.9mm OD loose tube, and FC/APC connectors at all ports.

Part Number Example #3: PMFBTC-P-202-15-L-10-1-90-10-FA

Description: 1550nm 2×2 PM Fiber Fused Coupler, P grade, 300mW, 10:90 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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