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PBS/PBC

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850nm Polarization Beam Combiner/Splitter

The 850nm Polarization Beam Combiner/Splitter can be used either as a polarization beam combiner to combine light beams from two PM input fibers into a single output fiber, or as a polarization beam splitter to split light from an input fiber into two output fibers of orthogonal polarization states. The most common application is to combine the light of two pump lasers into one single fiber to double the pump power in fiber Amplifier.

Features

  • Low Insertion Loss
  • High Extinction Ratio
  • Compact In-Line Package
  • High Stability and Reliability

Applications

  • Polarization MUX/Demux
  • High power fiber laser
  • Optic sensor system
  • Coherent Telecommunication Systems
  • Polarization Mode Dispersion Compensator

The 850nm Polarization Beam Combiner/Splitter can be used either as a polarization beam combiner to combine light beams from two PM input fibers into a single output fiber, or as a polarization beam splitter to split light from an input fiber into two output fibers of orthogonal polarization states. The most common application is to combine the light of two pump lasers into one single fiber to double the pump power in fiber Amplifier.

DK Photonics offers a large selection of PBS/C. These devices can handle powers rang from 300mW to 10W or other on request, and have center operating wavelengths ranging from 500 nm to 2050nm. If you do not see a standard Polarization Beam Combiner/Splitter that meets your needs, we welcome the opportunity to review your desired specification and quote a custom Polarization Beam Combiner/Splitter. Requests for custom fiber pigtails, different wavelengths and handling power of operation or other specific needs will be readily addressed.

 

1x2-PBS-principle-micro-prism

Performance Specifications

PARAMETER
UNIT
VALUE
Grade
–
P
Operating wavelength
nm
850,905
Operating bandwidth
nm
±20
Typical insertion loss
dB
0.70
Max. insertion loss
dB
0.90
Min. Extinction Ratio(for PBS only)
dB
20
Return loss
dB
>50
Directivity
dB
>50
Max. Power Handling
W
0.5, 1, 2, 3, 5, 10
Tensile Load
N
< 5
Fiber Type
Port 1&Port2
–
PM780-HP
Port 3
–
780-HP, or PM780-HP
Operating temperature
℃
-5 ~ +70
Storing temperature
℃
-40 ~ +85
Package dimension
mm
Ø5.5 x 35 or customer specified
  1. Above specifications are for device without connector. 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. The default connector key is aligned to slow axis. Power transmits through the connector less than 2W.
  3. For >5W high power applications, we will use heat sink package, contact DK Photonics for details.
  4. Since the light is bidirectionally reversible, PBC can also be used as PBS.

Package Dimension

ISO+Polarization Beam Splitter

 

ISO+Polarization Beam Combinber

Order information

P/N: PBC/PBS-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 Operating Wavelength Power Handling (Total) Fiber type (Port3) Pigtails Diameter Fiber Length Connector
P:P
85:850nm
905:905nm
XX: Others
L:<0.5W
1:1W
2:2W
5:5W
10:10W
1:SM fiber
2:PM fiber, slow axis 45° to port 1
3:PM fiber, slow axis aligned to port 1
25:250μm
90:900μm
XX: Others
08:0.8m
10:1.0m
XX: others
00: None
FP: FC/PC
FA: FC/APC
LA: LC/APC
XX: Others
Part Number Example: PBC-P-85-2-1-90-10-00

Description: 850nm Polarization Beam Combiner, 2W power, P grade, 780-HP fiber at port 3, with 0.9mm OD loose tube, 1.0m fiber length, and no connectors at all ports.

Ordering Information for Custom Parts:

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

More Details Regarding Routing path:

Polarization Beam Combiner/Splitter

Polarization Beam Combiner:

Routing path is from port 1, 2 to 3, Here are three options of polarized state from Port 1, 2 to Port 3
Option 1:PM to SM fiber Port 1: 50%, Linear polarized light in, through slow axis,

Port 2: 50%, Linear polarized light in, through slow axis

Port 3, 100%, Circularly polarized light Out,
Option 2: PM to PM fiber, port 1 is slow axis 0° aligned to port 3 Port 1, 2, only work through slow axis, blocked the fast,

The slow axis of port 1 is aligned to the slow axis of port 3,

The slow axis of port 2 is aligned to the fast axis of port 3,
Option 3:PM to PM, port 1 is slow axis 45° aligned to port 3 Port 1, 2, only work through slow axis, blocked the fast,

Port 1 or 2, 100%, Linear polarized light in, through slow axis,

Port 3, 25% linear polarized light out, through slow axis, and 25% by the fast,
Polarization Beam Splitter:

Routing path is from port 3 to 1,2, Here are three options of polarized state from Port 3 to Port 1 & 2
Option 1: SM to PM fiber Port 3, Circularly polarized light in,

Port 1: 50%, Linear polarized light out, through slow axis,

Port 2: 50%, Linear polarized light out, through slow axis
Option 2: PM to PM, port 3 is slow axis 0° aligned to port 1 1.      Port 3, Linearly polarized light in, through slow axis,

Port 1: 100%, Linear polarized light out, through slow axis, Port 2: 0%

2.      Port 3, Linearly polarized light in, through fast axis,

Port 1: 0%, Port 2: 100%, Linear polarized light out, through slow axis
Option 3: PM to PM, port 3 is slow axis 45° aligned to port 1 1.      Port 3, Linearly polarized light in, through slow axis,

Port 1: 50%, Linear polarized light out, through slow axis, Port 2: 50%, Linear polarized light out, through slow axis

2.      Port 3, Linearly polarized light in, through fast axis,

Port 1: 50%, Linear polarized light out, through slow axis, Port 2: 50%, Linear polarized light out, through slow axis