Product Bulletin
PRELIMINARY
The ACPM Series couplers divide light while
maintaining a high polarization extinction ratio.
They have one input port and two output ports of
polarization maintaining fiber and are available
with 50/50, 30/70, 10/90, 05/95, 2/98, and 1/99
splitting ratios. These couplers are based on a
beam splitting filter design. As shown in the
schematic, the polarized light from the input fiber
is partially reflected and transmitted by the filter
and refocused into the two output fibers. The use
of the beam splitter filter allows for consistent
output ratios over a broad operational wavelength
range. These devices guarantee extinction ratios
greater than 20 dB.
Configuration
ACPM Series
Polarization Maintaining Fiber
Splitter/Couplers
Key Features
Standard output ratios of 50/50, 30/70, 10/90,
5/95, 2/98, and 1/99
Operational wavelengths of 1310/1480/1550 nm
Typical excess loss of 0.5 dB
Typical return loss of 60 dB
Applications
Interferometers
Splitting light in PM fiber
Fiber gyroscopes
Coherent transmission systems
Sensor systems
Instruments
Dimensions
ACPM Series | 2
All information contained herein is believed to be accurate and is subject to change without notice. No responsibility
is assumed for its use. JDS Uniphase Corporation, its subsidiaries and affiliates, or manufacturer, reserve the right
to make changes, without notice, to product design, product components, and product manufacturing
methods. Some specific combinations of options may not be available. Please contact JDS Uniphase for
more information. ©JDS Uniphase Corporation. All rights reserved.
MKT-DS-0016 Rev.E 10/99 Printed in Canada
JDS Uniphase Corporation Tel 613 727-1303
570 West Hunt Club Road Fax 613 727-8284
Nepean (Ottawa), Ontario sales@ca.jdsunph.com
K2G 5W8 Canada www.jdsunph.com
PRELIMINARY
Ordering Information
Indicate your requirements by selecting one option from each configuration table. Please print the corresponding codes in the
available boxes to form your part number. For more information on this or other products and their availability, please
contact your local JDS Uniphase sales representative or JDS Uniphase directly at 613 727-1303, or by fax at 613 727-8284, or via
e-mail at sales@ca.jdsunph.com, or visit our Web site at www.jdsunph.com.
Sample: ACPM+13716NC
Specifications
Parameter Specification
Wavelengths 1310, 1480, or 1550 nm ±20 nm
Excess loss10.8 dB maximum, 0.5 dB typical
Return loss150 dB minimum, 60 dB typical
Extinction ratio2 (at room temperature) 20 dB minimum
Maximum optical power 100 mW
Splitting ratios (Output 1/Output 2) 50/50 ±5%, 30/70 ±5%, 10/90 ±2%, 5/95 ±1%, 2/98 ±0.2%, and 1/99 ±0.2%
Number of ports33
Fiber type Fujikura Panda 8/125/400 µm (900 µm) for 1550 nm
Fujikura Panda 7/125/400 µm (900 µm) for 1310 and 1480 nm
Fiber length 1.0 minimum
Dimensions (WxHxL) 5.6 x 5.6 x 38.1 mm with tabs (with 400 µm tight buffer fiber)
8.9 x 8.9 x 45.7 mm (with 900 µm loose tube buffer)
Operating temperature 0 to 50 °C
Storage temperature -20 to 70 °C
1. Excluding connectors.
2. Extinction ratio is defined as the ratio of the optical power launched into the two orthogonal axes of a PM fiber. The direction of linear polarization is aligned with the slow axis
of the fiber (axis through the stress rods).Due to the intrinsic properties of polarization maintaining fiber, a broadband source such as a LED is used to characterize the
extinction ratios.
3. Custom version with 4 ports or other wavelengths (980 nm) is available.
Note: These specifications are applicable over operating temperature unless otherwise specified.
Complimentary polarization products are available from JDS FITEL:
• Polarization beam splitter/combiners
• In-line polarizers
• Rotating polarizers
• Depolarizers
• Faraday rotator mirrors
1. Key of the FC connector is aligned with
the slow axis of the PM fiber.
ACPM+1
Code Connector Type1
NC No connector
FP FC/PC
FA FC/APC
Code Output Ports Ratio
11 50/50
37 30/70
19 10/90
59 5/95
29 2/98
09 1/99
Code Wavelength
2 1310 nm
4 1480 nm
1 1550 nm
Code Pigtail Type (all ports)
1 PM 400 µm tight buffer
6 PM 400 µm tight buffer with 900 µm PVC loose tube
