An optical add-drop multiplexer (OADM) is a device used in WDM systems that allows routing of different fiber channels into or out of a single mode fiber. It consists of an optical demultiplexer, multiplexer, and method to reconfigure signal paths. The demultiplexer separates wavelengths on input fiber to ports. OADMs can add or drop single or multiple wavelengths from a fully multiplexed signal, allowing intermediate sites on a fiber link to access the connection. Additional wavelengths can be added or dropped by successive OADMs as needed in the network.

1. 北京九州前程科技有限公司
Website:www.idcfiber.com email:sales@idcfiber.com
An optical add-drop multiplexer (OADM) is a device used in WDM systems for
multiplexing and routing different channels of fiber into or out of a single mode
fiber (SMF). The OADM module allows you to build complex networks
establishing dedicated channels between locations based on the use of
individual wavelength transmission. OADM consists of three stages: an optical
demultiplexer, an optical multiplexer, and between them a method of
reconfiguring the paths between the optical demultiplexer, the optical
multiplexer and a set of ports for adding and dropping signals. The optical
demultiplexer separates wavelengths in an input fiber onto ports. OADM
provides the ability to add or drop a single wavelength or multi-wavelengths
from a fully multiplexed optical signal. This allows intermediate locations
between remote sites to access the common, point-to-point fiber segment
linking them. Wavelengths not dropped pass-through the OADM and continue
on in the direction of the remote site. Additional selected wavelengths can be
added or dropped by successive OADMS as needed. CWDM OADM is
designed to optically add/drop one or multiple DWDM channels into one or
two fibers. Our CWDM OADM Modules include 1CH CWDM OADM, 2CH
CWDM OADM, and 4CH CWDM OADM. They are all available in Plastic ABS
Box, 19″ Rack Mount or LGX module package. Whether your network has 1
or 2 cores of fiber, redundant network, ring or linear network design etc, we
can offer various OADM configurations to tailor fit your network architect.

2. 北京九州前程科技有限公司
Website:www.idcfiber.com email:sales@idcfiber.com
The Optical Add/Drop Multiplexer(OADM) unit terminates a limited subset of
wavelengths in WDM systems. OADMs typically add/drop 1, 2 or 4
wavelengths and the remaining wavelengths are bypassed (expressed)
through the fiber. It's possible to reuse the terminated wavelengths on the
remaining span.
Signal paths in a 1 channel. OADM with wavelength reuse.
The ability to reuse wavelengths in OADMs enables network designers to
build redundant WDM networks. Portection switching is usually taken care of
in the client equipment.

3. 北京九州前程科技有限公司
Website:www.idcfiber.com email:sales@idcfiber.com
Point-to-Point link with two OADMs
Above picture illustrates a point-to-point system with two OADMs. The first
OADM creates one wavelength path from (a) to (b). The second OADM
generates two wavelength paths from (a) to (c) and (c) to (d). The 8 channel
mux/demux units have six remaining wavelength patch from (a) to (d).
Features:
RoHS 6/6 Compliant
Multi-Channel Add / Drop
Telcordia GR-1221 Compliant
Thin-Film-Filter(TFF) Based
Flat and Wide Passband
Low Insertion Loss
High Channel Isolation
Exceptionally Stable and Reliable
Low Polarization Dependent Loss
Epoxy-Free Optical Path
Applications
CWDM Systems

4. 北京九州前程科技有限公司
Website:www.idcfiber.com email:sales@idcfiber.com
Metro/Access Networks
Enterprise NetworksCATV Fiber Optic Links
Specification:
All specifications are without fiber connectors.
Center Wavelength in Short band (1270, 1290, 1310... or 1271, 1291, 1311..)
are available upon request.
LGX Box / 19’ Rack Packaging option is available upon request.

5. 北京九州前程科技有限公司
Website:www.idcfiber.com email:sales@idcfiber.com