OADM Combiner and Circulator
Overview
The optical add/drop multiplexer (OADM) combiner can be logically divided into a transmit device and a receive device, which work together to add/drop fixed wavelengths to/from the multiplexed signals. The OADM combiner features low insertion loss, flexible capacity expansion, and low cost, reducing the usage of long-distance optical fibers.
A circulator is used with an OADM combiner. The circulator can separate signals from each other by implementing unidirectional transmission of high-frequency signals and controlling the transmission of electromagnetic waves along a certain ring.
The OADM combiner and circulator are passive devices (can be used without power supply). Table 1 lists the models of OADM combiners and circulators.
Type |
Model |
Description |
|---|---|---|
OADM combiner |
OADM-OC-00 | OADM module - 18 channels - indoor - integrated circulator |
OADM combiner |
OADM-00-00 | OADM module - 18 channels - outdoor |
Circulator |
OC-1270-1380-00 | Optical circulator - 1270 nm - 1380 nm |
Circulator |
OC-1381-1500-00 | Optical circulator - 1381 nm - 1500 nm |
Circulator |
OC-1501-1620-00 | Optical circulator - 1501 nm - 1620 nm |
Appearance
Figure 1 and Figure 2 shows the appearances of the OADM combiner.
Figure 3 shows the appearance of a circulator.
Application Scenario
The OADM combiner and circulator are mainly used between switches and end users. They are used with GE-CWDM eSFP Optical Modules (Used Only in the OADM scenario) to implement GE fiber to the home (FTTH).
The following lists the cable requirements for connections of devices and components:
- The switch and OADM-OC-00 are installed in the indoor equipment room: The switch is connected to the combiner using the CWDM optical module, and the LC/PC optical fiber is used.
- The OADM-00-00 is installed in an outdoor cabinet near the user side: The OADM-00-00 and OADM-OC-00 are connected through a long-distance LC/APC optical fiber, reducing the number of long-distance optical fibers.
- The circulators are installed indoors: The circulators are connected to the OADM-00-00 using LC/APC optical fibers.
- The CWDM optical modules are installed on the user terminals: The CWDM optical modules are connected to circulators using LC/PC optical fibers.
Port Description
| 1 | COM port NOTE:
The combination port of the OADM-OC-00 is connected to that of the OADM-00-00 using the LC/APC optical fiber. |
2 | 18-channel optical ports with different wavelengths NOTE:
The 18-channel optical ports are connected to CWDM optical modules on the switches using the LC/PC optical fibers. The wavelength ID on the interface must match that of the optical module. The TX port is connected to the RX port on the CWDM optical module, and the RX port is connected to the TX port on the CWDM optical module. |
| 3 | TAP port NOTE:
The detection ports are connected using the LC/PC optical fibers. The IN port is used to detect 18-channel CWDM optical paths, and the OUT port is used to detect the optical path on the COM port. |
- | - |
| 1 | COM port NOTE:
The combination port of the OADM-00-00 is connected to that of the OADM-OC-00 using the LC/APC optical fiber. |
2 | 18-channel optical ports with different wavelengths NOTE:
The optical ports are connected to the user-side circulators using LC/APC optical fibers. The wavelength ID on the interface must match that of the circulator. |
| 3 | TAP port NOTE:
The detection ports are connected using the LC/PC optical fibers. The IN port is used to detect 18-channel CWDM optical paths, and the OUT port is used to detect the optical path on the COM port. |
- | - |
| 1 | COM port NOTE:
This port can be connected to the 1271, 1291, 1311, 1331, 1351, and 1371 ports of the OADM-00-00 using the LC/APC optical fibers. |
2 | TX port NOTE:
This port is connected to the RX port of the CWDM optical module using the LC/PC optical fiber. |
| 3 | RX port NOTE:
This port is connected to the TX port of the CWDM optical module using the LC/PC optical fiber. |
- | - |
| 1 | COM port NOTE:
This port can be connected to the 1391, 1411, 1431, 1451, 1471, and 1491 ports of the OADM-00-00 using the LC/APC optical fibers. |
2 | TX port NOTE:
This port is connected to the RX port of the CWDM optical module using the LC/PC optical fiber. |
| 3 | RX port NOTE:
This port is connected to the TX port of the CWDM optical module using the LC/PC optical fiber. |
- | - |
| 1 | COM port NOTE:
This port can be connected to the 1511, 1531, 1551, 1571, 1591, and 1611 ports of the OADM-00-00 using the LC/APC optical fibers. |
2 | TX port NOTE:
This port is connected to the RX port of the CWDM optical module using the LC/PC optical fiber. |
| 3 | RX port NOTE:
This port is connected to the TX port of the CWDM optical module using the LC/PC optical fiber. |
- | - |
Technical Specifications
Table 2 lists technical specifications of OADM combiners and circulators.
Item |
Description |
|---|---|
Dimensions (H x W x D) |
|
Operating temperature |
|
Storage temperature |
-40°C to +85°C (-40°F to +185°F) |
Relative humidity |
5% to 95%, noncondensing |
Device attribute |
Passive |
Supported CWDM wavelength (nm) |
|
Part number |
|