19CH O+C-Band DWDM Module – 8CH O-Band 200 GHz + 11CH C-Band 100 GHz
The GracyFiber 19CH O+C-Band DWDM Module integrates eight O-band channels and eleven C-band channels into a single passive wavelength-division multiplexing platform. The O-band section uses 200 GHz channel spacing, while the C-band section uses 100 GHz spacing, providing 19 wavelength channels through one common optical interface.
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The supplied specification states that the optical performance values include the connectors.
Based on the specified O+C-band channel architecture, the module is suitable for:
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| Parameter | Specification |
|---|---|
| Product Type | 19CH O+C-Band DWDM Module |
| Total Channel Count | 19CH |
| O-Band Channels | 8CH |
| C-Band Channels | 11CH |
| Operating Wavelength Range | 1260–1360 nm & 1525–1575 nm |
| O-Band Channel Spacing | 200 GHz |
| C-Band Channel Spacing | 100 GHz |
| O-Band Passband | ±0.2 nm |
| C-Band Passband | ±0.11 nm |
| Insertion Loss, COM ↔ WDM Channels | ≤3.60 dB |
| Adjacent Channel Isolation | ≥25 dB |
| Non-Adjacent Channel Isolation | ≥35 dB |
| Directivity | ≥50 dB |
| Return Loss | ≥45 dB |
| Ripple | ≤0.5 dB |
| Polarization Dependent Loss | ≤0.2 dB |
| Polarization Mode Dispersion | ≤0.2 ps |
| Maximum Optical Power | 500 mW |
These values are specified with connectors included.
| Channel | Frequency | Center Wavelength |
|---|---|---|
| O284 | 228.40 THz | 1312.58 nm |
| O286 | 228.60 THz | 1311.43 nm |
| O288 | 228.80 THz | 1310.28 nm |
| O290 | 229.00 THz | 1309.14 nm |
| O292 | 229.20 THz | 1308.00 nm |
| O294 | 229.40 THz | 1306.85 nm |
| O296 | 229.60 THz | 1305.72 nm |
| O298 | 229.80 THz | 1304.58 nm |
| Channel | Frequency | Center Wavelength |
|---|---|---|
| C20 | 192.00 THz | 1561.42 nm |
| C21 | 192.10 THz | 1560.61 nm |
| C22 | 192.20 THz | 1559.79 nm |
| C23 | 192.30 THz | 1558.98 nm |
| C24 | 192.40 THz | 1558.17 nm |
| C25 | 192.50 THz | 1557.36 nm |
| C26 | 192.60 THz | 1556.55 nm |
| C27 | 192.70 THz | 1555.75 nm |
| C28 | 192.80 THz | 1554.94 nm |
| C29 | 192.90 THz | 1554.13 nm |
| C30 | 193.00 THz | 1553.33 nm |
The 19 specified center wavelengths and their corresponding frequencies are shown in the module layout on page 3 of the supplied specification.
| Parameter | Specification |
|---|---|
| Fiber Type | Ultra G657A1 |
| Fiber Protection | 0.9 mm loose tube |
| Fiber Color | COM: Black; Other ports: White |
| Fiber Length | 300 ±50 mm |
| Connector Type | LC/PC |
| Package Size | 120 × 80 × 14 mm |
| Package Material | Aluminum |
| Package Color | Black |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Operating Humidity | 5–95% RH |
The fiber, connector, package, and environmental data are specified on page 2.
| Item | Specification |
|---|---|
| Reliability | Compliant with Telcordia GR-1209 and GR-1221 |
| RoHS | RoHS 2.0 compliant |
These requirements are stated in the supplied product specification.
| Item | Current Product Configuration |
|---|---|
| Channel Count | 19CH |
| O-Band Configuration | 8CH, O284–O298 |
| C-Band Configuration | 11CH, C20–C30 |
| O-Band Spacing | 200 GHz |
| C-Band Spacing | 100 GHz |
| Fiber | G657A1 |
| Fiber Protection | 0.9 mm loose tube |
| Connector | LC/PC |
| Housing | Black aluminum |
| Package | 120 × 80 × 14 mm |
The GracyFiber 19CH O+C-Band DWDM Module combines two wavelength regions within one passive optical module. Its channel plan consists of eight O-band channels from O284 to O298 and eleven C-band channels from C20 to C30, giving a total of 19 wavelength channels connected through a common optical interface.
The two wavelength groups use different channel spacing. The O-band channels are arranged at 200 GHz intervals, covering specified center wavelengths from 1312.58 nm to 1304.58 nm. The C-band section uses 100 GHz spacing, with center wavelengths from 1561.42 nm to 1553.33 nm.
From a system perspective, the common port allows multiple O-band and C-band optical carriers to be multiplexed onto, or demultiplexed from, the same optical path. The specified maximum insertion loss is 3.60 dB, while adjacent- and non-adjacent-channel isolation are at least 25 dB and 35 dB respectively. Directivity is specified at ≥50 dB, return loss at ≥45 dB, PDL at ≤0.2 dB, and PMD at ≤0.2 ps.
The optical assembly is packaged in a 120 × 80 × 14 mm black aluminum housing. G657A1 fiber with 0.9 mm loose tube and LC/PC connectors is specified for the current configuration. The module is designed for operation from -20°C to +70°C, with a specified storage range of -40°C to +85°C.
This architecture is useful where a system must route multiple precisely defined wavelengths across both the O-band and C-band while maintaining a single integrated WDM module.
A transmission system may need to carry optical channels in both the O-band and C-band over a common optical path.
The module combines eight O-band wavelengths and eleven C-band wavelengths through the COM interface. At the opposite side of the link, a corresponding module can separate those wavelengths into their individual optical channels.
This configuration allows a single WDM platform to handle two separated wavelength regions without requiring independent O-band and C-band modules.
The module can be integrated into optical communication equipment requiring a defined set of O-band and C-band wavelength ports.
The 120 × 80 × 14 mm aluminum package, G657A1 pigtails, and LC/PC interfaces provide a defined mechanical and optical configuration for equipment-level integration.
For laboratory systems working with multiple wavelengths, the individual O284–O298 and C20–C30 ports provide access to specific optical channels while the COM port provides the combined optical path.
The documented frequency and wavelength plan allows optical engineers to identify the required channel during system setup and measurement.
The module provides 19 channels in total, consisting of 8 O-band channels and 11 C-band channels. The O-band channels are O284–O298, while the C-band channels are C20–C30.
The O-band section uses 200 GHz spacing, while the C-band section uses 100 GHz spacing. The specified passbands are ±0.2 nm for the O-band and ±0.11 nm for the C-band.
The current specification uses G657A1 single-mode fiber with 0.9 mm loose tube and LC/PC connectors. The housing is black aluminum with dimensions of 120 × 80 × 14 mm.
GracyFiber's passive optical component portfolio covers WDM-related products as well as fiber-array, MPO/MTP, polarization-maintaining, and other optical interconnect solutions.
For WDM projects, this allows engineering discussions to focus on parameters such as:
For a non-standard O+C-band channel plan, customers can provide the required wavelengths and optical specifications for technical evaluation.
| Related Product | Why It Is Related |
|---|---|
| O-Band DWDM Module | Relevant where only the O-band wavelength group is required |
| C-Band DWDM Mux/Demux | Suitable for systems using conventional C-band DWDM channels |
| CWDM Mux/Demux | Alternative wavelength-multiplexing solution where wider channel spacing is required |
| LWDM Module | Related to wavelength multiplexing in optical communication systems with a different wavelength grid |
| MWDM Module | Provides another wavelength-multiplexing architecture for system-specific channel plans |
| AAWG DWDM Module | Related high-channel-count wavelength multiplexing solution for dense optical networks |
For a quotation or engineering review of a 19CH O+C-Band DWDM Module, please provide:
GracyFiber can review the channel plan and optical interface requirements before quotation.