100G ZR Single-Fiber Dual-Laser QSFP28 DCO Ind. Transceiver: 100G-Q28-DCO-ZRSFI
100G ZR Single-Fiber Dual-Laser QSFP28 DCO Industrial Overview
The 100G-Q28-DCO-ZRSFI is the industrial-temperature version of the 100G ZR dual-laser coherent QSFP28 DCO module for single-fiber transmission. Its transmit laser and receive local oscillator tune independently across the full C-band on a 50GHz grid (channels 13.5-61, 96 channels total) at 27.95 GBd DP-DQPSK, so each direction can run on its own wavelength and share a single strand of SMF through an external circulator or a single-fiber DWDM mux at each end. This is not a BiDi module in the traditional WDM sense: there is no built-in optical filter and no Side A/B designation, and the port itself is duplex LC. Single-fiber coherent modules of this kind are nonetheless sometimes marketed as a "BiDi DCO," since they achieve bidirectional transmission over one fiber using two independently tunable lasers rather than a filter. Reach is up to 80km unamplified, 120km amplified, and up to 300km with amplification and the extended chromatic-dispersion mode enabled (6.0 ns/nm, +0.2W). OSNR tolerance is 16.5dB/12.5GHz and end-to-end latency is 24 microseconds or less. Rated for -20C to 85C long-term operation with cold start-up down to -40C. Application (100GBASE-ZR or OTU4) is selected via CMIS, and the module meets IEC 62368-1 and is aligned with ITU-T G.698.2. The host port must support 8W QSFP28 modules, CMIS, and the module's extended front section (QSFP-DD Type 2A profile outside the cage). Compatibility with specific host platforms is available on request.
- Media Type: Single-Mode Fiber (SMF)
- Connector: Double LC/UPC
- Fiber Count: Duplex
- Maximum Distance: 300 km
- Average Link Budget: 23.5 dB
- Tx Wavelength: DWDM 96Ch (C-band 50Ghz)
- Supported Data Rate: 103.125 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Built-in FEC
- Temperature Range: Industrial -20°C - +85°C
100G ZR Coherent DCO Industrial Pricing
SKU:100G-Q28-DCO-ZRSFI-MS100G-Q28-DCO-ZRSFI-MS
Special Order - Up to 4 WeeksSpecial Order - Up to 4 Weeks100G ZR Single-Fiber Dual-Laser QSFP28 DCO Ind. Transceiver Specification
Form Factor | QSFP28 |
Modulation | DP-DQPSK (Dual Polarization Differential Quadrature Phase Shift Keying) |
Media Type | Single-Mode Fiber (SMF) |
Connector | Double LC/UPC |
Fiber Count | Duplex |
Maximum Distance | 300 km |
Average Link Budget | 23.5 dB |
TX Wavelength | C-Band DWDM (Ch.13.5-61, 50GHz) |
RX Wavelength | C-Band DWDM (Ch.13.5-61, 50GHz) |
Supported Data Rate | 103.125 Gbps |
Supported Ethernet Applications | 100G Ethernet (103.125 Gbps) |
Optical Transport Network (OTN) Applications | OTU4 (112 Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Built-in FEC |
Transmitter Type | Dual tunable laser |
Tx Wave Bandwidth | 50 GHz grid (±1.8 GHz tuning accuracy) |
Average Launch Power (Min) Each Lane | -8 dBm |
Average Launch Power (Max) Each Lane | -5 dBm |
Receiver Type | ICR |
RX Wave Bandwidth | 50 GHz grid (±1.8 GHz tuning accuracy) |
Average Receiver Sensitivity (Min) Each Lane | -31.5 dBm |
Average Receiver Sensitivity (Max) Each Lane | 1 dBm |
Receiver Overload | 3 dBm |
Temperature Range | Industrial -20°C - +85°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 8 W |
Power | +3.3V single power supply |
Compliance | RoHS, IEEE 802.3-2022 100GBASE-ZR, ITU-T G.709.2, Class 1 FDA and IEC60825-1 Laser Safety Compliant, CMIS V5.2, OIF Coherent CMIS |
100G ZR Single-Fiber Dual-Laser QSFP28 DCO Ind. Transceiver Datasheet
v10Complete technical specifications and product details
100G ZR Single-Fiber Dual-Laser QSFP28 DCO Ind. Transceiver Description
Each direction tunes independently across the C band on a 50 GHz grid, spanning ITU channels 13.5 to 61 for a total of 96 channels, modulated at 27.95 GBd with DP-DQPSK and shaped by built-in forward error correction. Average launch power runs −8 to −5 dBm per lane, and receiver sensitivity extends to −31.5 dBm, giving a 23.5 dB average link budget to work with across the supported reach tiers.
OSNR tolerance of 16.5 dB over 12.5 GHz and end-to-end latency of 24 microseconds or less hold up across all three distance classes: up to 80 km unamplified, 120 km with optical amplification, and up to 300 km with amplification when the module's extended chromatic dispersion mode is enabled. This mode is optional and disabled by default, raising CD tolerance to 6.0 ns/nm at the cost of roughly 0.2 W additional power draw when turned on.
Long-term operation is rated for −20°C to 85°C, the industrial temperature class in this product line. Cold start-up is supported down to −40°C, but that figure covers power-up only, not sustained operation at that floor.
Electrically the module presents a standard QSFP28 CAUI-4 interface and draws up to 8W, but its front section extends beyond a standard QSFP28 outline to a QSFP-DD Type 2A profile outside the cage, so the host slot needs the matching clearance. CMIS selects between 100GBASE-ZR and OTU4 operation, and the host must support CMIS and 8W QSFP28 modules.
Compatibility with specific host platforms is available on request; contact our sales team for platform validation details.
Frequently Asked Questions
Can the 100G-Q28-DCO-ZRSFI operate over a single strand of fiber?
Yes, but only with external optics. The transmit laser and the receive local oscillator tune to independent ITU channels, so each direction can share one strand of single-mode fiber when paired with an external circulator or a single-fiber DWDM mux at both ends of the link. This is not a BiDi module. It has no built-in filter or Side A/B designation, and the port itself is a standard duplex LC.
What operating temperature range does the 100G-Q28-DCO-ZRSFI support?
Long-term operation is rated for the industrial range of −20°C to 85°C. Cold start-up down to −40°C is supported as a power-up condition only, not as a continuous operating point.
What host port requirements apply to this module?
The module uses a standard QSFP28 CAUI-4 electrical interface and needs up to 8W from the host, but its front section extends beyond the standard QSFP28 outline to a QSFP-DD Type 2A profile outside the cage, so the host slot must provide matching clearance. The host also needs CMIS support, since CMIS is how the module switches between 100GBASE-ZR and OTU4 operation. Platform-specific compatibility is available on request.
Is the 100G-Q28-DCO-ZRSFI a BiDi transceiver?
Not in the classic sense. Classic BiDi modules use a built-in WDM filter, fixed wavelengths and Side A/B pairs. This module uses two tunable lasers and a duplex LC port; single-fiber operation is done with an external circulator or mux. It's sometimes called a "BiDi DCO" in the market for that reason.