Specifications
The 1.25Gbps DWDM SFP Transceiver is a high-performance optical module designed for long-range data transmission over single-mode fiber (SMF) up to 80 kilometers. Encased in a hot-pluggable SFP form factor, it features a DWDM DFB laser transmitter and APD photodiode receiver for reliable and efficient performance. This transceiver supports data rates of up to 1.25Gbps, making it ideal for DWDM networks, SONET/SDH systems, Gigabit Ethernet, and Fiber Channel applications. It complies with SFP MSA and SFF-8472 standards, ensuring broad compatibility across networking equipment.
The module operates on a single +3.3V power supply and features a metal enclosure to minimize electromagnetic interference (EMI). It supports wavelengths on a 100GHz ITU Grid in the C Band, with wavelength precision maintained within ±0.1nm across varying life and temperature conditions. Digital diagnostic monitoring is included, providing real-time insights into parameters like transceiver temperature, laser bias current, optical power, and voltage levels. The transceiver’s operating temperature range of 0°C to +70°C ensures it performs reliably in commercial networking environments.
Optical performance is a key feature of this transceiver. It provides an average output power range of 0dBm to +4dBm and an extinction ratio of 8.2dB. The receiver offers high sensitivity, with a minimum input power of -26dBm and an overload threshold of -10dBm. It operates across an input wavelength range of 1270nm to 1610nm. The inclusion of Loss of Signal (LOS) functionality enables enhanced monitoring of link status, providing diagnostic insights for operational stability.
Electrically, the transceiver offers a differential input impedance of 100Ω and complies with IEEE 802.3z standards for transmitter output. It supports a 2-wire serial interface for accessing identification and diagnostic information. Advanced features like Transmit Disable and Transmit Fault provide enhanced control, allowing the host system to manage the module effectively.
In summary, the 1.25Gbps DWDM SFP Transceiver is a reliable and cost-effective solution for high-performance, long-distance optical communication. Its advanced optical and electrical capabilities, coupled with compliance to industry standards, make it a preferred choice for modern telecommunications and data networking infrastructures.
This DWDM SFP module supports 1.25 Gbps data rate transmission over 80 km of 9/125 µm single-mode fiber using a duplex LC connector. Operating on a single 3.3 V supply, it complies with SFP MSA and SFF-8472 standards, featuring real-time digital diagnostics for monitoring temperature, voltage, TX bias, TX power, and RX power. The unit ensures wavelength precision within ±0.1 nm on the 100 GHz ITU C-band grid. The case operating temperature range is 0 °C to +70 °C.
Optical & Link Performance
| Parameter | Value | Notes |
|---|---|---|
| Data rate | 1.25 Gbps (TX/RX) | Serial NRZ |
| Transmission distance | 80 km | 9/125 µm SMF |
| Wavelength | ITU-grid, C-band, 100 GHz spacing | ±0.1 nm stability |
| TX laser | DWDM DFB | — |
| TX output power | 0 to +4 dBm | — |
| Extinction ratio | ≥8.2 dB | — |
| SMSR | ≥30 dB | — |
| Spectral width | ≤0.3 nm (-20 dB) | — |
| RX type | APD | — |
| RX sensitivity | ≤-26 dBm | BER ≤1×10⁻¹², 1550 nm, ER = 9 dB, PRBS 2²³-1 |
| RX overload | -10 dBm | — |
| LOS assert/de-assert | -27 dBm / -38 dBm; hysteresis 0.5–6 dB | Logic 0 = normal |
| Eye mask | IEEE 802.3z compliant | — |
Electrical & Environmental
| Parameter | Value | Notes |
|---|---|---|
| Supply voltage | 3.13–3.47 V (nom. 3.3 V) | — |
| Total module current | 300 mA (TX+RX) | Excludes termination |
| Power supply noise | ≤100 mVp-p (100 Hz–1 MHz) | — |
| Case temperature | 0 °C to +70 °C | Operating |
| Connector | Duplex LC | — |
| Form factor | Hot-pluggable SFP, metal housing | Lower EMI |
| Diagnostics | SFF-8472 DDM (Temp, Vcc, TxBias, TxPower, RxPower) | I²C access A0h/A2h |
| Control/Status | Tx Disable, Tx Fault, LOS | — |
Compliance
- SFP MSA, SFF-8472 digital diagnostics.
- Class 1 laser (FDA 21 CFR 1040.10/1040.11; IEC/EN 60825-1/-2).
- EMI/ESD: FCC Part 15 Class B, EN 55022 Class B, IEC/EN 61000-4-2.
- Safety/EMC/RoHS: IEC/EN 60950 (UL), EN 61000-3, 2002/95/EC.
