Ligent intros GPON transceiver

SEPTEMBER 17, 2007 — Ligent Photonics Incorporated debuted its LTB3467 optical network terminal (ONT/ONU) GPON transceiver for 2488.32-Mbit/sec. downstream and 1244.16-Mbit/sec. upstream bidirectional data links. It targets FSAN/ITU-T G.984.2 Class B+ service, offering reportedly wide dynamic range, fast response time, and low noise.

SEPTEMBER 17, 2007 — Ligent Photonics Incorporated (St. Charles, IL) debuted its LTB3467 optical network terminal (ONT/ONU) GPON transceiver for 2488.32-Mbit/sec. downstream and 1244.16-Mbit/sec. upstream bidirectional data links. It targets FSAN/ITU-T G.984.2 Class B+ service, offering reportedly wide dynamic range, fast response time, and low noise.

The device operates in the 1310- and 1490-nm bands and incorporates an APD/TIA receiver and distributed feedback (DFB) laser transmitter. A die-cast electromagnetic and radio-frequency interference (EMI/RFI) shield and cage assembly, in industry-standard 2 × 10 SFF fiber pigtail package with SC/APC connector, provides reliability and ruggedized packaging.

The SFF 8472 Revision 9.3 digital diagnostic monitor tracks transceiver operating parameters in real time, checking module temperature, transmitter average burst mode power output, laser burst mode bias current, module voltage, and receiver input/RSSI. The device incorporates a power-level control feature, accessed with a I2C data interface, which permits the optical power to be adjusted in 3-dB steps over a 6-dB dynamic range.

The LTB3467 transceiver incorporates -30-dBm typical receiver sensitivity and +2.5-dBm minimum optical output power for a solid link budget. Operating range is -40° to +85°C.

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