Laser, detector modules enable 10G transmission over FDDI-grade MMF
March 8, 2006 Anaheim, CA -- At OFC/NFOEC 2006, NEC has introduced a series of laser and detector modules aimed at engineers developing high-speed networks using installed base multimode fiber. The company says its NX7320 transmitter optical sub-assemblies (TOSA) and NR3420 receiver optical sub-assemblies (ROSA) are designed to enable such networks to provide the high speeds demanded by large volumes of data.
Available from NEC's partner California Eastern Laboratories, both devices meet the IEEE802.3aq 10GBASE-LRM standard for 10-Gbit/sec transmission over 220 m multimode optical fiber.
According to the company, the NX7320 employs a 1.3-µm Fabry-Perot AlGaInAs laser diode designed for direct modulation and uncooled operation. The AlGaInAs process uses an oxidation-free crystal growth technique to achieve extremely high reliability. The NR3420 detector employs a PIN diode with a large detecting area that enables the high coupling efficiency required by multi-mode fiber. Both allow stable, high-speed communication over a Â5° to +85°C temperature range.
The company says the NX7320 and NR3420 devices are ideal for use in industry-standard XENPAK, X2, and miniature XFP optical transceiver modules. The devices can be ordered with either LC or SC receptacles that help eliminate optical alignment problems and ensure fixed optical coupling, according to the company.
