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Optical subassembly modules come in JEDEC TO cans

Posted: 27 Mar 2003 ?? ?Print Version ?Bookmark and Share

Keywords:Mitsubishi electric? 10gbe transmitter? 10gbe receiver? tosa? rosa?

Mitsubishi Electric has introduced uncooled 10GbE transmitter and receiver optical subassembly (TOSA and ROSA) modules in an industry-standard, coaxial JEDEC TO can package for XENPAK, X2, and XPAK applications. When used together, the 10GbE TOSA and ROSA modules achieve a 10km transmission distance.

The modules feature newly designed electrical signal interfaces that use differential inputs (for the TOSA) and outputs (for the ROSA) to provide high electrical performance over 10GHz. Both operate over the 0C to 80C temperature range without a thermoelectric cooler, thereby reducing package size, power consumption, and cost.

Space and cost are reduced further by using a standard coaxial JEDEC TO can package, enabling the modules to have a 7mm diameter and a length of 15.3mm (TOSA) or 11.5mm (ROSA).

The TOSA module (part number: FU185SDF) incorporates a DFB laser diode that operates in the 1,260nm to 1,355nm wavelength range with an average optical power output of -2dBm and a power consumption of 100mW. The module's 50-ohm differential input impedance eliminates common noise for high data-rate transmissions.

In addition to the DFB laser diode, the TOSA module also contains a miniaturized optical isolator, bias circuits, and a single-mode optical fiber stub (SC ferrule).

The ROSA module (part number: FU135SPP) contains a PIN photodiode with a low-noise transimpedance preamplifier. It exhibits a typical sensitivity of -16dBm in optical modulation amplitude, enabling it to detect optical signals transmitted up to 10km. The ROSA module also demonstrates a responsivity of 0.85A/W.

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