Bookham Technology is now sampling an optical receiver with overload protection that meets the GR-253-CORE and G.959.1 ITU and IEEE standards.
The ATV10GC receiver itself consists of an Avalanche Photodiode, a low-noise preamplifier, a Micro-Electro-Mechanical System (MEMS) Variable Optical Attenuator (VOA) that controls the optical power reaching the Avalanche Photodiode, and a precision Negative Temperature Co-efficient (NTC) thermistor in a hermetic coplanar package with a single-mode fibre pigtail. Differential outputs are provided to improve noise rejection for enhanced sensitivity.
The receiver is optimised for use in 10Gbit/sec Dense Wavelength Division Multiplexing (DWDM) metro or regional metro applications, either as a discrete device or within a transponder. It has been designed to withstand +10dBm overload, a +5dBm margin over the ITU requirement.
The product is now available in sample quantities, with high volume shipments beginning in January 2005.
Telcordia GR-468-CORE qualification is underway, and the MEMS die, APD die and Transimpedance amplifier die are already fully qualified.