u²t Photonics samples 100G coherent receiver

JANUARY 18, 2010 -- Optoelectronic components company u²t Photonics AG has announced the availability of its 100-Gbps coherent photoreceiver for long-haul 100-Gbps communication systems using the dual-polarization quadrature phase-shift keying (DP-QPSK) modulation format. u²t is now sampling the product for system-level testing to both subsystem and equipment manufacturers.

u²t says its new CPRV series will offer a family of very compact coherent receivers for DP-QPSK applications. The company asserts it has been “a significant contributor” to the development of the Implementation Agreement on 100G long-distance integrated photonics receivers within the Optical Internetworking Forum; thus, the receiver is based on these requirements as well as on the specifications of the CCRx–MSA for coherent receivers.

The CPRV1010A receiver is designed to offer balanced detection for best sensitivity. Used in a polarization diversity scheme it comprises two 90-degree hybrids, eight photodiodes, and four linear amplifiers (these last from Inphi Corp.) integrated into a compact surface-mount package. It provides four differential 32-GBaud output signals into the following analog-to-digital converter circuitry via a coplanar electrical interface, covering forward error correction overhead. Automatic gain control and a multitude of control functions allow for a wide dynamic range of optical input signal powers between -18 and 0 dBm, the company adds.

“One key success factor for the fast development of such complex product using new technologies was our close cooperation not only with subsystem and equipment manufacturers but also with component suppliers,” said Jens Fiedler, vice president, sales and marketing at u²t. “We had to ensure compliance to system requirements and interface specifications in order to enable successful system-level integration and immediate testing. We are really excited about the tremendous interest in this new product. The demand for the upcoming months is already exceeding the forecasted quantities.”

Prototypes of the new product platform are now available. The CPRV series is scheduled to be ready for volume production in the second half of 2010.

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