43-Gbit/sec photoreceivers accelerate optical communications

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u2t Photonics AG, a Berlin-based vendor of leading edge optoelectronic components, has introduced two differential pin-TIA photoreceivers for SONET OC-768/SDH STM-256 fibre-optic networks—the result of ongoing collaborative design and development between u2t and Inphi.

The photoreceivers incorporate Inphi's latest high-performance transimpedance amplifiers (TIAs), which operate at data rates up to 43 Gbits/sec. The partners says the products will provide equipment manufacturers with a reliable and cost-effective solution across multiple wavelengths for metro, short-reach, and long-haul transmission systems. "Once again, Inphi has played a decisive role in enabling u2t Photonics to develop and launch highly integrated receiver modules that address customer demand for bandwidth, gain, and low-power consumption," contends u2t sales and marketing vice president Michael Kneier. "Moreover, the differential output mode allows our customers to directly drive the subsequent decision circuits."

The KPRV2021 photoreceiver comprises Inphi's high-bandwidth 4334TA TIA with a limiting output buffer and u2t's waveguide-integrated pin photodiode. With an optical-to-electrical bandwidth of 40 GHz and a differential conversion gain of 300 V/W, the device is designed specifically for OC-768 applications. The KPRV2021 also has a control option to adjust DC offset between differential outputs to provide users with maximum design flexibility.

The KPRV2022 differential photoreceiver incorporates Inphi's high-gain 4331TA TIA with a limiting output buffer and u2t's waveguide- integrated pin photodiode. The module has an optical-to-electrical bandwidth of 33 GHz with a differential conversion gain of 1,000 V/W, and it is optimised for high-sensitivity nonreturn to zero applications.

"Inphi's enduring relationship with u2t Photonics," notes Inphi marketing director Gary Franzosa, "has enabled us to furnish our high-speed TIAs directly to customers designing 40-Gbit/sec systems in an easily integrated module format. Equipment manufacturers can obtain all of our OC-768 products, which include drivers, multiplexers, and demultiplexers, in both die and packaged versions."

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