Coherent mixers enable ultra high-rate optical transmission by revealing additional information about the amplitude and phase of the received optical signal over traditional intensity-level receivers, allowing transmission of multiple bits in each optical data pulse.

Specifically, the coherent mixer product provides advanced demodulation to analyze the state-of-polarization and optical phase of a phase-modulated signal relative to an externally supplied optical reference, enabling recovery of the phase-polarization constellation for dual polarization quadrature phase shift keyed (DP-QPSK) data transmission.

At the same time, NeoPhotonics announced the initial availability of its demodulator for differential quadrature phase shift key (DQPSK) data transmission. NeoPhotonics’ DQPSK demodulator consists of two PIC integrated delay line interferometers (DLIs), providing in-phase and quadrature analysis of differentially phase-encoded signals. To accommodate the unpredictable and varying nature of the received signal polarization, NeoPhotonics’ DQPSK demodulator has been optimized such that the performance exhibits extremely low sensitivity to polarization variations.

“Our photonic integrated circuit design and fabrication capabilities have enabled us to achieve both the high optical performance required for these products and to ramp production volumes in record time. Only photonic integrated circuits provide the high performance, compact size, temperature range and volume production capability required for these next generation products,” said Wupen Yuen, vice president of engineering for NeoPhotonics.

NeoPhotonics is exhibiting at ECOC (stand 613 in the Austria Centre, from September 21 to September 23, 2009) the new products described above as well as the complete portfolio of MEMS and PIC based optical components and broad line of telecom transceiver products in SFF, SFP and XFP form factors.

In addition, Tony Ticknor, director of R&D at NeoPhotonics, will provide a presentation on PLC-based hybrid integration devices in the Workshop entitled monolithic and hybrid photonic integrated transceivers for advanced modulation formats at ECOC on September 20, 2009 at 2:30 pm.

NeoPhotonics is a US-based developer and vertically integrated manufacturer of PIC based components, modules and subsystems.