D(Q)PSK Demodulators & Interleavers

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Optical DPSK Demodulator

Using delay line interferometry (DLI), the Optoplex DPSK demodulator converts phase modulation to amplitude modulation over the C & L bands for data rates of 2.5, 10 or 40Gbps.

• Athermal design
• Low temperature dependent frequency shift (TDFS)
• Low polarisation dependent frequency shift (PDFS)
• Low insertion & polarisation dependent loss (PDL)
• Passive (locked to ITU grid) or tunable
• Telcordia GR-1221 qualified

Optical DQPSK Demodulator

Converts differential quaternary phase modulation (DQPSK) to amplitude modulation over the C & L bands for data rates of 2.5, 10 or 40Gbps. Doubles the data rate for a given transmission rate.

• Athermal design
• Low temperature dependent frequency shift (TDFS)
• Low polarisation dependent frequency shift (PDFS)
• Low insertion & polarisation dependent loss (PDL)
• Fully and semi-tunable versions (independent I & Q arms)
• Telcordia GR-1221 qualified

90° Optical Hybrid

For coherent signal demodulation for either homodyne or heterodyne detection, the broadband device takes the signal and a local oscillator and generates four output signals, S+L, S-L, S+jL, S-jL

QPSK Mixer

Polarisation diversified optical hybrid mixes a signal with a local oscillator using a passive compact free space bulk optics module.

Optical Interleaver

A step-phase interferometer design can be used as a multiplexer or a demultiplexer to combine or separate odd and even channels with 100-200, 50-100 or 25-50GHz spacings.

Asymmetric Optical Interleaver

Allowing different passband widths for the odd and even channels the Asymmetric Optical Interleaver provides all the features of the Standard Interleaver with additional flexibility.