Oclaro Technology Limited

Lumentum Technology UK Limited

Stephen Gardner

Andrew Cannon Carter

Adrian Perrin Janssen

Barrie Flintham

Methods and apparatus for use in coherent transmission and reception of optical data signals. An integrated optics block () for use in a coherent optical transmitter comprising: a beam splitter () configured to split an input light signal into first and second input light signals, to output the first input light signal for use in an optical transmitter chip and to output the second input light signal for use as a local oscillator signal; a polarization combiner () configured to combine first and second received modulated light signals to form an output; and a polarization rotator () configured to rotate the polarization of the second modulated light signal such that it is substantially orthogonal to the polarization of the first modulated light signal prior to combining.

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Devon, United Kingdom

Stephen Gardner