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In-phase and quadrature detection using 90° optical hybrid receiver: experiments and design considerations

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4 Author(s)
Hodgkinson, T.G. ; British Telecom Res. Labs., Ipswich, UK ; Harmon, R.A. ; Smith, D.W. ; Chidgey, P.J.

140 Mbit/s ASK and DPSK optical hybrid receiver performance measurements are reported and discussed. The sensitivity of this type of receiver to polarisation misalignment is compared with that of a standard coherent (homodyne/heterodyne) receiver. The effects of laser phase noise and offsetting of the intermediate frequency from zero hertz are discussed along with other potential applications for 90° optical hybrid in-phase and quadrature receivers

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Optoelectronics, IEE Proceedings J  (Volume:135 ,  Issue: 3 )