Highly sensitive squaring circuit for coherent optical communications

A squaring circuit with wide dynamic range and very high sensitivity is presented. The circuit is based on a commercial Gilbert-cell multiplier manufactured in submicron self-aligned bipolar silicon technology. In a 155-Mb/s frequency-shift keying (FSK) experiment, a dynamic range of more than 25 dB...

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Bibliographic Details
Published in:IEEE photonics technology letters 1990-09, Vol.2 (9), p.680-682, Article 680
Main Authors: Bodtker, E., Welter, R., Sessa, W.B., Wagner, R.E.
Format: Article
Language:English
Subjects:
Circuits
Diodes
Dynamic range
Manufacturing
Mixers
Optical fiber communication
Optical receivers
Optical sensors
Optical signal processing
Radio frequency
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Summary:A squaring circuit with wide dynamic range and very high sensitivity is presented. The circuit is based on a commercial Gilbert-cell multiplier manufactured in submicron self-aligned bipolar silicon technology. In a 155-Mb/s frequency-shift keying (FSK) experiment, a dynamic range of more than 25 dB was obtained, and error rates well below 10/sup -9/ were demonstrated with an electrical input power of -45 dBm to the squaring circuit.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.59349