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Proceedings Paper

Design and performance of GaAs-based guided-wave heterodyne circuits for signal processing
Author(s): Vittorio M. N. Passaro; Anna Maria Matteo; Mario Nicola Armenise
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Paper Abstract

In this work are presented the design parameters and performance of a guided-wave spectrum analyzer based on a multilayered ZnO/AlxGa1-xAs/AlyGa1-yAs/GaAs structure for heterodyne detection of spread spectrum signals. The adopted circuit configuration includes a double integrated collimating grating having non linear groove profiles, an acousto-optic Bragg cell, a concave frating lens, a focusing grating lens and an output photodiode array. The optical structure has been optimized as a function of the layer thickness, and Al title in order to obtain improved performance of the circuit in terms of 3-dB Bragg bandwidth (up to 185 MHz), surface acoustic wave power consumption (less than 3 mW), frequency resolution (less than 1.5 MHz), and single-tone dynamic range (about 56 dB). The number of channels has been found equal to 112 and 125 in the two structures under investigation, respectively. The calculated single- and double-tone dynamic range are reduced of about 40% with respect to the corresponding dynamic ranges of the homodyne architecture. All the design parameters have been calculated for each integrated component of the circuit at the free-space optical wavelength of 0.85 micrometers .

Paper Details

Date Published: 17 March 1995
PDF: 7 pages
Proc. SPIE 2401, Functional Photonic Integrated Circuits, (17 March 1995); doi: 10.1117/12.205045
Show Author Affiliations
Vittorio M. N. Passaro, Politecnico di Bari (Italy)
Anna Maria Matteo, Politecnico di Bari (Italy)
Mario Nicola Armenise, Politecnico di Bari (Italy)


Published in SPIE Proceedings Vol. 2401:
Functional Photonic Integrated Circuits
Mario Nicola Armenise; Ka-Kha Wong, Editor(s)

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