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Proceedings Paper

Tunable arrayed waveguide grating driven by surface acoustic waves
Author(s): Antonio Crespo-Poveda; Alberto Hernández-Mínguez; Klaus Biermann; Abbes Tahraoui; Bernardo Gargallo; Pascual Muñoz; Paulo V. Santos; Andrés Cantarero; Maurício M. de Lima
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Paper Abstract

We present a design approach for compact reconfigurable phased-array wavelength-division multiplexing (WDM) devices with N access waveguides (WGs) based on multimode interference (MMI) couplers. The proposed devices comprise two MMI couplers which are employed as power splitters and combiners, respectively, linked by an array of N single-mode WGs. First, passive devices are explored. Taking advantage of the transfer phases between the access ports of the MMI couplers, we derive very simple phase relations between the arms that provide wavelength dispersion at the output plane of the devices. When the effective refractive index of the WGs is modulated with the proper relative optical phase difference, each wavelength component can switch paths between the preset output channel and the remaining output WGs. Moreover, very simple phase relations between the modulated WGs that enable the reconfiguration of the output channel distribution when the appropriated coupling lengths of the MMI couplers are chosen are also derived. In this way, a very compact expression to calculate the channel assignment of the devices as a function of the applied phase shift is derived for the general case of N access WGs. Finally, the experimental results corresponding to an acoustically driven phased-array WDM device with five access WGs fabricated on (Al,Ga)As are shown.

Paper Details

Date Published: 15 March 2016
PDF: 18 pages
Proc. SPIE 9751, Smart Photonic and Optoelectronic Integrated Circuits XVIII, 97510Y (15 March 2016); doi: 10.1117/12.2208868
Show Author Affiliations
Antonio Crespo-Poveda, Univ. of Valencia (Spain)
Alberto Hernández-Mínguez, Paul Drude Institute for Solid State Electronics (Germany)
Klaus Biermann, Paul Drude Institute for Solid State Electronics (Germany)
Abbes Tahraoui, Paul Drude Institute for Solid State Electronics (Germany)
Bernardo Gargallo, Polytechnic Univ. of Valencia (Spain)
Pascual Muñoz, Polytechnic Univ. of Valencia (Spain)
Paulo V. Santos, Paul Drude Institute for Solid State Electronics (Germany)
Andrés Cantarero, Univ. of Valencia (Spain)
Maurício M. de Lima, Univ. of Valencia (Spain)


Published in SPIE Proceedings Vol. 9751:
Smart Photonic and Optoelectronic Integrated Circuits XVIII
Sailing He; El-Hang Lee; Louay A. Eldada, Editor(s)

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