Using Bessel beams to induce programmable volume integrated optical circuitry

Feifei Xin, Mariano Flammini, Fabrizio Di Mei, Ludovica Falsi, Davide Pierangeli, Aharon J. Agranat, Eugenio DelRe

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Programmable waveguides scalable into highly integrated photonic circuits are key ingredients to the development of innovative optical technology in various rapidly growing fields, including linear quantum computation and optical information processing [1-3]. At present, no scalable optical writing technique based solely on linear waves has been demonstrated in a full macroscopic volume and circuit fabrication involves a step-by-step printing that becomes increasingly cumbersome as design complexity grows. We demonstrate a scalable method to optically induce waveguides deep in a volume using Bessel beams [4]. The method is used to fabricate waveguides in increasingly complex geometries, integrated multi-port splitters and miniaturized functional electro-optic gates. Our experiments are performed in paraelectric potassium-lithium-tantalate-niobate (KLTN) where writing occurs through photogenerated space-charge while guiding and electro-optic functionality are supported by the quadratic electro-optic effect. In Fig. 1 we demonstrate the use of Bessel Beam (BB) waveguide writing to achieve 1×2, 1×3, and 1×4 splitters launching multiple angled BBs during the fabrication stage. The BBs are rendered mutually incoherent using a specific SLM time sequenced mask that turns on one BB at a time. This demonstrates how fabrication of complex circuitry can also be achieved in a single illumination stage without having to mechanically shift and move the sample, as instead is required in direct writing scanning techniques.

Original languageAmerican English
Title of host publicationThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
PublisherOptica Publishing Group (formerly OSA)
ISBN (Print)9781728104690
StatePublished - 2019
EventThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019 - Munich, Germany
Duration: 23 Jun 201927 Jun 2019

Publication series

NameOptics InfoBase Conference Papers
VolumePart F140-CLEO_Europe 2019
ISSN (Electronic)2162-2701


ConferenceThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019

Bibliographical note

Publisher Copyright:
© 2019 IEEE


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