A Tunable Si3N4 Integrated True Time Delay Circuit for Optically-Controlled K-Band Radio Beamformer in Satellite Communication

Abstract

DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:

Cascaded Mach–Zehnder Architectures for Photonic Integrated Delay Lines

“…This figure could be easily reduced by a factor of three avoiding the use of the spiral. As a comparison, a race-track ring resonator realized with the same waveguide and used out of resonance would require a footprint of about 5 × 0.5 mm 2 [16]. The spectral characterization was performed in the optical domain using an Optical Vector Analyser that allows to characterize both power and group delay spectra.…”

A Seven Bit Silicon Optical True Time Delay Line for Ka-Band Phased Array Antenna

“…Besides, MRRs are resonance components whose spectra responses are sensitive to the fabrication variations and thermal variations. Those variations will lead to severe disturbances of the delay and result in the low tuning accuracy of the delay times [22]- [25].…”

Wideband Integrated Optical Delay Line Based on a Continuously Tunable Mach–Zehnder Interferometer

“…Photonic integration technologies are particularly advantageous for the realization of (tunable) optical delay lines since allow to reduce costs and sizes of the devices [8] and ease the integration with other optical functions such as filtering [9], modulation and light generation. Many different schemes have been proposed for the realization of integrated optical delay lines, relying on different types of optical filters [10], [11].…”

“…Because of the use of a single tunable coupler, the amplitude of the light travelling through this device necessarily depends on the applied delay, also in the ideal lossless case [21]. Ring resonators operated far from resonance wavelengths could be included in the class of non-resonant structures [9].…”