CMOS-compatible integrated optical delay line for broadband K<inf>u</inf>-band satellite communications

Abstract

We present the first demonstration of a broadband and continuously tunable integrated optical true-time-delay line, operating over the complete DVB-S satellite communication band, realized with a CMOS-compatible TriPleX TM waveguide technology. The integrated optical chip includes a delay line and an optical sideband filter (OSBF) based on reconfigurable optical ring resonators (ORR). The filter and the delay responses are software programmable and have been configured for K u -band operation. For the first time, the continuous tunability between 0 and 277 ps is demonstrated over the complete for DVB-S satellite communication band (10.7-12.75 GHz).

Integrated Photonic ${\rm K}_{\rm u}$-Band Beamformer Chip With Continuous Amplitude and Delay Control

“…In line with this approach, in [7] we have proposed an integrated, continuously tunable beamformer realized with a CMOS compatible process [8] which demonstrated operation over approx. 1 GHz in L-band (1-2 GHz) [7], while in [9] we proposed a single integrated K u -band TTD line.…”

“…In this letter, for the first time, we demonstrate the performance of a complete microwave photonic integrated beamformer (IOBFN) which has been obtained by combining multiple of the individual TTD lines proposed in [9] to form a binary-tree beamformer, with continuously tunable amplitude and group delay responses. Compared to our previous demonstration in [7], the proposed IOBFN now brings together all the desired TTD characteristics, being capable of operating directly at high RF frequencies (K u -band), without need of prior downconversion, continuously and seamlessly tunable, integrated in a chip realized with a CMOS-compatible process, thus very compact and potentially very low-cost for large production volumes.…”

DDS-PLL Phase Shifter Architectures for Phased Arrays: Theory and Techniques

“…shifts exploiting propagation delay mismatches arising in electrical [2], [3], microelectromechanical [4], [5] or optical [6], [7] circuits. With this approach, the signal is routed through paths characterized by different electrical lengths.…”

A modulator-less beam steering transmitter based on a revised DDS-PLL phase shifter architecture

“…In [6], Jiang et al propose a microwave photonic phase shifter, based on an optical phase modulator and a fiber Bragg grating, capable of providing continuous phase shifts from 20-to 30-GHz. In [7], Burla et al propose a CMOS-compatible optical delay line for Ku-band satellite communications, based on four optical ring resonators.…”