@article { Burla:14, title = {On-chip programmable ultra-wideband microwave photonic phase shifter and true time delay unit}, journal = {Optics Letters}, volume = {39}, number = {21}, year = {2014}, month = {11/2014}, pages = {6181--6184}, publisher = {OSA}, type = {article}, abstract = {We proposed and experimentally demonstrated an ultra-broadband on-chip microwave photonic processor that can operate both as RF phase shifter (PS) and true-time-delay (TTD) line, with continuous tuning. The processor is based on a silicon dual-phase-shifted waveguide Bragg grating (DPS-WBG) realized with a CMOS compatible process. We experimentally demonstrated the generation of delay up to 19.4\&\#xA0;ps over 10\&\#xA0;GHz instantaneous bandwidth and a phase shift of approximately 160\&\#xB0; over the bandwidth 22\&\#x2013;29\&\#xA0;GHz. The available RF measurement setup ultimately limits the phase shifting demonstration as the device is capable of providing up to 300\&\#xB0; phase shift for RF frequencies over a record bandwidth approaching 1\&\#xA0;THz.}, keywords = {Phase shift; Continuous optical signal processing ; Integrated optics devices; Bragg reflectors; Microwaves}, URL = {http://ol.osa.org/abstract.cfm?URI=ol-39-21-6181}, author = { Burla, Maurizio and Cortes, Luis Romero and Li, Ming and Wang, Xu and Chrostowski, Lukas and Jose Azana } }