True-time-delay element in lossy environment using EO waveguides
- 19 December 2005
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 18 (1) , 10-12
- https://doi.org/10.1109/lpt.2005.860043
Abstract
We investigate a photonic true time delay element in a lossy environment using electrooptic waveguides. Its principle is based on the ring resonator and the all-pass filter. In the lossy environment, it is known that the insertion loss depends on the delay time when using the conventional ring resonator. We add a by-pass waveguide to the ring resonator in order to compensate the resonant-dependent loss. As a result, we have a voltage-controlled photonic true time delay element with its insertion loss independent of the delay time.Keywords
This publication has 7 references indexed in Scilit:
- Hybrid Analog–Digital Variable Fiber-Optic Delay LineJournal of Lightwave Technology, 2004
- Electrically tunable delay line using an optical single-side-band modulatorIEEE Photonics Technology Letters, 2002
- Ring fiber resonators based on fused-fiber grating add–drop filters: application to resonator couplingOptics Letters, 2002
- Optical delay lines based on optical filtersIEEE Journal of Quantum Electronics, 2001
- Photonic beamformer for phased array antennas using a fiber grating prismIEEE Photonics Technology Letters, 1997
- Continuously variable true time-delay optical feeder for phased-array antenna employing chirped fiber gratingIEEE Transactions on Microwave Theory and Techniques, 1997
- Synthesis of coherent two-port lattice-form optical delay-line circuitJournal of Lightwave Technology, 1995