Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 22, Issue 21, Pages 1565-1567Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2010.2069558
Keywords
Arrayed wavegide grating (AWG); optical true time delay (TTD); perfluoropolymers; waveguides
Funding
- Defense Advanced Research Projects Agency (DARPA) [W31P4Q-05-C-R021]
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A high-performance 4-bit optical true time delay device is realized on a perfluoropolymer integrated optic platform. The integrated waveguide circuit is based on athermal arrayed wavegide grating with monolithically integrated delay lines in a wavelength-selective recirculating loop configuration. The device provides precise delay length control (i.e., 1 mu m) over 16 channels with 40-ps incremental time delays. The device offers athermal operation over the 0 degrees C-50 degrees C range with a maximum insertion loss of 6.8 dB and a polarization shift of 0.4 nm. This compact device (20 x 32 x 3 mm(3)) promises applications in code-division multiple access and phased arrayed antenna systems, where the large channel counts with high resolution delay length controls and small footprints are required.
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