Abstract
A 4-bit polymer optoelectronic true-time delay (TTD) device is demonstrated. The planar lightwave circuit
(PLC) is composed of monolithically integrated low-loss passive polymer waveguide delay lines and five cascaded 2
x 2 polymer thermooptic switches. Waveguide junction
offsets and air trenches simultaneously reduce the bending loss and device area. Simulations are used to optimize
the trench and offset structures for fabrication. The 16 time delays generated by the device are measured to be in
the range from 0 to 177 ps in 11.8-ps increments. The packaged PLC has an insertion loss of up to 14.9 dB, and the
delay switching speed is 2 ms. An eight-element X-band phased-array antenna system is constructed to demonstrate the
beam-steering capabilities of the 4-bit-delay devices. The TTD devices are shown to steer the far-field radiation
pattern between 0° and -14.5°.
© 2007 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription