Abstract
A planar integrated optical device based on the interaction of two spatial
eigenmodes with a single eigenmode ring resonator is presented. Solutions
for the output mode amplitudes are determined theoretically and are shown
to be strong functions of the relative phases of the two input modes. A device
was fabricated in a polymer-silicon material system by a photolithographic
process. The modal response as a function of wavelength is measured by the
twin-fiber interferometer technique through fringe visibility. It is found
that sharp visibility lineshapes may be achieved through the adjustment of
input mode phase and twin-fiber spacing on the radiated output beam. These
sharp lineshapes are also possible in the presence of high loss in the resonator.
The on-chip test device incorporates a single mode to two-mode converter and
a far-field wavefront sampler. The measured fringe visibility slope with respect
to wavelength reaches a maximum value of 74 nm$^{- 1}$ which is 56 nm$^{-1}$ larger than a single mode waveguide
coupled to a single mode microring with the same ring loss and 15 dB extinction
ratio. Such sharp lineshapes in visibility may be exploited for optical applications
in sensing, communications, and computing.
© 2009 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