The full text of this item is not available at this time because the student has placed this item under an embargo for a period of time. The Libraries are not authorized to provide a copy of this work during the embargo period, even for Texas A&M users with NetID.
Novel Birefringent Frequency Discriminator for Microwave Photonic Links
Abstract
A novel photonic frequency discriminator has been developed. The discriminator utilizes a Mach Zehnder interferometer-assisted ring resonator to achieve enhanced linearity. A numerical frequency-domain two-tone test is performed to evaluate the unique design of the discriminator, particularly for suppression of the third order intermodulation distortion. The discriminator is switchable between linear-intensity and linear-field regimes by adjusting a phase delay on one arm of the Mach Zehnder interferometer. Through the simulation, the linear<intensity discriminator is shown to be advantageous.
The discriminator is an optical ring resonator-Mach Zehnder interferometer synthesized passive filter. The ring resonator is made of Arsenic trisulfide (As2S3) and the bus waveguide is a Titanium<diffused Lithium niobate (LiNbO3) waveguide. This As2S3 ring-on-Ti:LiNbO3 hybrid structure offers electro-optic tunability of the device owing to a strong electro-optic effect of the substrate material. A large optical confinement factor achieved by vertical integration of the As2S3 strip waveguide on a LiNbO3 substrate enables a low loss ring resonator. The Mach Zehnder interferometer is formed by the optical path length difference of the birefringent LiNbO3 substrate instead of a physical Y-branch structure, which makes the fabrication tolerances relaxed.
In order for this highly birefringent device to be characterized, each polarization mode must be measured separately. A novel algorithm which can measure the wavelength-swept Jones matrix including its phase response is devised. The efficacy of the algorithm is demonstrated by characterizing a ring resonator. Finally, the fabricated discriminator is fully characterized using the algorithm.
Subject
Micriwave Photonicsfrequency discriminator
RF-photonics
optical waveguide
planar lightwave circuit
optical telecommunication
analog optical link
optical ring resonator
lithium niobate
chalcogenide photonics
optical filter
Citation
Kim, Jae Hyun (2013). Novel Birefringent Frequency Discriminator for Microwave Photonic Links. Doctoral dissertation, Texas A&M University. Available electronically from https : / /hdl .handle .net /1969 .1 /149441.
Related items
Showing items related by title, author, creator and subject.
-
Zhang, Huiliang (2012-02-14)Optical imaging of soft biological tissue is highly desirable since it is nonionizing and provides sensitive contrast information which enables the detection of physiological functions and abnormalities, including potentially ...
-
Shafer, Christina (2006-08-16)Histology, though widely used for cellular imaging, suffers from its destructive nature; cells are not viewed in their natural living environment. Nonlinear optical microscopy (NLOM) has been widely used to view cells in ...
-
Rossi, Daniel Peyton (2018-06-19)The study of semiconductor nanocrystals and quantum dots with controlled size and shape offers a unique platform to study the effects of morphological and structural asymmetries, as well as quantum confinement on the optical ...