title: Vertically integrated As2S3 ring resonator on LiNbO3.
abstract: Titanium-diffused lithium niobate (Ti:LiNbO(3)) waveguides are widely used in current fiber optic networks because of their high-speed, electro-optic modulation, and low-loss integration with standard single-mode fibers. However, they cannot achieve small ring resonators owing to their lack of a high core-to-cladding index contrast. To overcome this challenge, we vertically integrate an emerging chalcogenide glass waveguide technology on well-established Ti:LiNbO(3) waveguides. We present, to our knowledge, the first arsenic trisulfide (As(2)S(3)) race-track ring resonator with a 290.8 microm bend radius in an all-pass filter configuration, integrated on a Ti:LiNbO(3) waveguide. Vertical coupling is achieved using a unique taper design. Experimental results are shown for 10.6% coupling, 2.08 dB roundtrip loss, and a 25.4 GHz free-spectral range.
authors.affiliation: Department of Electrical and Computer Engineering, Solid-State Electronics, Photonics and Nano-EngineeringLaboratory, Texas A&M University, College Station, Texas 77843-3128, USA.
authors.forename: Mehmet E
authors.initials: ME
authors.lastname: Solmaz
authors.forename: Donald B
authors.initials: DB
authors.lastname: Adams
authors.forename: Wee C
authors.initials: WC
authors.lastname: Tan
authors.forename: William T
authors.initials: WT
authors.lastname: Snider
authors.forename: Christi K
authors.initials: CK
authors.lastname: Madsen