Sangyup Song

High-Speed Optical Interconnect Coupler Based on Soft Lithography Ribbons

In this paper, high-speed optical ribbon couplers for card-to-backplane interconnect applications are presented. The ribbon couplers are based on evanescent coupling between flexible multimode waveguide arrays. A soft lithographic technique is utilized to fabricate the ribbons. A flexible nonterminating optical data bus has been developed. Using BeamPROP software, we simulated the evanescent light coupling between two closely spaced ribbon waveguides to study the effects of waveguides separation, interaction length, and misalignment on coupling efficiency. Further experimental analysis and tests have been performed to quantify these effects. To investigate data transmission performance, a 12-channel optical interconnect link has been assembled. Experimental results demonstrated successful evanescent coupling; facilitating auto alignment coupling between card and backplane ribbon waveguides at data speeds as high as 10 Gb/s per channel. The evident high-speed interconnect performance and rapid ribbon prototyping approach can result in overall lower cost coupler fabrication for prospective optical interconnect applications.

Vacuum-Assisted Microfluidic Technique for Fabrication of Guided Wave Devices

We report on a novel vacuum-assisted microfluidic (VAM) technique for guided wave device fabrication. Ultraviolet curable resins were used to demonstrate the effective VAM waveguide fabrication. Comparisons to a conventional soft molding technique demonstrate that the VAM approach results in lower propagation losses, lower crosstalk, and improved waveguide structures. More importantly, microscope analysis portrays improved device formation, sidewall edges, and the elimination of the polymer background residue inherent to traditional soft molding fabrication techniques. As a low-cost rapid prototyping technique, the VAM soft lithographic method allows guided wave devices to be implemented rapidly and inexpensively.

Channel waveguide fabrication via microtransfer molding and microfluidic technique

We report on various single and multimode channel waveguide structures fabricated via microtransfer molding and microfluidic techniques. These soft lithographic fabrication techniques can result in an inexpensive and rapid turnover of various types of channel waveguide structures and general integrated optic devices. It may be particularly useful for production of waveguides on user-desired surface substrates including those of a curved or distorted nature. Microscopic cross-sectional images for both single and multimode waveguides are obtained and compared between the two fabrication methods. The novel microfluidic technique results in superior waveguide formation and improved propagation loss performance.

Novel polymeric light emitting diode having conjugation length control moiety

To control the emitting color, we designed new PPVs containing silicon and nitrogen atoms to act as the ?-conjugation interrupt units. According to the monomer feeding ratios, the emitting light revealed from blue to red.

Novel Vacuum Assisted Microfluidic Technique for Fabrication of Guided Wave Devices

A novel vacuum-assisted-microfluidic (VAM) fabrication technique is presented. The method results in lower propagation losses and improved waveguide structures. The technique is employed to develop optical interconnect ribbon couplers and a color filter for OLED.

White-light-emitting OLED display based on partially conjugated Si-PPV copolymer

Partially conjugated PPV derivatives as an emitting material were prepared in order to control the emitting color. According to the control of the conjugation length of the PPV emitters by using the conjugation interrupt atoms such as nitrogen (N-PPV) or silicon (Si-PPV) in their polymer backbone, various emitting PPV derivatives have been obtained. Highly efficient bright white emitter can be realized through simple mixing of various PPV derivatives.

Emitting Color Controllable Novel PPV Polymers

Novel PPV emitters having conjugation limited atoms in their polymer backbone have been synthesized to control their emitting color through the control of conjugation length. White light emitters have been realized. Article not available.