S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
Stacked Polymeric Multimode Waveguide Arrays for Two-Dimensional Optical Interconnects
- Kim, Joon-Sung; Kim, Jang-Joo
- Issue Date
- J. Lightw. Technol., vol. 22, no. 3 pp. 840-844, Mar. 2004
- micro-optics; mirrors; optical arrays; optical crosstalk; optical fabrication; optical interconnections; optical losses; optical polymers; optical waveguides; surface emitting lasers; ultraviolet lithography; Contact printing lithography; double-reflection mirror; stacked polymeric waveguide arrays; two-dimensional(2-2-D) optical interconnects
- Two-dimensional (2-D) polymeric multimode waveguide arrays with two reflection-mirrors have been fabricated for optical interconnects between 2-D arrayed vertical-cavity surface-emitting lasers and detectors. Contact printing lithography was adopted for simple and low-cost process using ultraviolet-curable epoxy-based polymers. Fabricated waveguides were diced of the same size and stacked one by one with lateral positional errors less than ±20 μm. Two kinds of mirrors were fabricated: single-reflection mirror and double-reflection mirror. Double-reflected mirrors resulted in lower losses with 1.2 dB than single reflected mirrors with 2.1 dB. The average insertion losses of 16-channel arrayed waveguides with two single-reflection mirrors and with two double-reflection-mirrors were measured to be 6.1 and 4.4 dB for 6-cm-long waveguides at a wavelength of 830 nm, respectively. The crosstalk between the waveguides was less than -25 dB. The characteristics of the waveguide arrays are good enough for applications to optical interconnects.