Ozturk, C Huntington, A Aydinli, A Byun, YT Dagli, N 2024-01-21T10:13:30Z 2024-01-21T10:13:30Z 2021-09-01 2002-08 0733-8724 https://pubs.kist.re.kr/handle/201004/139353 This paper reports a study on a compact filter fabricated using hybrid integration of compound semiconductors and polymers. A GaAs epilayer is glued onto a polymer channel waveguide forming a highly asymmetrical directional coupler. This approach results in a narrow band filter due to very different dispersion characteristics of the compound semiconductor and the polymer materials. Furthermore, fiber coupling loss has been significantly reduced, since the input and output coupling is done through the polymer waveguide. Filtering characteristics can be engineered by changing the thickness and the length of the semiconductor epilayer. This can be done precisely using etch stop layers and noncritical lithography. The spectral response of such a filter can also be tuned electronically either using the electro-optic properties of the compound semiconductor or the thermo-optic properties of the polymer. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC COUPLER FILTER BRAGG GRATINGS FIBER DESIGN GAAS Filtering characteristics of hybrid integrated polymer and compound semiconductor waveguides Article 10.1109/JLT.2002.800783 1 JOURNAL OF LIGHTWAVE TECHNOLOGY, v.20, no.8, pp.1530 - 1536 JOURNAL OF LIGHTWAVE TECHNOLOGY 20 8 1530 1536 scie scopus 000179399500036 2-s2.0-0036705246 Engineering, Electrical & Electronic Optics Telecommunications Engineering Optics Telecommunications Article COUPLER FILTER BRAGG GRATINGS FIBER DESIGN GAAS bandstop filter hybrid integration tunable filter wavelength division multiplexing (WDM)