Development of 1×16 Thermo-optic MZI Switch Using Multimode Interference Coupler

다중모드 간섭현상을 이용한 1×16 마하젠더 스위치 개발

  • Kim, Sung-Won (Communications Research Lab,, Division of Electrical and Computer Engineering, Hanyang University) ;
  • Hong, Jong-Kyun (Communications Research Lab,, Division of Electrical and Computer Engineering, Hanyang University) ;
  • Lee, Sang-Sun (Communications Research Lab,, Division of Electrical and Computer Engineering, Hanyang University)
  • 김성원 (한양대학교 전자전기 컴퓨터공학부 통신연구실) ;
  • 홍종균 (한양대학교 전자전기 컴퓨터공학부 통신연구실) ;
  • 이상선 (한양대학교 전자전기 컴퓨터공학부 통신연구실)
  • Published : 2006.10.25


A $1{\times}16$ thermo-optic switch with small excess loss using multimode interference(MMI) couplers is designed, fabricated, and measured. This paper introduces the proposed $1{\times}16$ thermo-optic switch, and discusses the measurement results. The $1{\times}16$ thermo-optic switch is farmed as 4-stage which consists of 15 unit devices. The unit devices are the $2{\times}2$ thermo-optic switches with Mach-Zehnder interferometer(MZI) structure. The characteristics of the $1{\times}16$ thermo-optic switch depends strongly on each unit device. The unit deviceconsists of two 3-dB general interference MMI couplers and two single mode waveguide arms as a phase shifter. First of all, the 3-dB optical splitter and $2{\times}2$ MZI thermo-optic switch have been tested to confirm the characteristics of the unit devices of the $1{\times}16$ MZI thermo-optic switch. Using the measurement results of the unit devices, the $1{\times}16$ MZI thermo-optic switch can be produced with better characteristics. The resultant structure of the MMI coupler with the optical light source of wavelength of 1550nm for the $1{\times}16$ thermo-optic switch is that the width and the optimized length are $25{\mu}m\;and\;1580{\mu}m$, respectively. The smallest excess loss fur the unit device is -0.5dB and the average excess loss is -0.7dB.


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