Micro-racetrack notch filters based on InGaAsP/InP high mesa optical waveguides

Woo Seok Choi, Weifeng Zhao, Jeong Woon Bae, Ilesanmi Adesida, Bong Ahn Yu, Yeung Lak Lee, Jae Hyung Jang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Experimental and theoretical investigations were carried out on the spectral responses of micro-racetrack notch filters based on InP/InGaAsP high mesa optical waveguides that were fabricated by utilizing electron beam lithography and inductively-coupled-plasma reactive ion etching (ICP-RIE) technique. The critical factors determining the performance of micro-racetrack resonator-coupled devices were identified to be the optical power coupling efficiency between the bus waveguide and the racetrack resonator and the round-trip loss of the racetrack resonator. These parameters were extracted from the measured spectral responses of three single resonator-coupled waveguide devices with different gap spacings between the bus waveguides and the racetrack resonators, which were 0.2, 0.35, and 0.5 μm. These extracted parameters can be used to uniquely determine the pole and zero locations of the unit racetrack-coupled waveguide filter. The phase responses as well as the magnitude responses of optical filters can be calculated using the uniquely determined pole and zeros. The extracted parameters were used to calculate the spectral responses of a high-order racetrack-coupled device that was designed by cascading the three single racetrack-coupled devices having gap spacings of 0.2, 0.35, and 0.5 μm. The calculated and measured spectral responses of the high-order filters were compared to verify the parameter extraction process. The measured spectral response of the filters matched very well with the theoretically calculated response using the extracted parameters from the first-order racetrack resonator-coupled devices.

Original languageEnglish
Pages (from-to)2434-2439
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
Volume46
Issue number4 B
DOIs
Publication statusPublished - Apr 24 2007
Externally publishedYes

Fingerprint

Notch filters
mesas
Optical waveguides
notches
optical waveguides
Resonators
filters
spectral sensitivity
resonators
Poles and zeros
Waveguides
Waveguide filters
waveguides
Parameter extraction
Optical filters
Plasma etching
Electron beam lithography
Matched filters
Reactive ion etching
Inductively coupled plasma

Keywords

  • Integrated optics
  • Micro-resonator
  • Optical filter
  • Semiconductor optical waveguide
  • Wavelength-division multiplexing (WDM)

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Micro-racetrack notch filters based on InGaAsP/InP high mesa optical waveguides. / Choi, Woo Seok; Zhao, Weifeng; Bae, Jeong Woon; Adesida, Ilesanmi; Yu, Bong Ahn; Lee, Yeung Lak; Jang, Jae Hyung.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes, Vol. 46, No. 4 B, 24.04.2007, p. 2434-2439.

Research output: Contribution to journalArticle

Choi, Woo Seok ; Zhao, Weifeng ; Bae, Jeong Woon ; Adesida, Ilesanmi ; Yu, Bong Ahn ; Lee, Yeung Lak ; Jang, Jae Hyung. / Micro-racetrack notch filters based on InGaAsP/InP high mesa optical waveguides. In: Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes. 2007 ; Vol. 46, No. 4 B. pp. 2434-2439.
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