A simple integrated ratiometric wavelength monitor based on multimode interference structure

Agus Muhamad Hatta, Gerald Farrell, Qian Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)


Wavelength measurement or monitoring can be implemented using a ratiometric power measurement technique. A ratiometric wavelength monitor normally consists of a Y-branch splitter with two arms: an edge filter arm with a well defined spectral response and a reference arm or alternatively, two edge filters arms with opposite slope spectral responses. In this paper, a simple configuration for an integrated ratiometric wavelength monitor based on a single multimode interference structure is proposed. By optimizing the length of the MMI and the two output port positions, opposite spectral responses for the two output ports can be achieved. The designed structure demonstrates a spectral response suitable for wavelength measurement with potentially a 10 pm resolution over a 100 nm wavelength range.

Original languageEnglish
Title of host publicationOptical Design and Engineering III
Publication statusPublished - 2008
Externally publishedYes
EventOptical Design and Engineering III - Glasgow, United Kingdom
Duration: 2 Sept 20085 Sept 2008

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceOptical Design and Engineering III
Country/TerritoryUnited Kingdom


  • Integrated optics
  • Multimode interference
  • Wavelength monitor


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