Integrated optical systems for excitation delivery and broadband detection in micro-fluidic electrochromatography

S. A. Kemme, M. E. Warren, W. C. Sweatt, J. R. Wendt, C. G. Bailey, C. M. Matzke, A. A. Allerman, D. W. Arnold, T. R. Carter, R. E. Asbill, S. Samora

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


We have designed and assembled two generations of integrated micro-optical systems that deliver pump light and detect broadband laser-induced fluorescence in micro-fluidic chemical separation systems employing electrochromatography. The goal is to maintain the sensitivity attainable with larger, tabletop machines while decreasing package size and increasing throughput (by decreasing the required chemical volume). One type of micro-optical system uses vertical-cavity surface-emitting lasers (VCSELs) as the excitation source. Light from the VCSELs is relayed with four-level surface relief diffractive optical elements (DOEs) and delivered to the chemical volume through substrate-mode propagation. Indirect fluorescence from dye-quenched chemical species is collected and collimated with a high numerical aperture DOE. A filter blocks the excitation wavelength, and the resulting signal is detected as the chemical separation proceeds. Variations of this original design include changing the combination of reflective and transmissive DOEs and optimizing the high numerical aperture DOE with a rotationally symmetric iterative discrete on-axis algorithm. We will discuss the results of these implemented optimizations.

Original languageEnglish (US)
Pages (from-to)375-383
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2000
Externally publishedYes
EventOptoelectronic Interconnects VII; Photonics Packaging and Integration II - San Jose, CA, USA
Duration: Jan 24 2000Jan 26 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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