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Multi-Channel Fabry-Perot Etalon. E. Dagher , R. Liu, J. Vaillancourt. Outline. Objectives Division of Work Background Mirror Fabrication Cavity Fabrication Biomaterials. Sample Preparation Test Procedure Results Timeline Future Work Conclusion. Objective.

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multi channel fabry perot etalon

Multi-Channel Fabry-Perot Etalon

E. Dagher, R. Liu, J. Vaillancourt

outline
Outline
  • Objectives
  • Division of Work
  • Background
  • Mirror Fabrication
  • Cavity Fabrication
  • Biomaterials
  • Sample Preparation
  • Test Procedure
  • Results
  • Timeline
  • Future Work
  • Conclusion
objective
Objective

To design and build a proof of concept experiment for a novel high sensitivity biosensor based on a Fabry-Perot cavity

slide4

Division of Work

  • Initial Design Simulations and Evaluation
    • Sims Approach Research and Evaluation
    • MS Excel
  • Biomaterial Sample Prep

Rui:

Jarrod:

  • Fabricate device for testing
    • Obtain materials
    • Assemble the prototypes
  • Build test setup

Emile:

  • Write test programs to acquire data
    • Control instruments
    • Demodulate the signal
    • Graph results
    • Automate the testing/graphing procedure
slide5

R=.3

R=.9

R=.5

λm+1

λm-1

λm

  • Important Properties of a F-P Cavity:
  • Free Spectral Range:
  • Finesse:
  • Resonant Condition: where m=1,2,3 …

Background

slide6

Glass

Glass

Glass

Glass

Glass

Glass

Glass

Glass

Glass

Glass

Air

Air

Mirrors

Glass

Glass

Glass

Glass

Glass

Glass

BIO Material

slide7

Mirror

Mirror

Mirror

Mirror

Glass

Glass

Glass

Glass

Glass

Glass

Glass

Glass

Glass

Glass

Air

Air

Air

Air

Glass

Glass

Glass

Glass

BIO Material

slide8

Mirror Fabrication

  • Mirrors will be formed using AJA 7000 Sputtering System
    • Many metal coatings available
      • Au, Ag, Al, Ti, Ni, Cr
      • Low pressure for high quality films
      • Precise control of the thickness
slide9

Mirror Fabrication

Glass

Titanium

Gold

slide10

Mirror Testing

Transmission @ 1.55µm

Glass: 87%

10Å Ti / 40Å Au: 47%

10Å Ti / 70Å Au: 18%

10Å Ti / 40Å Au

10Å Ti / 70Å Au

slide15

Cavity Fabrication

  • Reason for Failure:
  • Only 150Å of gold
  • Missing the “sticking layer”
  • Solution:
  • Use a sticking layer
  • Can be Ni, Ti, Cr
biomaterials
Biomaterials
  • Biomaterials in cavities:
    • Protein G
    • IgG
    • Fab
  • Same Concentration for all experimental setups
slide18

Coating Biomaterials

Glass

Protein G

IgG

Protein G

IgG

Glass

Gold

slide20

Testing Block Diagram

GPIB/IEEE Cable

PC/Matlab

Single Mode Fiber

Micron Optics si720

Optical Sensing Analyzer

Detected light

Power Input

Test Setup

matlab gui interface
Matlab GUI Interface

Start

Folder/File location to save data

Start/Stop Wavelengths

Figure

test automation block diagram
Test Automation Block Diagram

Run Matlab GUI

Locate File/Folder Location

to save data

Start/Stop Wavelengths

-Set the Start/Stop Wavelengths

on Optical Analyzer

-Start Sweeping through wavelengths

-Get data results and save them

in specified folder

Start

Show Results

slide28

Future Work

1. Multi-channel Fabry-Perot cavity waveguide structure.

Mirrored Ends

Multiple Channels

Silicon Waveguide

Silicon Substrate

Silicon substrate

slide29

Future Work

1. Multi-channel Fabry-Perot cavity waveguide structure

2. Integrated with microfluidics

Biomaterials

Fluid Cavity

Polymer

Cap

slide30

Waveguide with microfluidics

  • Benefits:
  • Reduced device size
  • Can create more channels for biomaterials
  • Enables mass production
  • Uniform device size

Biomaterials

slide31

Conclusion

  • Fabrication of Cavities is feasible
  • Goal has been reached
  • Introduce mirror reflectivity as a variable when testing
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