Transcript presentation

Diana Chin1, Peter Taylor1,2, YenTing Chiu1, and Claire Gmachl1
1 Princeton University, Princeton, NJ 08544, USA
2 Permanent Address: DeSales University, Center Valley, PA 18034, USA
Background/ Motivation
 A more refined laser beam is necessary for the QC
laser to be effective in gas detection applications.
 Part I: Imaging the far-field pattern of the original
laser beam
 Part II: Coupling the light into fibers and comparing
the resulting intensity profiles
Imaging the Far-field Pattern
Intensity
 MCT detector vs FLIR (Forward Looking InfraRed) Camera
Angle (degrees)
Mode Filtering with Fibers
Thank you to the Harrington group at Rutgers University for the fibers!
Results
Conclusion
•
Based on the close resemblance of the resulting far-field
pattern to a Gaussian profile, the single mode fiber was
successful in refining the QC laser beam by filtering out the
majority of its higher order modes.
•
Further experiments are necessary to determine if better
alignment and coupling of the laser will yield an intensity
distribution even closer to a true Gaussian.
•
Holds great potential for future environmental applications,
particularly in the detection of atmospheric gases.
Thank You!