Diana Chin 1, Peter Taylor 1,2, YenTing Chiu 1, and Claire Gmachl 1 1 Princeton University, Princeton, NJ 08544, USA 2 Permanent Address: DeSales University,

Diana Chin1, Peter Taylor1,2, YenTing Chiu1, and Claire Gmachl11 Princeton University, Princeton, NJ 08544, USA

2 Permanent Address: DeSales University, Center Valley, PA 18034, USA

Background/ MotivationA 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 PatternMCT detector vs FLIR (Forward Looking InfraRed)

Camera

Inte

nsity

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!