Rb Abs. w/ CH4 Residual Fit Vs. Lorentzian

Broadening Coefficient (MHz/Torr) This Work

Rotandaro Run 1 Run 2 Run 3

He 18.9±0.2 19.01±8e-005 18.21±3e-005 17.62±5e-005

Ne 9.84±0.1 9.38±5e-005 9.579±5e-005 8.86±7e-005

Shift Coefficient (MHz/Torr) This Work

Rotandaro Run 1 Run 2 Run 3

He 4.71±0.04 5.17±8e-005 4.794±3e-005 4.5664±2e-005

Ne -0.90±0.02 -0.8121±2e-005

-0.876±2e-005 -1.054±3e-005

• Diode Pumped Alkali Laser (DPAL) • Air Force Interest in DPAL

• Thermal Management • Short Logistics Trail

• Apparatus

Rb Absorbance with CH4 Mixing Gas

Cold Plates

Fit Equations

Joseph W. Young*, David A. Hostutler, and Greg A. Pitz *East Mountain High School, Sandia Park, NM

Identifying Asymmetry in the Collisionally Broadened D1 Line of a

Rubidium DPAL

+ − −

− − + = ) ) ( ) ((

)) ]( [ ] [ ( ) , , , ; ( 2 2 0

0

γ ω ω ω

ω ω ω γ ω γ ω s

s s fit

B Sin B Cos A B A I

Shift n

Width Lorentzian n

n B

e lN A

s

n

≈ =

≈ =

=

= −

1

1

0

0 0

β ω

α γ

β

π

σ α

Coefficient B (CH4)

Introduction

Results

Special thanks to Wade Klennert, Donald Stalnaker, and Billy Pike

Acknowledgements

• Verification of Test Stand Accuracy

Conclusion / Future Work

Heat Pipe Spectrometer Full Spectrum

White Light Source

Coefficient A (CH4)

Frequency (Hz)

Frequency (MHz)

Abs

orba

nce

Abs

orba

nce

Res