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Measurements and imaging of optical gain in optically pumped alkali-rare gas systems
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View: Figures


Image of FIG. 1.
FIG. 1.

Computed absorbance spectra for the Cs D1 multiplet at 894.3 nm: (a) low pressure limit, Doppler broadening at 300 K, illustrating the hyperfine structure and (b) 500 Torr Kr + 75 Torr C2H6 at 295 K, illustrating collisional broadening and red-shifting effects.

Image of FIG. 2.
FIG. 2.

Absorbance and gain spectra for Cs(D1) at 894 nm as a function of pump intensity on the D2 line at 852 nm. Cell conditions: 500 Torr Kr + 75 Torr C2H6 at 338 K. Pump intensities in W/cm2 are indicated on the curves. The locations of the pressure-shifted hyperfine peaks are marked on the g v L = 0 line.

Image of FIG. 3.
FIG. 3.

Three-dimensional image of spatially resolved gain and absorption on the D1 line at a fixed probe laser frequency tuned to maximum gain. Upper image: pump laser on resonance with D2 absorption resulting in gain near the center of the pump beam; lower image: pump laser off resonance, no D2 excitation. The grey-scale bar indicates the range of gain and absorbance. The white curve denotes zero (transparency). Cell temperature: 340 K; pump intensity: 578 W/cm2. Each pixel is 30 μm square.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Measurements and imaging of optical gain in optically pumped alkali-rare gas systems