Ultrahigh-Resolution Spectroscopy: Photon Echoes in YAl O 3 : Pr 3 + and La F 3 : Pr 3 +
作者： R. M. Macfarlane , R. M. Shelby , R. L. Shoemaker
DOI: 10.1103/PHYSREVLETT.43.1726
关键词: Magnetic field 、 Resolution (electron density) 、 Free induction decay 、 Physics 、 Nuclear magnetic resonance 、 Atomic physics 、 Laser linewidth 、 Spectroscopy 、 Photon 、 Ultrahigh resolution
摘要: By using a new, delayed-heterodyne photon-echo technique, we have obtained spectral resolving power of 1.2\ifmmode\times\else\texttimes\fi{}${10}^{11}$, measuring 2.0-kHz linewidth (half width at half maximum) for the 6105-\AA{} $^{1}D_{2}\ensuremath{\leftrightarrow}^{3}H_{4}$ transition YAl${\mathrm{O}}_{3}$: ${\mathrm{Pr}}^{3+}$ in an external magnetic field. This appears to be highest resolution ever optical spectroscopy. Measurements were also made on corresponding La${\mathrm{F}}_{3}$: giving 5 kHz. Optical free induction decay gave incorrect results (i.e., significantly broader linewidths).
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