IEEE Lasers and Electro-Optics Society Annual Meeting (LEOS)

Observation of quantum beating at 18.2 THz in Rb by parametric six-wave mixing

Changjun Zhu, Andrey A. Senin, Ju Gao, James Gary Eden

Published Dec 23, 2004• 0 citations

Abstract

Parametric six-wave mixing is observed in Rb and the modulation of 1365 nm signal at 18.2 THz is detected by observing the coherent radiation at 492 nm produced by summing the pump and the signal.

DOI: 10.1109/leos.2004.1363535

Related papers

Parametric Six-Wave Mixing and Quantum Beating at 608 cm-1in Rb

Changjun Zhu, Andrey A. Senin, James Gary Eden

Parametric six-wave mixing is achieved in Rb and quantum beating at 608 cm-1is investigated at different Rb number densities by observing coherent radiation at 495 nm produced by summing the pump and the signal

Quantum Electronics and Laser Science ConferenceDec 10, 20050 citations

Parametric Six-Wave Mixing and Quantum Beatings in Rb

Junfang He

ACTA PHOTONICA SINICAJan 1, 20090 citations

Observation of Quantum Beating from Two Coupled Parametric Six-Wave Mixing Signals in Rb

Zhu Chang-jun, Junfang He, Zhai Xue-jun +1 more

Chinese Physics LettersSep 1, 20084 citations

Quantum beating in Rb at 18.3THz (608cm−1) detected by parametric six-wave mixing and sum-frequency generation in LiIO3

Changjun Zhu, Y. Xiao, Andrey A. Senin +4 more

Physical Review AMay 8, 200716 citations

Observation of Quantum Beating from Two Coupled Parametric Six-Wave Mixing Signals in Rb

朱长军, 贺俊芳, 翟学军 +1 more

Chinese Physics LettersJan 1, 20080 citations

Observation of Quantum Beat in Rb by Parametric Four-Wave Mixing

Zhu Chang-jun, Junfang He, Xue Bing +1 more

Chinese Physics LettersJul 26, 20078 citations

IEEE Lasers and Electro-Optics Society Annual Meeting (LEOS)

Observation of quantum beating at 18.2 THz in Rb by parametric six-wave mixing

Changjun Zhu, Andrey A. Senin, Ju Gao, James Gary Eden

Published Dec 23, 2004• 0 citations

Publisher

Abstract

Parametric six-wave mixing is observed in Rb and the modulation of 1365 nm signal at 18.2 THz is detected by observing the coherent radiation at 492 nm produced by summing the pump and the signal.

DOI: 10.1109/leos.2004.1363535

Related papers

Parametric Six-Wave Mixing and Quantum Beating at 608 cm-1in Rb

Changjun Zhu, Andrey A. Senin, James Gary Eden

Quantum Electronics and Laser Science ConferenceDec 10, 20050 citations

Parametric Six-Wave Mixing and Quantum Beatings in Rb

Junfang He

Axially phase-matched parametric six-wave mixing was achieved in Rb and the parametric six-wave mixing signals in the infrared range were detected.Tunable signals in the visible range were produced by sum-frequency mixing of the pump laser and the parametric six-wave mixing signals in the infrared range.And,quantum beating at a frequency of 608 cm-1 was observed from the sum-frequency signal,indicating that the coherent properties of atoms and molecules can be studied by means of quantum beating recovered from parametric six-wave mixing signals.Axially phase-matched parametric six-wave mixing was achieved in Rb and the parametric six-wave mixing signals in the infrared range were detected.Tunable signals in the visible range were produced by sum-frequency mixing of the pump laser and the parametric six-wave mixing signals in the infrared range.And,quantum beating at a frequency of 608 cm-1 was observed from the sum-frequency signal,indicating that the coherent properties of atoms and molecules can be studied by means of quantum beating recovered from parametric six-wave mixing signals.

ACTA PHOTONICA SINICAJan 1, 20090 citations

Observation of Quantum Beating from Two Coupled Parametric Six-Wave Mixing Signals in Rb

Zhu Chang-jun, Junfang He, Zhai Xue-jun +1 more

Two processes of coupled difference-frequency axially phase-matched parametric six-wave mixing are carried out in Rb vapour by two-photon excitation using fs laser pulses, and parametric six-wave mixing signals in the infrared and near infrared regime are detected. The infrared parametric six-wave mixing signals are up-converted into the visible spectral range by sum-frequency mixing with the pump laser in a LHO 3 crystal. Moreover, quantum beating at 608 cm -1 , corresponding to the 7 s – 5d energy difference in Rb, is observed from the sum-frequency signal at 495 nm. As a result, we obtain modulated light signals in the visible, near infrared and infrared spectral ranges, and study the interference between 7s and 5d states of Rb.Two processes of coupled difference-frequency axially phase-matched parametric six-wave mixing are carried out in Rb vapour by two-photon excitation using fs laser pulses, and parametric six-wave mixing signals in the infrared and near infrared regime are detected. The infrared parametric six-wave mixing signals are up-converted into the visible spectral range by sum-frequency mixing with the pump laser in a LHO 3 crystal. Moreover, quantum beating at 608 cm -1 , corresponding to the 7 s – 5d energy difference in Rb, is observed from the sum-frequency signal at 495 nm. As a result, we obtain modulated light signals in the visible, near infrared and infrared spectral ranges, and study the interference between 7s and 5d states of Rb.

Chinese Physics LettersSep 1, 20084 citations

Quantum beating in Rb at 18.3THz (608cm−1) detected by parametric six-wave mixing and sum-frequency generation in LiIO3

Changjun Zhu, Y. Xiao, Andrey A. Senin +4 more

Axially phase-matched parametric six-wave mixing (PSWM) has been observed in Rb vapor by two-photon excitation of the atom $(5s\ensuremath{\rightarrow}\ensuremath{\rightarrow}7s,5d)$ with $\ensuremath{\sim}150\phantom{\rule{0.3em}{0ex}}\mathrm{fs}$ pulses, centered at $\ensuremath{\lambda}\ensuremath{\sim}769\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ and generated by a $\mathrm{Ti}:{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ laser system. For a peak laser pulse intensity of $30\phantom{\rule{0.3em}{0ex}}\mathrm{GW}\phantom{\rule{0.2em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}2}$, PSWM is observed for Rb number densities $([\mathrm{Rb}])>2.5\ifmmode\times\else\texttimes\fi{}{10}^{15}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$ whereas, for $[\mathrm{Rb}]=2.2\ifmmode\times\else\texttimes\fi{}{10}^{16}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$, the PSWM process is detectable for pump intensities above $\ensuremath{\sim}3\phantom{\rule{0.3em}{0ex}}\mathrm{GW}\phantom{\rule{0.2em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}2}$. Upconversion of the $1.367\phantom{\rule{0.3em}{0ex}}\mathrm{\ensuremath{\mu}}\mathrm{m}$ and $1.323\phantom{\rule{0.3em}{0ex}}\mathrm{\ensuremath{\mu}}\mathrm{m}$ signal waves into the visible $(\ensuremath{\lambda}\ensuremath{\sim}494\phantom{\rule{0.3em}{0ex}}\mathrm{nm})$ has been accomplished by sum frequency generation in ${\mathrm{LiIO}}_{3}$ , and quantum beating in Rb at $18.3\phantom{\rule{0.3em}{0ex}}\mathrm{THz}$ $(\ensuremath{\sim}608\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1})$ has been observed by monitoring the upconverted signal wave intensity produced in pump-probe experiments. These results broaden the scope of the wave packet detection scheme reported by Tran et al. [Opt. Lett. 23, 70 (1998)] in that a variety of coherent nonlinear optical processes $({\ensuremath{\chi}}^{(3)},{\ensuremath{\chi}}^{(5)},\dots{})$ appear to be suitable for observing the amplitude and phase of atomic (or molecular) wave packets.Axially phase-matched parametric six-wave mixing (PSWM) has been observed in Rb vapor by two-photon excitation of the atom $(5s\ensuremath{\rightarrow}\ensuremath{\rightarrow}7s,5d)$ with $\ensuremath{\sim}150\phantom{\rule{0.3em}{0ex}}\mathrm{fs}$ pulses, centered at $\ensuremath{\lambda}\ensuremath{\sim}769\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ and generated by a $\mathrm{Ti}:{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ laser system. For a peak laser pulse intensity of $30\phantom{\rule{0.3em}{0ex}}\mathrm{GW}\phantom{\rule{0.2em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}2}$, PSWM is observed for Rb number densities $([\mathrm{Rb}])>2.5\ifmmode\times\else\texttimes\fi{}{10}^{15}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$ whereas, for $[\mathrm{Rb}]=2.2\ifmmode\times\else\texttimes\fi{}{10}^{16}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$, the PSWM process is detectable for pump intensities above $\ensuremath{\sim}3\phantom{\rule{0.3em}{0ex}}\mathrm{GW}\phantom{\rule{0.2em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}2}$. Upconversion of the $1.367\phantom{\rule{0.3em}{0ex}}\mathrm{\ensuremath{\mu}}\mathrm{m}$ and $1.323\phantom{\rule{0.3em}{0ex}}\mathrm{\ensuremath{\mu}}\mathrm{m}$ signal waves into the visible $(\ensuremath{\lambda}\ensuremath{\sim}494\phantom{\rule{0.3em}{0ex}}\mathrm{nm})$ has been accomplished by sum frequency generation in ${\mathrm{LiIO}}_{3}$, and quantum beating in Rb at $18.3\phantom{\rule{0.3em}{0ex}}\mathrm{THz}$ $(\ensuremath{\sim}608\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1})$ has been observed by monitoring the upconverted signal wave intensity produced in pump-probe experiments. These results broaden the scope of the wave packet detection scheme reported by Tran et al. [Opt. Lett. 23, 70 (1998)] in that a variety of coherent nonlinear optical processes $({\ensuremath{\chi}}^{(3)},{\ensuremath{\chi}}^{(5)},\dots{})$ appear to be suitable for observing the amplitude and phase of atomic (or molecular) wave packets.

Physical Review AMay 8, 200716 citations

Observation of Quantum Beating from Two Coupled Parametric Six-Wave Mixing Signals in Rb

朱长军, 贺俊芳, 翟学军 +1 more

联合差别频率向轴的方向的二进程匹配阶段参量的六波浪的混合被二光子的刺激用 fs 激光脉搏在 Rb 蒸汽执行，并且参量的六波浪的混合在红外线、近的红外线的政体发信号被检测。红外线的参量的六波浪的混合信号是起来变换的进可见光谱由在 LHO3 晶体与泵激光混合的和频率的范围。而且，量在 608 cm-1 跳动，相应于 7 s - 在 Rb 的 5d 精力差别，在 495 nm 从和频率信号被观察。作为结果，我们获得调制轻信号在可见、近红外线、红外线光谱在 7s 和 5d 之间的干扰 Rb 说的范围，和研究。[从作者抽象]联合差别频率向轴的方向的二进程匹配阶段参量的六波浪的混合被二光子的刺激用 fs 激光脉搏在 Rb 蒸汽执行，并且参量的六波浪的混合在红外线、近的红外线的政体发信号被检测。红外线的参量的六波浪的混合信号是起来变换的进可见光谱由在 LHO3 晶体与泵激光混合的和频率的范围。而且，量在 608 cm-1 跳动，相应于 7 s - 在 Rb 的 5d 精力差别，在 495 nm 从和频率信号被观察。作为结果，我们获得调制轻信号在可见、近红外线、红外线光谱在 7s 和 5d 之间的干扰 Rb 说的范围，和研究。[从作者抽象]

Chinese Physics LettersJan 1, 20080 citations

Observation of Quantum Beat in Rb by Parametric Four-Wave Mixing

Zhu Chang-jun, Junfang He, Xue Bing +1 more

Two coupled parametric four-wave-mixing processes in Rb atoms are studied using perturbation theory, which reveals clear evidence of the appearance of quantum beat at 608 cm −1 , corresponding to the energy difference of the 7 s −5 d states of Rb atoms, in the parametric four-wave-mixing signals. A pump–probe technique is utilized to observe the quantum beat. Time-varying characteristics of the quantum beat are investigated using time-dependent Fourier transform. The results show that the time-varying characteristics of the quantum beat not only offers a sensitive detecting method for observing the decay of atomic wave packets, but also provides a potential tool for monitoring the dissociation of molecules.Two coupled parametric four-wave-mixing processes in Rb atoms are studied using perturbation theory, which reveals clear evidence of the appearance of quantum beat at 608 cm −1 , corresponding to the energy difference of the 7 s −5 d states of Rb atoms, in the parametric four-wave-mixing signals. A pump–probe technique is utilized to observe the quantum beat. Time-varying characteristics of the quantum beat are investigated using time-dependent Fourier transform. The results show that the time-varying characteristics of the quantum beat not only offers a sensitive detecting method for observing the decay of atomic wave packets, but also provides a potential tool for monitoring the dissociation of molecules.

Chinese Physics LettersJul 26, 20078 citations

\mathrm{Ti}:{\mathrm{Al}}_{2}{\mathrm{O}}_{3}

laser system. For a peak laser pulse intensity of $30\phantom{\rule{0.3em}{0ex}}\mathrm{GW}\phantom{\rule{0.2em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}2}$, PSWM is observed for Rb number densities $([\mathrm{Rb}])>2.5\ifmmode\times\else\texttimes\fi{}{10}^{15}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$ whereas, for $[\mathrm{Rb}]=2.2\ifmmode\times\else\texttimes\fi{}{10}^{16}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$, the PSWM process is detectable for pump intensities above $\ensuremath{\sim}3\phantom{\rule{0.3em}{0ex}}\mathrm{GW}\phantom{\rule{0.2em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}2}$. Upconversion of the $1.367\phantom{\rule{0.3em}{0ex}}\mathrm{\ensuremath{\mu}}\mathrm{m}$ and $1.323\phantom{\rule{0.3em}{0ex}}\mathrm{\ensuremath{\mu}}\mathrm{m}$ signal waves into the visible $(\ensuremath{\lambda}\ensuremath{\sim}494\phantom{\rule{0.3em}{0ex}}\mathrm{nm})$ has been accomplished by sum frequency generation in

{\mathrm{LiIO}}_{3}

, and quantum beating in Rb at

18.3\phantom{\rule{0.3em}{0ex}}\mathrm{THz}

$(\ensuremath{\sim}608\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1})$ has been observed by monitoring the upconverted signal wave intensity produced in pump-probe experiments. These results broaden the scope of the wave packet detection scheme reported by Tran et al. [Opt. Lett. 23, 70 (1998)] in that a variety of coherent nonlinear optical processes $({\ensuremath{\chi}}^{(3)},{\ensuremath{\chi}}^{(5)},\dots{})$ appear to be suitable for observing the amplitude and phase of atomic (or molecular) wave packets.