Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Optimal control of ultrafast selection.

K Yokoyama1, Y Teranishi, Y Toya

  • 1Advanced Photon Research Center, Japan Atomic Energy Research Institute, Kizu-cho, Kyoto 619-0215, Japan.

The Journal of Chemical Physics
|July 23, 2004
PubMed
Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Psychological stress during in vitro fertilization and embryo transfer is influenced by the patients' background and gender.

Reproductive medicine and biology·2018
Same author

Single-shot detection of mid-infrared spectra by chirped-pulse upconversion with four-wave difference frequency generation in gases.

Optics express·2013
Same author

Saturation of the free carrier absorption in ZnTe crystals.

Optics express·2013
Same author

Mandibular osteoblastic metastasis of poorly differentiated carcinoma of the thyroid gland.

International journal of oral and maxillofacial surgery·2009
Same author

Anion-catalyzed dissolution of NO2 on aqueous microdroplets.

The journal of physical chemistry. A·2009
Same author

IL23 differentially regulates the Th1/Th17 balance in ulcerative colitis and Crohn's disease.

Gut·2008

Researchers optimized laser pulses to selectively excite atomic cesium (Cs) states. This laser control method improved selectivity by 30%, demonstrating effective ultrafast state selection.

Area of Science:

  • Quantum optics
  • Atomic physics
  • Laser spectroscopy

Background:

  • Ultrafast laser control is crucial for selectively targeting atomic energy states.
  • Distinguishing closely lying excited states (e.g., Cs 7D(J)) is challenging due to limited laser bandwidth.
  • Adaptive pulse shaping offers a potential solution for precise state manipulation.

Purpose of the Study:

  • To achieve optimal laser control for ultrafast selective excitation of closely lying excited states in atomic cesium.
  • To demonstrate the effectiveness of adaptive pulse shaping in a closed-loop learning system for state selectivity.
  • To improve the contrast of the selection ratio compared to standard methods.

Main Methods:

  • Utilized adaptive pulse shaping of ultrashort laser pulses modulated by an eight-parameter electric field in a closed-loop system.

Related Experiment Videos

  • Employed a two-photon transition in atomic cesium (Cs: 6S-->7D(J), J=5/2 and 3/2).
  • Monitored two-color fluorescence yields to evaluate selectivity and optimize pulse shapes over fifty generations.

    • Main Results:

    • Obtained a pair of nearly transform-limited pulses as the optimal pulse shape after fifty generations.
    • Demonstrated the effectiveness of the "Ramsey fringes" mechanism for selective excitation.
    • Achieved an approximate 30% improvement in the contrast of the selection ratio.

    Conclusions:

    • Optimal laser control via adaptive pulse shaping enables highly selective excitation of closely lying atomic states.
    • The "Ramsey fringes" mechanism is effectively utilized and enhanced through optimized laser pulse shapes.
    • This technique significantly improves selectivity in ultrafast spectroscopy of atomic systems.