Special Issue "Multi-Color Laser Emission for the Generation of Ultrashort Optical Pulse"


A special issue of Applied Sciences (ISSN 2076-3417).

Deadline for manuscript submissions: closed (15 April 2014)

Special Issue Editor

Guest Editor
Prof. Dr. Totaro Imasaka
Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
Website: http://www.apan.cstm.kyushu-u.ac.jp/en/prof/rireki.html
E-Mail: imasaka@cstf.kyushu-u.ac.jp
Phone: +81-92-802-2883
Fax: +81-92-802-2888
Interests: analytical chemistry; analytical instrumentation; analytical science; trace analysis; lasers; non-linear optics; spectrometry

Special Issue Information

Dear Colleagues,

The pulse width of an electromagnetic wave is determined by the frequency band width of the wave used. Therefore, one femtosecond is the ultimate in pulse width for an “optical” wave. For this reason, several methods have been proposed for the generation of an ultrashort optical pulse. For example, resonance/non-resonance four-wave mixing would be one of the candidates for generating multi-color laser emission in an extremely wide spectral region, thus breaking the 1-fs barrier.

To date, numerous emission lines have been generated from the deep-ultraviolet to the near-infrared region (<45,000 cm−1). Such generations use a variety of techniques, such as four-wave Raman mixing in molecular hydrogen. This type of technique is promising for the generation of 1-fs optical pulses via phase locking and the Fourier synthesis of the emission lines. For verification, it would be necessary to develop a new method for measuring the pulse width, since the spectral band width approaches or is beyond one octave.

Ultrashort optical pulses can be utilized in a variety of applications in science and technology. For example, an ultrashort optical pulse can be used in the studies of ultrafast phenomena. More practically, a laser pulse shorter than 100 fs is reported to be useful in mass spectrometry for observing a molecular ion of triacetone triperoxide, an explosive used in terrorist attacks. A train of ultrashort optical pulses in the terahertz region, which has been generated in the optical cavity to enhance the nonlinear optical effect, would be employed as a clock pulse in optical computation/communication in future advanced industries. Therefore, it would be important to investigate a new frontier in the generation of multi-color laser emission for Fourier synthesis to generate ultrashort optical pulses and to publish a new issue of invited papers to clarify new trends in the state-of-the-art.

Prof. Dr. Totaro Imasaka
Guest Editor


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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 500 CHF (Swiss Francs). English correction and/or formatting fees of 250 CHF (Swiss Francs) will be charged in certain cases for those articles accepted for publication that require extensive additional formatting and/or English corrections.


  • multi-color laser
  • Fourier synthesis
  • ultrashort optical pulse
  • four-wave mixing
  • high-order sideband generation
  • ultrafast phenomena
  • data communication

Published Papers

No papers have been published in this special issue yet.

Last update: 22 November 2013

Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert