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Volume 20, Issue 8
Displaying 1-12 of 12 articles from this issue
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Tatsuo YAJIMA1992 Volume 20 Issue 8 Pages 605
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSDownload PDF (133K) -
Yosihiro NAMBU, Hiroyuki YOKOYAMA, Takanori SHIMIZU1992 Volume 20 Issue 8 Pages 606-613
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSWavelength-sized microcavity lasers have very unique and attractive features; One is a threshold-less lasing action, and the other is an ultrafast response capability. The latter property comes from the extremely short cavity round-trip time and the resulting short photon life time of the microcavity. The 100 Gbit/s response of a dye-solution planar microcavity laser has been demonstrated under an quasi-optical-pulse-train excitation.View full abstractDownload PDF (795K) -
Hideyuki NISHIDA, Akihiro MORIMOTO, Tetsuro KOBAYASHI1992 Volume 20 Issue 8 Pages 614-619
Published: August 29, 1992
Released on J-STAGE: August 04, 2010
JOURNAL FREE ACCESSIn this paper the generation of ultrashort light pulses with Cerenkov radiation (CR) is reviewed. We discuss the pulse width of CR from a point-charged particle, and introduce a technique of pulse compression using conical and cylindrical gratings. It is shown theoretically that subfemtosecond pulses can be generated with this CR compression technique. To increase the intensity of coherent CR pulses, a bunched pulse electron beam containing a large number of electrons is useful. A system of intense far-infrared monocycle pulse generation from a photoelectron beam pulse is also introduced. This system can be used to generate megawatt, femtosecond pulses.View full abstractDownload PDF (646K) -
Koichi YAMAKAWA, Hiroyuki SHIRAGA, Yoshiaki KATO1992 Volume 20 Issue 8 Pages 620-630
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSThe present status of high power, ultrashort pulse generation in Nd: glass lasers is reviewed. Genera-tion mechanism of a pedestal component and a new technique for pedestal reduction are discussed. Results of a 30-TW, 1.0-ps laser pulse at 1053 nm generated by chirped-pulse amplification in a large-aperture Nd: glass laser system are presented. A peak-to-prepulse intensity ratio of better than 107 was obtained by temporal windowing of a self-phase-modulated chirped pulse before amplification and compression.View full abstractDownload PDF (1328K) -
Hidetoshi NAKANO, Yuzo ISHIDA1992 Volume 20 Issue 8 Pages 631-637
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSSelf-induced transparency (SIT) is a kind of coherent transient phenomena in two-level atomic system. The optical pulse with an area that is an integer multiple of 2π, which causes SIT in an absorber, is stable and a kind of soliton. Thus SIT is expected to be useful in pulse compression and pulse shaping. In this paper, we discuss some problems in experiments of SIT and surveys the experimental results of SIT. It is also described the recent experimental results of coherent nonlinear pulse propagation in BiI3 crystal using tunable sub-picosecond pulses.View full abstractDownload PDF (763K) -
Masataka NAKAZAWA, Yasuo KIMURA, Kazunori SUZUKI1992 Volume 20 Issue 8 Pages 638-652
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSThe recent development of erbium-doped fiber amplifiers has aroused great interest in the observation of coherent pulse propagation in resonant fiber waveguides. The self-induced transparency (SIT) soliton offers a possibility of pulse shaping and standardization that is different from nonlinear Schrodinger (NLS) soliton formation. The guiding of radiation by fiber structure eliminates diffraction effects and makes possible the interaction of the radiation over long distances. To date, however, there has been no report of experiments on SIT solitons and coherent π pulse propagation in a fiber waveguide. In this paper, we describe the observations of self-induced transparency solitons and coherent π pulse propagation in an erbium-doped resonant fiber waveguide. We also describe NLS soliton propagation and the coexistence of NLS and SIT solitons, which contribute to a complete understanding of nonlinear dispersive wave propagation in a resonant medium.View full abstractDownload PDF (2135K) -
Kenji WADA, Yoshio CHO1992 Volume 20 Issue 8 Pages 653-661
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSUltrafast optical switching utilizing coherent interaction is reviewed in terms of its principle, problems, applications and features in conjunction with the result of numerical calculations.View full abstractDownload PDF (919K) -
Kazunori SUZUKI, Hirokazu KUBOTA, Masataka NAKAZAWA1992 Volume 20 Issue 8 Pages 662-672
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSRecent progress in optical soliton communication using erbium-doped fiber amplifiers is described. Soliton data signals at 10 Gbit/s have been transmitted without error over 1200 km by using 24 EDFAs. New techniques for soliton control in the time and frequency domains are also described.View full abstractDownload PDF (1201K) -
-New Approach from External Modulation-Masatoshi SUZUKI1992 Volume 20 Issue 8 Pages 673-683
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSMode-locking and gain-switching of semiconductor lasers have been reviewed from a view point of an optical short pulse generator for soliton transmission. A new approach from an external modulation using an electroabsorption modulator to generation of transform- limited optical short pulses is demon-strated. Transform-limited optical pulses up to 20 GHz repetition rates were generated just using a sinusoidal modulation of an InGaAsP electroabsorption modulator without any optical resonators and optical filters. The shape of the modulator-generated pulse is very closed to sech2 shape, and both the pulse width and the repetition rate can be easily varied by electrical signals. The promising future of the simple and stable optical pulse generation using the electroabsorption modulator was confirmed by 2.5 Gb/s-6400 km soliton data transmission using circulating loop experiments.View full abstractDownload PDF (1317K) -
Kimihiro OHTA1992 Volume 20 Issue 8 Pages 684-690
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSUltrafast semiconductor circuits related to the electro-optic sampling technique have been reviewed. The circuits are about very short pulse lasers, cross-talk in circiuts, THz transtmission lines, bending effects of transmission lines, THz radiation into the air, modulators and ultrafast detectors. The state-of-the-art of the electro-optic sampling technique and its problems are given.View full abstractDownload PDF (764K) -
Takashi YABE1992 Volume 20 Issue 8 Pages 691-696
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSA multi-dimensional thermo-hydrodynamic code is developed and is applied to laser material. proces sing. The code treats, for the first time, the multi-dimensional dynamics of the evaporation process from solid state to gas vapor in the psec and msec regimes. A hydrocode is based on a newly developed highly-accurate scheme CIP-CUP (Cubic-Interpolated Pseudoparticle, Combined Unified Procedure). The simulation suggests that the wavelength-dependent absorption in metal vapor causes very high temperature and leads to melting instability for long-wavelength lasers.View full abstractDownload PDF (911K) -
1992 Volume 20 Issue 8 Pages i
Published: August 29, 1992
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSDownload PDF (1658K)
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