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Volume 28, Issue 8
Displaying 1-15 of 15 articles from this issue
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Takao KOBAYASHI2000 Volume 28 Issue 8 Pages 471
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
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Fumihiko KANNARI2000 Volume 28 Issue 8 Pages 472-473
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
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2000 Volume 28 Issue 8 Pages 473-473,478
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSDownload PDF (436K) -
Kazunori NAGANUMA2000 Volume 28 Issue 8 Pages 474-478
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSIn view of the recent progress in ultrashort pulse sources and the Fourier-synthesisapparatus, the requirementsto the complete (amplitude and phase) determination of possibly-complex femtosecond opticalsignal becomeincreasingly demanding and multifold. This paper reviews methods currently serviceable to such measurements, which include field cross-correlation, optical sampling, iterative calculations on correlation data, aswell as direct detection schemes of the spectral phase. Favorable aspects and prospects of each approaches arealso addressed.View full abstractDownload PDF (1025K) -
Fumihiko KANNARI, Nobutatsu TAKEI, Mariko SHIOZAWA2000 Volume 28 Issue 8 Pages 479-485
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSFourier shaping of ultrashort laser pulses can offer additional functions to mode-lock lasers, and opens upvarious applications, including optical information processing, coherent spectroscopy, and quantum molecularcontrol. Furthermore, using light waves whose temporal aspects can be almost-arbitrarily programmed, wecan introduce optimization algorithms into the temporal domain of optical systems and even into quantumsystems. In this tutorial review, first, basic concept of Fourier pulse shaping is described, then, special emphasisis placed on adaptive shaping for controlling unknown light-matter interactions.View full abstractDownload PDF (1454K) -
Takashi KUROKAWA, Hirokazu TAKENOUCHI, Hiroyuki TSUDA2000 Volume 28 Issue 8 Pages 486-491
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSUltra-short optical pulse shaping based on time-to-space conversion has been widelydemonstrated by usingfree-space optics with diffraction grating pairs and lenses. We have proposed time-to-space conversion opticalsignal processing using an arrayed-waveguide grating. The arrayed-waveguide grating system has the advantagesof a long time window, and well suites to handle subpico-to several picosecond pulses. Moreover, it iscompact, compatible with fiber optics, and can be integrated with functional photonic devices. We introduceseveral applications of this technology to terabit communication systems, such as pulse shaping, dispersioncompensation, differential processing, optical phase-shift keying detection and optical CDM encoder and decoder.View full abstractDownload PDF (1034K) -
Mikio YAMASHITA, Kenichiro MATSUMOTO, Lin XU2000 Volume 28 Issue 8 Pages 492-499
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSNovel chirp compensation techniques using a liquid-crystal spatial light modulator (SLM) only and a combinationof the SLM and the conventional optics for generation of monocycle optical pulses are introduced. Inaddition to the principle of chirp compensation of ultrabroad-band pulses by the SLM in the 4-f pulse-shapingconfiguration, the effects of the SLM structure on chirp compensation are described based on a computeranalysis. Furthermore, the practical capability of the hybrid chirp compensators of the SLM and the prism pairand/or the grating pair is discussed. Finally, the experimental demonstration of the SLM and prism-pair hybridchirp compensation for generation of sub-5 fs, two-optical-cycle pulses is presented.View full abstractDownload PDF (1294K) -
Muhammad NURHUDA, Akira SUDA, Katsumi MIDORIKAWA2000 Volume 28 Issue 8 Pages 500-505
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSWe present results from interaction of helium with intense, femtosecond laser pulses. Using spectral methodfor selecting the harmonics, it can be shown that under certain condition, a single femto or subfemtosecondharmonic pulses as well as train of attosecond pulses can be generated from femtosecond intense driving field.View full abstractDownload PDF (1015K) -
Masayuki KAKEHATA, Roka UEDA, Hideyuki TAKADA, Kenji TORIZUKA, Minoru ...2000 Volume 28 Issue 8 Pages 506-510
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSGeneration of time-dependent polarization pulses is demonstrated by combining two perpendicularly polarized, high-intensity laser pulses. The time evolution of the polarization state is measured bya combination offrequency-resolved optical gating (FROG) and spectral interferometry (SI) called POLLIWOG. The polarizationstates of the generated pulses are controlled by changing the relative delay. We also measured the effect ofthe pulse combination on the ionization of Xe atoms. The results confirm the changes in the polarization stateand directions with the relative delay.View full abstractDownload PDF (886K) -
Haruyasu ITOH, Tsuneyuki URAKAMI, Narihiro YOSHIDA, Yasunori IGASAKI, ...2000 Volume 28 Issue 8 Pages 511-515
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSWe demonstrated reflect-type pulse shaping of high-power femtosecond pulses from a Ti: sapphire regenerativeamplification system that generates 4.0-μJ pulses of less than 70-fs pulsewidth at a 250-kHz repetition ratewith an average power of 1.0W. The PAL-SLM (Parallel Aligned nematic Liquid crystal Spatial Light Modulator) contained in our pulse shaping apparatus was evaluated and was able to modulate high peak powerpulses up to 2.4×107W. As a result, the pulse shaping system was used to generate high-power double pulses, as was confirmed by FROG (Frequency Resolved Optical Gating).View full abstractDownload PDF (1963K) -
Masaru YAEGASHI, Yuji MATSUURA, Mitsunobu MIYAGI2000 Volume 28 Issue 8 Pages 516-519
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSWe fabricated a launching coupler for hollow fibers by using combination of a lens and a tapered hollowwaveguide. The tapered-hollow glass waveguides with a polymer and a silver thin films on the inside werefabricated by a liquid-phase deposition technique. The tapered-waveguide with a 1.4mm inner diameter at theinput end, 0.7mm at the output end, and the length of 10cm shows transmission losses of 0.08-0.12 dB forEr: YAG laser.View full abstractDownload PDF (805K) -
Fumitaka MURASE, Fumio TAKAHASHI, Kazuhiko ISHIKAWA, Katsuhiko ASADA, ...2000 Volume 28 Issue 8 Pages 520-522
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
JOURNAL FREE ACCESSA nondestructive method for measuring local weight density has been developed which utilizes ahybrid sensorsystem, i. e., a contactor and an optical sensor. The accuracy of this system as defined by the correlationcoefficient between light intensity and the local weight density is demonstrated to be above 90%.View full abstractDownload PDF (541K) -
Kunihiko WASHIO2000 Volume 28 Issue 8 Pages 523-525
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
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Hiromasa ITO, Yohei KOBAYASHI, Toshimasa KOZEKI, Nobuhiko SARUKURA, Fu ...2000 Volume 28 Issue 8 Pages 526-547
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
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Kazuo KURODA2000 Volume 28 Issue 8 Pages 548-555
Published: August 15, 2000
Released on J-STAGE: March 17, 2010
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