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Volume 30, Issue 4
Displaying 1-8 of 8 articles from this issue
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Topical Papers on Photorefractive Materials and Their Applications
Topical Paper
Laser Reviews
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Kazuo KURODA2002 Volume 30 Issue 4 Pages 158
Published: April 15, 2002
Released on J-STAGE: October 21, 2009
JOURNAL FREE ACCESSDownload PDF (137K) -
Satoshi IWAMOTO, Tsutomu SHIMURA, Kazuo KURODA2002 Volume 30 Issue 4 Pages 159-165
Published: April 15, 2002
Released on J-STAGE: October 21, 2009
JOURNAL FREE ACCESSSemiconductor photorefractive quantum well (PR-QW) devices have high sensitivity and fast response because of large excitonic electrooptic effects and large carrier mobilities. Taking advantages of these attractive features, interesting applications using PR-QW devices as dynamic holographic media have been demonstrated. Here basic features of PR-QW devices, materials, and device configurations are reviewed. In addition, two important applications of PR-QW devices, adaptive vibration measurement and optical imaging through scattering media, are also discussed.View full abstractDownload PDF (813K) -
Akiko HIRAO, Kazuki MATSUMOTO, Takayuki TSUKAMOTO, Hideyuki NISHIZAWA2002 Volume 30 Issue 4 Pages 166-170
Published: April 15, 2002
Released on J-STAGE: October 21, 2009
JOURNAL FREE ACCESSTen years have passed since discovery of photorefractive polymer. This paper reviews the progress made respecting photorefractive polymers. The mechanism of the photorefractive effect in photorefractive polymers is also explained. Finally the applications of photorefractive polymers are described.View full abstractDownload PDF (348K) -
Hideki HATANO, Kenji KITAMURA2002 Volume 30 Issue 4 Pages 171-176
Published: April 15, 2002
Released on J-STAGE: October 21, 2009
JOURNAL FREE ACCESSIn this paper, the fundamental framework and developments of holographic optical memory, recent progress in system implementation and recording materials have been reviewed. The optical storage technology has matured to the level of achieving a fast transfer rate exceeding 109 bits/s. The major development in photorefractive recording materials is the two-color recording in LiNbO3, which supersedes the longstanding issue of destructive readout. It has been realized that near-stoichiometric LiNbO3 is promising to tailor multi-energy levels owing to the reduced non-stoichiometric defects in this material.View full abstractDownload PDF (474K) -
Takashige OMATSU2002 Volume 30 Issue 4 Pages 177-181
Published: April 15, 2002
Released on J-STAGE: October 21, 2009
JOURNAL FREE ACCESSA highly bright radiation from a single-stripe high power laser diode with a photorefractive phase conjugate mirror was presented. The laser diode was then operated in a narrow-band and generated a single-lobed far-field.View full abstractDownload PDF (427K)
Laser Original
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Kazuyoku TEI, Fumiaki MATSUOKA, Takashi ARISAWA2002 Volume 30 Issue 4 Pages 182-184
Published: April 15, 2002
Released on J-STAGE: October 21, 2009
JOURNAL FREE ACCESSA LD-pumped sigzag slab Nd:YAG oscillator-amplifier system using a photorefractive ring self-pumped phase conjugate mirror is developed. The photorefractive phase conjugator is optimized in the point view of high-energy pulse capacity, fidelity of phase conjugation and stability. The laser system generates the IR laser pulses of 600 mJ and the second harmonic pulses of 250 mJ at the repetition rate of 100 Hz. Both the IR and the second harmonic have 1.1 times diffraction limited beam quality.View full abstractDownload PDF (361K)
Regular Paper
Laser Review
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Chiyoe YAMANAKA, Shuji SAKABE2002 Volume 30 Issue 4 Pages 185-192
Published: April 15, 2002
Released on J-STAGE: October 21, 2009
JOURNAL FREE ACCESSA vast new field of unique and exciting high power laser applications has now opened. The ability to generate high intensity of laser pulse radiation leads to the creation of extreme conditions. Typical performance of laser parameters are the peak power 100 TW, pulse duration 10 fs and pulse energy 1 joule. When the laser pulse concentrates on a target, the following extreme conditions can create never before achieved in the laboratory, the power intensity 1020 W/cm2, electric field 1011 V/cm, magnetic field 109 gauss, temperature 1010 °K, pressure 109 bar and acceleration 1026 cm/s. These advanced laser systems have been accomplished by a new technique chirped pulse amplification and the development of optronics materials. The tabletop lasers are implemented which can deliver the very high power comparable to the large fusion lasers such as NOVA and GEKKO XII. The relativistic regime has been provided by using a PW laser in the new era.View full abstractDownload PDF (806K)
Laser Original
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Shigeki TOKITA, Hideaki NIKI, Iwao KITAZIMA2002 Volume 30 Issue 4 Pages 193-197
Published: April 15, 2002
Released on J-STAGE: October 21, 2009
JOURNAL FREE ACCESSAn inexpensive and portable gas photoacoustic monitoring system using a near-infrared diode laser was developed and tested. High sensitivity was achieved by a resonant-type photoacoustic cell with short optical path length. The minimum detectable acetylene concetration was about 100 ppbV (at atmospheric pressure), which corresponds to a minimum detectable absorption coefficient of approximately 1.1 × 10-8 cm-1. Photacoustic excitation and noise spectrums were also investigated.View full abstractDownload PDF (292K)
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