Zobrazeno 1 - 10
of 181
pro vyhledávání: '"Masaki Asobe"'
Autor:
Toshihiro Yoshihara, Hirokazu Takenouchi, Shin-nosuke Hashida, Masaki Asobe, Koji Enbutsu, Akio Tokura
Publikováno v:
Sensors, Vol 13, Iss 8, Pp 9999-10013 (2013)
This article describes a gas monitoring system for detecting nitrous oxide (N2O) gas using a compact mid-infrared laser source based on difference-frequency generation in a quasi-phase-matched LiNbO3 waveguide. We obtained a stable output power of 0.
Externí odkaz:
https://doaj.org/article/58dfb5d1d8d642e8b7f18f837b4bf582
Autor:
Masato Kato, Masaki Asobe, Saroeun Punhavan, Ryoichi Kasahara, Takeshi Umeki, Koji Enbutsu, Takushi Kazama
Publikováno v:
Optics express. 29(15)
A configuration for wavelength conversion and optical amplification by parametric interaction using a nonlinear optical device is proposed. It enables pump generation through second harmonic generation (SHG), difference frequency generation (DFG), an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81f1eb0a90fea565dbfc3b95f3e393b8
https://pubmed.ncbi.nlm.nih.gov/34614567
https://pubmed.ncbi.nlm.nih.gov/34614567
Autor:
Masaki Asobe, Daiki Yagi, Yuki Kawabata, Takeshi Umeki, Koji Enbutsu, Takushi Kazama, Ryoichi Kasahara
Publikováno v:
Optics Express. 30:9473
Optical parametric amplification in the range of 1.3–1.8 µm was demonstrated by using a periodically poled LiNbO3 (PPLN) waveguide as a nonlinear medium by varying the detuning of the pump wavelength. A wide range of detuning was enabled by using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbb4ccd056654b5b02f1d305c134871e
https://doi.org/10.1364/oe.453578
https://doi.org/10.1364/oe.453578
Publikováno v:
IEICE Transactions on Electronics. :586-593
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87977a64d3fdbbed82bb162b1518376d
https://doi.org/10.1587/transele.e101.c.586
https://doi.org/10.1587/transele.e101.c.586
Autor:
Koji Enbutsu, Masaki Asobe, Takushi Kazama, Keisuke Sugiyama, Saroeun Punhavan, Takahiro Kashiwazaki, Ryoichi Kasahara, Takeshi Umeki, Masato Kato
Publikováno v:
OECC/PSC
Taking advantage of multiple quasi-phase matching conditions for second harmonic generation and difference frequency generation processes, we proposed wavelength conversion and amplification of new wavelength range in a single LiNbO3 waveguide device
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05981260a742806fed172e2bc9712b65
https://doi.org/10.23919/ps.2019.8818069
https://doi.org/10.23919/ps.2019.8818069
Autor:
Akio Tokura, Shin-nosuke Hashida, Kazuhiro Shoji, Masaki Asobe, Hirokazu Takenouchi, Koji Enbutsu, Kazuyoshi Kitazaki, Toshihiro Yoshihara, Fumiyuki Goto
Publikováno v:
Scientia Horticulturae. 201:318-328
Previously, we found that rhizospheric N 2 O emissions from a tomato rockwool culture respond quickly and directly to nitrogen fertilization. Interestingly, the amount of emissions increased considerably when fertilization was shifted from day-time t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::530dadcb5210a1d1f8fd83f63ed49eaa
https://doi.org/10.1016/j.scienta.2016.02.014
https://doi.org/10.1016/j.scienta.2016.02.014
PPLN-Based Low-Noise In-Line Phase Sensitive Amplifier with Highly Sensitive Carrier-Recovery System
Publikováno v:
APCC
A PPLN-based in-line phase sensitive amplifier with a highly sensitive carrier-recovery system based on two-stage SHG/DFG parametric conversion achieves multi-stage amplification with a low noise figure of 3 dB and a 20-dB gain.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea22b2cce3b42bbd8307e697ccd781c1
https://doi.org/10.1587/transcom.2015ccp0017
https://doi.org/10.1587/transcom.2015ccp0017
Autor:
Hirokazu Takenouchi, Osamu Tadanaga, Yutaka Miyamoto, Koji Enbutsu, Takeshi Umeki, Masaki Asobe, Takushi Kazama
Publikováno v:
Journal of Lightwave Technology. 33:1326-1332
We demonstrate the first polarization-independent phase-sensitive amplification of a polarization-division multiplexing (PDM) signal. A novel polarization-diversity loop configuration using periodically poled LiNbO3 waveguides is proposed to achieve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c98efc318605b44ca23ed0eff361d8e
https://doi.org/10.1109/jlt.2014.2385867
https://doi.org/10.1109/jlt.2014.2385867
Publikováno v:
2017 22nd Microoptics Conference (MOC).
For precise study of volcano activity compact and in-situ CO 2 isotope abundance ratio is highly desirable. In this study, real time measurement of 12CO 2 and 13CO 2 was achieved by wavelength modulation spectroscopy using 2 μm DFB-LD. Measurement o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d39c15505fdb489eb0d222f2f69ba1b
https://doi.org/10.23919/moc.2017.8244561
https://doi.org/10.23919/moc.2017.8244561
Publikováno v:
Optics express. 25(4)
We devised a method for the measurement of the phase-matching curve of multiple quasi-phase-matched (QPM) LiNbOsub3/subwaveguide under conditions of high-power second-harmonic generation. The data obtained revealed that the phase-matching condition c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c933dbc5d24cb72bdd436693644e7c5e
https://pubmed.ncbi.nlm.nih.gov/28241576
https://pubmed.ncbi.nlm.nih.gov/28241576