Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Eiichi Sakuma"'
Publikováno v:
Optics Communications. 142:41-44
We have observed saturated absorption of the ν1 + ν3 band of 13C2H2 using an extended cavity laser diode and an erbium doped fiber amplifier. These narrow lines are very promising candidates for wavelength/frequency standards in the 1550 nm region
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9adcfa593ea2dd2cc83b7f9a79db25de
https://doi.org/10.1016/s0030-4018(97)00308-8
https://doi.org/10.1016/s0030-4018(97)00308-8
Publikováno v:
Optics Communications. 135:223-226
The accuracy of the optical sideband generation of an optical frequency comb generator (OFCG) was examined. The fundamental light and its second harmonics from a YAG laser were used as input to the OFCG and as pump light to an optical parametric osci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe13e785052411612c6c480cb51d5358
https://doi.org/10.1016/s0030-4018(96)00662-1
https://doi.org/10.1016/s0030-4018(96)00662-1
Publikováno v:
Optics Communications. 127:69-72
The coherence and the accuracy of a cw optical parametric oscillator (OPO) as an optical frequency divider was measured. The phase coherence between the pump and the signal or the idler was confirmed. The accuracy of the OPO as an optical frequency d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1cfad355e6d98ae91eb7706144c9e8aa
https://doi.org/10.1016/0030-4018(96)00141-1
https://doi.org/10.1016/0030-4018(96)00141-1
Publikováno v:
Optics Communications. 109:81-85
Absolute frequency measurement of the 70.5 μm wavelength (4.25 THz) line of a methyl alcohol (CH 3 OH) optically-pumped laser has been made by 47th-harmonic mixing with a Gunn diode (90 GHz) using a Nb-Nb point-contract Josephson junction (JJ). The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93c7090d4fa86d8ab0211abd9e2429ec
https://doi.org/10.1016/0030-4018(94)90742-0
https://doi.org/10.1016/0030-4018(94)90742-0
Publikováno v:
International Journal of Infrared and Millimeter Waves. 14:2345-2359
A system for measuring the absolute frequency of a far-infrared (FIR) laser is described. Josephson point contacts have been utilized in the system as a frequency harmonic mixer connecting microwaves and optically pumped CH3OH laser lines. The Joseph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::941cd67764e1b9b51c8b5686c5de990c
https://doi.org/10.1007/bf02085702
https://doi.org/10.1007/bf02085702
Publikováno v:
Optics Communications. 88:110-114
A high-power CO 2 laser (9P(34)) for use in optically pumping a CH 3 OH laser (70.5 μm) has been stabilized in the vicinity of the center of the CH 3 OH saturated absorption line by means of photoacoustic spectroscopy (PAS). The stabilized pump lase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a744fea851149eb8b71f56a25ddee393
https://doi.org/10.1016/0030-4018(92)90495-d
https://doi.org/10.1016/0030-4018(92)90495-d
Publikováno v:
The Review of Laser Engineering. 19:746-755
Key techniques for optical frequency measurements including laser stabilization, frequency conversion using nonlinear devices and a phase loc kare presented. Also described are conventional frequency comparison systems which link the 133Cs frequency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98cef599930eeee52dc4eeb4240e6380
https://doi.org/10.2184/lsj.19.8_746
https://doi.org/10.2184/lsj.19.8_746
Publikováno v:
Applied Physics Letters. 57:313-315
Harmonic generation and mixing in the 8∼80 GHz region has been studied in point‐contact junctions made with sharply tipped tungsten whisker and sintered polycrystalline YBa2Cu3O7−y or single‐crystal Bi2Sr2CaCu2Ox at room temperature. The sign
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45af7becf8adecc5f685d07b895f8cd7
https://doi.org/10.1063/1.104239
https://doi.org/10.1063/1.104239
Publikováno v:
SPIE Proceedings.
A CO2 laser for an optically pumped CHOH laser is stabilized on the center of the CH3OH absorption line by using a photo- acoustic spectroscopy. The frequency stability is measured by referring to a CO2 laser which is stabilized by Freed -Javan metho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72fafefdd014cc3d57a3ee654ffa0a41
https://doi.org/10.1117/12.978613
https://doi.org/10.1117/12.978613
Publikováno v:
Japanese Journal of Applied Physics. 35:3459
The influence of electrochromic damage on a phase-locked cw doubly resonant optical parametric oscillator (OPO) was examined for KTiOPO4(KTP) crystals grown by three different methods. The damage occurred at a relatively low E-field of ∼3 V/mm. Add
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ae8164f03865b8bacfb5bbf74f68c61
https://doi.org/10.1143/jjap.35.3459
https://doi.org/10.1143/jjap.35.3459