Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Nicholas Djeu"'
Publikováno v:
Journal of Raman Spectroscopy. 48:1132-1134
A penetrating Raman probe having a hypodermic needle probe head is desirable for measurements inside soft materials. The Raman probe reported in this paper not only is designed for penetration but also provides for self-referencing. This is a signifi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df3ab1e0336e9552aa083557f5028ddf
https://doi.org/10.1002/jrs.5178
https://doi.org/10.1002/jrs.5178
Autor:
Yutaka Shimoji, Nicholas Djeu
Publikováno v:
SPIE Proceedings.
A novel approach to the implementation of a fiber optic thermometer with high temperature capability is described. It utilizes a phosphor in the form of a microsphere. With this design, a fiber optic thermal probe having a useful range of 100-1,100
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c51a267a0b5784eed7082a5ffc04888
https://doi.org/10.1117/12.2179687
https://doi.org/10.1117/12.2179687
Publikováno v:
Physical Review A. 89
We demonstrate the Purcell spontaneous-emission enhancement effect for Raman scattering from gases in a $\ensuremath{\sim}$10-$\ensuremath{\mu}$m-long Fabry-P\'erot microcavity with a mode volume of $\ensuremath{\sim}$100 $\ensuremath{\mu}$m${}^{3}$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::295f5deeb397b09bcffce6e6f2b0d9e4
https://doi.org/10.1103/physreva.89.023811
https://doi.org/10.1103/physreva.89.023811
Publikováno v:
CLEO: 2013.
We report spontaneous emission enhancement of Raman scattering from CO 2 and O 2 gases in a ≈30 μm-long Fabry-Perot microcavity with a mode volume of 200 μm3 and a peak finesse of 50 000.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0676a6765d22754976ddafa510400303
https://doi.org/10.1364/cleo_si.2013.cm4o.6
https://doi.org/10.1364/cleo_si.2013.cm4o.6
Publikováno v:
Advanced Solid-State Lasers Congress.
We report spontaneous emission enhancement of Raman scattering from CO2 gas in a high finesse Fabry-Perot microcavity as a first step for a novel gas-sensing device.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17b7b327652dabd67e16566de884dee8
https://doi.org/10.1364/assl.2013.jth2a.12
https://doi.org/10.1364/assl.2013.jth2a.12
Autor:
Yutaka Shimoji, Nicholas Djeu
Publikováno v:
Review of Scientific Instruments. 87:093112
A novel heat-sinking, self-referencing fiber optic emission probe having a sapphire fiber probe head is described. The laser heating effect in a GaAs wafer (on a polytetrafluoroethylene (PTFE) platform) has been measured with the probe in both the no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ec8e714b3fb53d187228972e37be157
https://doi.org/10.1063/1.4963206
https://doi.org/10.1063/1.4963206
Autor:
Justin Cooper, Andreas Muller, Benjamin Petrak, Adam J. Hopkins, M. Peiris, Nicholas Djeu, Kumarasiri Konthasinghe
Publikováno v:
Applied Physics Letters. 108:091107
Purcell enhanced Raman scattering (PERS) by means of a doubly resonant Fabry-Perot microcavity (mode volume ≈ 100 μm3 and finesse ≈ 30 000) has been investigated as a technique for isotopic ratio gas analysis. At the pump frequency, the resonant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1891265355f8430fe93b9d21d910952
https://doi.org/10.1063/1.4943146
https://doi.org/10.1063/1.4943146
Autor:
C. Hauglie-Hanssen, Nicholas Djeu
Publikováno v:
IEEE Journal of Quantum Electronics. 30:275-279
The performance of a Tm:YVO/sub 4/ laser has been optimized by varying the thickness of the laser crystal and the reflectivity of the output coupler. This has led to the measurement of a slope efficiency of 48% for the laser output. Formulas describi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eac2271dec1bc0ff7c24ee64d0becda4
https://doi.org/10.1109/3.283770
https://doi.org/10.1109/3.283770
Publikováno v:
Applied optics. 31(6)
A tunable, single-frequency, injection-seeded, Q-switched Nd:glass laser has been operated. Laser pulses with joule-level energy and 30-ns duration were obtained between 1050 and 1057 nm.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ba139a5173cbb8a9227592249e9e34f
https://pubmed.ncbi.nlm.nih.gov/20720669
https://pubmed.ncbi.nlm.nih.gov/20720669
Publikováno v:
Optics letters. 18(2)
We have demonstrated an upconversion-pumped blue laser on the (1)G(4)-(3)H(6) band of Tm:YAG at cryogenic temperatures. Measurements were also made to assess the possibility of room-temperature upconversion-pumped lasers in Tm:YAG on both the (1)G(4)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6419480a56bda7233d5dee45b46ef1d2
https://pubmed.ncbi.nlm.nih.gov/19802055
https://pubmed.ncbi.nlm.nih.gov/19802055