Zobrazeno 1 - 10
of 14
pro vyhledávání: '"V. S. Sudarshanam"'
Publikováno v:
Journal of Intelligent Material Systems and Structures. 10:314-321
Delamination detection is important in ensuring the safety and timely repair of structures. In this paper, a novel technique for detecting delamination is proposed. By embedding an optical fiber inside a structural component, the integrated strain al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44dc28671079623618be82340bd49d89
https://doi.org/10.1177/1045389x9901000407
https://doi.org/10.1177/1045389x9901000407
Publikováno v:
Optics Communications. 160:283-288
A cw degenerate phase conjugate resonator (PCR) with intracavity aero-optic turbulent flow is demonstrated using sodium vapor pumped with a low intensity cw laser. A turbulent helium jet at a high flow velocity of 250 m/s and forcing frequency of 18
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::110e0fb259f625d86a421364910286f0
https://doi.org/10.1016/s0030-4018(98)00679-8
https://doi.org/10.1016/s0030-4018(98)00679-8
Autor:
V. S. Sudarshanam
Publikováno v:
Optics letters. 17(9)
A new highly accurate linear method of dc phase-shift measurement based on spectrum analysis in a general optical homodyne interferometer is presented. The dc phase is superimposed onto a controllable ac phase modulation. The dc phase error is theore
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43bccc79b68868bebe80efa6b8531864
https://pubmed.ncbi.nlm.nih.gov/19794597
https://pubmed.ncbi.nlm.nih.gov/19794597
Interferometric measurement of fiber strain hysteresis and nonlinearity for sensitivity optimization
Autor:
K. Srinivasan, V. S. Sudarshanam
Publikováno v:
Optics letters. 15(23)
A simple and reliable fringe-counting method is used to determine the fiber static elastic response in fiber-optic sensors and modulators. Large strain hysteresis and nonlinearity have been observed in the commonly employed configuration of bonding a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09bf06ebab221e5755adb7de4fc7a61a
https://pubmed.ncbi.nlm.nih.gov/19771102
https://pubmed.ncbi.nlm.nih.gov/19771102
Autor:
K. Srinivasan, V. S. Sudarshanam
Publikováno v:
Optics letters. 14(22)
A new technique for dynamic phase calibration that utilizes only visual observation of the fringe pattern is demonstrated for use in fiber-optic interferometric sensors and phase modulators. The need for a photodetector and its associated electronic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e512e77939ef9bcd30c7c90396d3c96e
https://pubmed.ncbi.nlm.nih.gov/19759661
https://pubmed.ncbi.nlm.nih.gov/19759661
Autor:
K. Srinivasan, V. S. Sudarshanam
Publikováno v:
Optics letters. 14(2)
A new technique that provides linear measurement of dynamic phase change in a no-feedback, no-phase-bias fiber-optic interferometer is described. The phase measurement is unaffected by random changes in phase, source intensity, and fringe visibility.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35fde01d8a1bc3e31ce71f7c9caf2026
https://pubmed.ncbi.nlm.nih.gov/19749849
https://pubmed.ncbi.nlm.nih.gov/19749849
Autor:
V. S. Sudarshanam, K. Srinivasan
Publikováno v:
Journal of Applied Physics. 68:1975-1980
The PVF2 film‐based fiber‐optic phase modulator exhibits a resonance around 3.5 kHz. Existing reports of its characterization have considered only the linearity at nonresonance frequencies and the frequency response at a single drive voltage. A l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff5e39c5802241f611346f2677387408
https://doi.org/10.1063/1.346596
https://doi.org/10.1063/1.346596
Publikováno v:
CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1ad7f2962df94c3804ca28d589bb1db
https://doi.org/10.1109/cleo.1997.603217
https://doi.org/10.1109/cleo.1997.603217
Autor:
M. S. Shahriar, V. S. Sudarshanam, A.V. Turukhin, Joseph A. Musser, Philip R. Hemmer, Byoung S. Ham
Publikováno v:
Physical review letters. 88(2)
We report ultraslow group velocities of light in an optically dense crystal of Pr doped ${\mathrm{Y}}_{2}{\mathrm{SiO}}_{5}$. Light speeds as slow as 45 m/s were observed, corresponding to a group delay of 66 \ensuremath{\mu}s. Deceleration and ``sto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03bc39636afde071705153a5f718f00a
https://pubmed.ncbi.nlm.nih.gov/11801011
https://pubmed.ncbi.nlm.nih.gov/11801011
Turbulence-aberration correction with high-speed high-gain optical phase conjugation in sodium vapor
Publikováno v:
Optics letters. 22(15)
Optical aberrations that are due to high-speed turbulence in the aero-optical regime are corrected with optical phase conjugation based on coherent population trapping in sodium vapor. Experimental measurements of an unheated, forced helium jet in ai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cee30dbf1556bd99acba597bdbfdaab2
https://pubmed.ncbi.nlm.nih.gov/18185775
https://pubmed.ncbi.nlm.nih.gov/18185775