Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Ashish Madhukar Vengsarkar"'
Autor:
Ashish Madhukar Vengsarkar, John E. Sipe, Paul Joseph Lemaire, J. B. Judkins, Vikram Bhatia, Turan Erdogan
Publikováno v:
Journal of Lightwave Technology. 14:58-65
Optical fiber communication systems that use optical amplifiers are increasingly seeking high-performance devices that function as spectrally-selective band-rejection filters. For example, ASE filters that improve erbium amplifier performance and ban
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38c5fd185407fd623ecadc4bb1158ef0
https://doi.org/10.1109/50.476137
https://doi.org/10.1109/50.476137
Autor:
Jonathan A. Greene, Ashish Madhukar Vengsarkar, Brian R. Fogg, Richard O. Claus, Kent A. Murphy
Publikováno v:
Smart Materials and Structures. 1:243-249
The authors present an overview of results obtained with an optical fiber vibration-mode sensor, a new type of distributed, optical fibre sensor whose strain sensitivity varies as a function of length along the sensor. The change in the sensor's stra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25711609f5981365a3dc2eb0300e8c76
https://doi.org/10.1088/0964-1726/1/3/009
https://doi.org/10.1088/0964-1726/1/3/009
Publikováno v:
Journal of Lightwave Technology. 10:1499-1506
A surface acoustic wave sensor based on an in-line extrinsic Fizeau interferometer is described. A single-mode fiber, used as the input/output fiber, and a multimode fiber, used solely as a reflector, form an air-gap that acts as a low-finesse Fabry-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e45c02e20653d1d9e25fef384a345e8
https://doi.org/10.1109/50.166795
https://doi.org/10.1109/50.166795
Publikováno v:
Journal of Lightwave Technology. 10:1680-1687
Spatially weighted optical fiber sensors that filter specific vibration modes from one-dimensional beams placed in clamped-free and clamped-clamped configurations are presented. The sensitivity of the sensors is varied along the length of the fiber b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::739eeb1dd670ab0a0ec7782e3b4ee152
https://doi.org/10.1109/50.184908
https://doi.org/10.1109/50.184908
Autor:
J. B. Judkins, C. R. Davidson, J. Renee Pedrazzani, Neal S. Bergano, Ashish Madhukar Vengsarkar, Paul Joseph Lemaire
Publikováno v:
Optics letters. 21(5)
Long-period fiber gratings are used to flatten the gain spectrum of erbium-doped fiber amplifiers. A broadband amplifier with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4afb6f61437c20b4499d20661f867baa
https://pubmed.ncbi.nlm.nih.gov/19865397
https://pubmed.ncbi.nlm.nih.gov/19865397
Autor:
Ashish Madhukar Vengsarkar, S. G. Kosinski, Qian Zhong, Paul Joseph Lemaire, W. A. Reed, Daryl Inniss
Publikováno v:
Optics letters. 19(16)
An in situ birefringence measurement in conjunction with an atomic force microscope study shows that the geometric asymmetry of the side-writing process is a major cause of the induced birefringence in grating-based fiber devices. Measured refractive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5d16deb5bf9829175f85b9695add31a
https://pubmed.ncbi.nlm.nih.gov/19855489
https://pubmed.ncbi.nlm.nih.gov/19855489
Autor:
W. A. Reed, Ashish Madhukar Vengsarkar
Publikováno v:
Optics letters. 18(11)
Single-mode dispersion compensating fiber designs with absolute dispersion values of greater than 100 ps/(nm km) are described. A multiclad fiber with a triangular refractive-index profile in the core gives a dispersion of −250 ps/(nm km), resultin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42aa77e536d37ed5f762300adc674f12
https://pubmed.ncbi.nlm.nih.gov/19802317
https://pubmed.ncbi.nlm.nih.gov/19802317
Publikováno v:
Optics letters. 17(18)
We present a selective mode-launching technique to determine the confinement of erbium in optical fibers. The loss per meter, alpha(lm), of the individual LP(lm) modes (LP(01) and LP(11) at 980 nm) is measured, and the ratio gamma = alpha(01)/alpha(1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4c37ffb61582ccc2b9ab8a2f3480286
https://pubmed.ncbi.nlm.nih.gov/19798156
https://pubmed.ncbi.nlm.nih.gov/19798156
Publikováno v:
Optics letters. 17(23)
We present a theoretical analysis of highly elliptical optical fibers by expanding the vector fields as a series of orthogonal functions. Higher-order cutoff values of the normalized frequencies (V numbers) are evaluated for step-index fibers of vary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9000cb0f3f65aaf5c77dbce44d0094ef
https://pubmed.ncbi.nlm.nih.gov/19798275
https://pubmed.ncbi.nlm.nih.gov/19798275
Publikováno v:
Journal of Lightwave Technology. 8:1688-1696
Experimental methods for the practical implementation of few-mode elliptical-core sensors are described. Techniques for desensitizing the lead-in and lead-out fibers are discussed, and results of a vibration sensor embedded in a graphite-epoxy compos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a49b2c369abfb037aa6b9aaea7f870ba
https://doi.org/10.1109/50.60567
https://doi.org/10.1109/50.60567