Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Ojas P. Kulkarni"'
Publikováno v:
Journal of Clinical and Diagnostic Research, Vol 16, Iss 10, Pp WD01-WD03 (2022)
Trichoscopy is a non invasive tool useful for diagnosis of dermatoses on hair bearing skin. Alopecia Areata (AA) is a common non scarring alopecia with varying aetiologies including autoimmune and genetic factors. Trichotillomania (TTM) is a psychoc
Externí odkaz:
https://doaj.org/article/89a47d6c345b47dfa51dd5a924188a8d
Publikováno v:
Indian Journal of Dermatology, Vol 67, Iss 4, Pp 450-451 (2022)
Externí odkaz:
https://doaj.org/article/c955c04596714aa0b214601384051adc
Autor:
Manickam Neelakandan, Allan Chan, Vinay V. Alexander, Malay Kumar, Fred L. Terry, Chenan Xia, Ojas P. Kulkarni, Michael J. Freeman, Kevin Ke, Michael J. Welsh, Mohammed N. Islam
Publikováno v:
Optical Fiber Technology. 18:349-374
High average power, all-fiber integrated, broadband supercontinuum (SC) sources are demonstrated. Architecture for SC generation using amplified picosecond/nanosecond laser diode (LD) pulses followed by modulation instability (MI) induced pulse break
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9070a6a4057a4d9efb6104882cabc996
https://doi.org/10.1016/j.yofte.2012.07.014
https://doi.org/10.1016/j.yofte.2012.07.014
Autor:
Almantas Galvanauskas, Malay Kumar, William A. Wood, Ming Yuan Cheng, Mohammed N. Islam, Fred L. Terry, D.A. Nolan, Ojas P. Kulkarni, Chenan Xia, Michael J. Freeman
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 13:789-797
Supercontinuum (SC) with a continuous spectrum from ~0.8-3 mum is generated in a standard single-mode fiber followed by high-nonlinearity fiber. The SC is pumped by 2-ns laser diode (LD) pulses amplified in a multistage fiber amplifier, and the two o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ba14a9466ad12caf258b79af6b3a6d0
https://doi.org/10.1109/jstqe.2007.897414
https://doi.org/10.1109/jstqe.2007.897414
Publikováno v:
Optics express. 19(5)
A GaAs-based surface-normal optical modulator using the free-carrier effect is demonstrated for the first time to our knowledge. The device exhibits ~43% modulation depth compared to 24% for a previously demonstrated Si-based device with twice the in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69e846d4229d13c4b81a08de03df3db7
https://pubmed.ncbi.nlm.nih.gov/21369236
https://pubmed.ncbi.nlm.nih.gov/21369236
Autor:
Ojas P. Kulkarni, Malay Kumar, Michael J. Freeman, Fred L. Terry, Mohammed N. Islam, Vinay V. Alexander
Publikováno v:
CLEO:2011 - Laser Applications to Photonic Applications.
We demonstrate supercontinuum generation beyond 4.5 μm by first shifting 1.55 μm laser-diode pulses to ∼2 μm in standard single-mode fiber followed by amplification using Tm-doped amplifier and subsequent coupling to ∼7 m ZBLAN fiber.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::488064f85034cb522cf63cac9fecab00
https://doi.org/10.1364/cleo_si.2011.cthd2
https://doi.org/10.1364/cleo_si.2011.cthd2
Publikováno v:
Conference on Lasers and Electro-Optics 2010.
We inspect inner surfaces of valve body spool bores down to 5 mm diameter for porosity defects, using an optical probe with ∼50 µm lateral resolution. The probe can also distinguish porosity from bump-type defects.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c03f54f6e12c059805c5524122b843c7
https://doi.org/10.1364/cleo_apps.2010.afa2
https://doi.org/10.1364/cleo_apps.2010.afa2
Autor:
Chenan Xia, Amos Kuditcher, Mohammed N. Islam, Bruce G. Aitken, Mark L. Powley, Malay Kumar, Stephen Charles Currie, Michael J. Freeman, Ojas P. Kulkarni, Dong-Joon Lee, Fred L. Terry, Daniel A. Nolan, Joseph Edward McCarthy
Publikováno v:
Optics express. 14(17)
Cascaded Raman wavelength shifting up to three orders from 1553 nm to 1867 nm is demonstrated in As(2)S(3)-chalcogenide fibers. Due to a long zero dispersion wavelength for the sulfide fiber (4.5 mum), pumping the fiber at 1553 nm results in generati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b4a9fd098199f971c5e612991b15544
https://pubmed.ncbi.nlm.nih.gov/19529161
https://pubmed.ncbi.nlm.nih.gov/19529161
Publikováno v:
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference.
We demonstrate a surface-normal modulator based on free-carrier effect in GaAs and phase-to-amplitude conversion coupling to a single mode fiber. Operation over 1200–2400nm, modulation depth up to 43% and frequency up to 270MHz is observed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3373361bcf8358ed15ba2b7da8adae4
https://doi.org/10.1364/cleo.2009.jwa42
https://doi.org/10.1364/cleo.2009.jwa42
Autor:
Marcel Poulain, Fred L. Terry, Michael J. Freeman, Gwenael Maze, Chenan Xia, Ojas P. Kulkarni, Mohammed N. Islam, Malay Kumar
Publikováno v:
Optics Letters
Optics Letters, Optical Society of America-OSA Publishing, 2006, 31 (17), pp.2553-5. ⟨10.1364/OL.31.002553⟩
Optics Letters, 2006, 31 (17), pp.2553-5. ⟨10.1364/OL.31.002553⟩
Optics Letters, Optical Society of America-OSA Publishing, 2006, 31 (17), pp.2553-5. ⟨10.1364/OL.31.002553⟩
Optics Letters, 2006, 31 (17), pp.2553-5. ⟨10.1364/OL.31.002553⟩
International audience; A mid-infrared supercontinuum (SC) is generated in ZBLAN (ZrF4-BaF2-LaF3-AlF3-NaF...) fluoride fibers from amplified nanosecond laser diode pulses with a continuous spectrum from approximately 0.8 microm to beyond 4.5 microm.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b6412f832c3ec5406b5465c1294ed0c
https://hal.archives-ouvertes.fr/hal-00868240
https://hal.archives-ouvertes.fr/hal-00868240
