A K Kar
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Explore the profile of A K Kar including associated specialties, affiliations and a list of published articles.
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Articles
67
Citations
97
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Recent Articles
1.
Bhattacharjee R, Kar A
Morphologie
. 2023 Oct;
108(360):100701.
PMID: 37890284
In every criminal inquiry, identification is of utmost importance. Cheiloscopy is a technique used in forensic investigation that focuses on identifying people from their lip prints. Just like fingerprints, each...
2.
Morris J, Stevenson N, Bookey H, Kar A, Brown C, Hopkins J, et al.
Opt Express
. 2017 Aug;
25(13):14910-14917.
PMID: 28789073
The ultrafast laser inscription technique has been used to fabricate channel waveguides in Tm-doped LuO ceramic gain medium for the first time to our knowledge. Laser operation has been demonstrated...
3.
del Rosal B, Sun C, Yan Y, MacKenzie M, Lu C, Bettiol A, et al.
Opt Express
. 2014 Oct;
22(20):23938-54.
PMID: 25321971
Flow effects on the thermal loading in different optofluidic systems (optical trap and various microfluidic channels) have been systematically explored by using dye-based ratiometric luminescence thermometry. Thermal images obtained by...
4.
Mary R, Beecher S, Brown G, Thomson R, Jaque D, OHara S, et al.
Opt Lett
. 2012 May;
37(10):1691-3.
PMID: 22627539
Laser slope efficiencies close to the quantum defect limit and in excess of 78% have been obtained from an ultrafast laser inscribed buried channel waveguide fabricated in a ytterbium-doped bismuthate...
5.
Beecher S, Thomson R, Reid D, Psaila N, Ebrahim-Zadeh M, Kar A
Opt Lett
. 2011 Dec;
36(23):4548-50.
PMID: 22139238
A novel technique was used to control the spatial overlap of the orthogonal linearly polarized waveguide modes in ultrafast laser inscribed BiB(3)O(6) waveguides. We report that the strain fields induced...
6.
Rodenas A, Benayas A, Macdonald J, Zhang J, Tang D, Jaque D, et al.
Opt Lett
. 2011 Sep;
36(17):3395-7.
PMID: 21886222
A new (to our knowledge) ultrashort laser pulse irradiation regime that allows us to directly modify and increase the refractive index of rare earth doped YAG polycrystalline ceramics has been...
7.
Li H, Kar A, Parker T, Wang G, Lu T
Nanotechnology
. 2011 Jul;
19(33):335708.
PMID: 21730634
We report the creation of unusual biaxial textures in Cu nanorod films, through the control of the incident vapor flux during oblique angle deposition. High-density twin boundaries were formed using...
8.
Fusari F, Thomson R, Jose G, Bain F, Lagatsky A, Psaila N, et al.
Opt Lett
. 2011 May;
36(9):1566-8.
PMID: 21540929
We report optical guiding and laser action at around 1.9 μm in a Tm³⁺-doped fluorogermanate glass waveguide fabricated using ultrafast laser inscription. A monolithic laser cavity was constructed by directly...
9.
Thomson R, Birks T, Leon-Saval S, Kar A, Bland-Hawthorn J
Opt Express
. 2011 Mar;
19(6):5698-705.
PMID: 21445210
We used ultrafast laser inscription to fabricate three-dimensional integrated optical transitions that efficiently couple light from a multimode waveguide to a two-dimensional array of single mode waveguides and back. Although...
10.
Macdonald J, Thomson R, Beecher S, Psaila N, Bookey H, Kar A
Opt Lett
. 2010 Dec;
35(23):4036-8.
PMID: 21124604
We report the successful fabrication of a low-loss near-IR waveguide in polycrystalline ZnSe using ultrafast laser inscription. The waveguide, which was inscribed using the multiscan fabrication technique, supported a well-confined...