Zobrazeno 1 - 10
of 347
pro vyhledávání: '"Popa, D. P."'
Autor:
Trebuian CI, Popa D, Buleu F, Sutoi D, Williams CG, Crintea IN, Chioibas RD, Iancu A, Ciolac L, Mederle OA
Publikováno v:
International Journal of General Medicine, Vol Volume 17, Pp 3337-3347 (2024)
Cosmin Iosif Trebuian,1,2 Daian Popa,3,4 Florina Buleu,5,6 Dumitru Sutoi,1,5 Carmen Gabriela Williams,3 Iulia Najette Crintea,1,3 Raul Daniel Chioibas,1 Aida Iancu,7 Livia Ciolac,8 Ovidiu Alexandru Mederle1,3 1Department of Surgery I, “victor Babes
Externí odkaz:
https://doaj.org/article/e185ec35b3474bfd9a8c6643dac6444e
Publikováno v:
Appl. Phys. Lett. 113, 193102 (2018)
We report soliton rains in a tuneable Tm-doped fiber laser mode locked by carbon nanotubes. We also detect their second- and third-harmonic. We achieve a tuneability of over 56nm, from 1877 to 1933nm, by introducing a polarization-maintaining isolato
Externí odkaz:
http://arxiv.org/abs/1807.02722
Autor:
Woodward, R. I., Kelleher, E. J. R., Popa, D., Hasan, T., Bonaccorso, F., Ferrari, A. C., Popov, S. V., Taylor, J. R.
Publikováno v:
IEEE Photon, Tech. Lett. 26, 1672-1675 (2014)
We report an environmentally stable nanotube mode-locked fibre laser producing linearly-polarized, nanosecond pulses. A simple all-polarization-maintaining fibre ring cavity is used, including 300 m of highly nonlinear fibre to elongate the cavity an
Externí odkaz:
http://arxiv.org/abs/1805.02690
Autor:
Purdie, D., Popa, D., Wittwer, V. J., Jiang, Z., Bonacchini, G., Torrisi, F., Milana, S., Lidorikis, E., Ferrari, A. C.
Publikováno v:
Appl. Phys. Lett. 106, 253101 (2015)
We combine a graphene mode-locked oscillator with an external compressor and achieve~29fs pulses with~52mW average power. This is a simple, low-cost, and robust setup, entirely fiber based, with no free-space optics, for applications requiring high t
Externí odkaz:
http://arxiv.org/abs/1504.01682
Autor:
Zaugg, C. A., Sun, Z., Wittwer, V. J., Popa, D., Milana, S., Kulmala, T., Sundaram, R. S., Mangold, M., Sieber, O. D., Golling, M., Lee, Y., Ahn, J. H., Ferrari, A. C., Keller, U.
Publikováno v:
Optics Expr. 21, 31548 (2013)
We report a versatile and cost-effective way of controlling the unsaturated loss, modulation depth and saturation fluence of graphene-based saturable absorbers (GSAs), by changing the thickness of a spacer between SLG and a high-reflection mirror. Th
Externí odkaz:
http://arxiv.org/abs/1310.2132
Autor:
Mary, R., Beecher, S. J., Brown, G., Torrisi, F., Milana, S., Popa, D., Hasan, T., Sun, Z., Lidorikis, E., Ohara, S., Ferrari, A. C., Kar, A. K.
Publikováno v:
Optics Express 21, 7943 (2013)
We fabricate a saturable absorber mirror by coating a graphene film on an output coupler mirror. This is then used to obtain Q-switched mode-locking from a diode pumped linear cavity waveguide laser inscribed in Ytterbium-doped Bismuthate Glass, with
Externí odkaz:
http://arxiv.org/abs/1212.3401
Autor:
Zhang, M., Kelleher, E. J. R., Torrisi, F., Sun, Z., Hasan, T., Popa, D., Wang, F., Ferrari, A. C., Popov, S. V., Taylor, J. R.
Publikováno v:
Optics Express 20, 25077 (2012)
We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94\mu m, using a graphene-based saturable absorber. The laser outputs 3.6ps pulses, with~0.4nJ energy and an amplitude fluctuation~0.5%, at 6.46MHz. This is a simple, low-cost,
Externí odkaz:
http://arxiv.org/abs/1208.1804
Publikováno v:
Appl. Phys. Lett. 98, 073106 (2011)
We demonstrate a wideband-tunable Q-switched fiber laser exploiting a graphene saturable absorber. We get ~2us pulses, tunable between 1522 and 1555nm with up to~40nJ energy. This is a simple and low-cost light source for metrology, environmental sen
Externí odkaz:
http://arxiv.org/abs/1011.0115
Publikováno v:
Appl. Phys. Lett. 97, 203106 (2010)
Ultrafast fiber lasers with short pulses and broad bandwidth are in great demand for a variety of applications, such as spectroscopy, biomedical diagnosis and optical communications. In particular sub-200fs pulses are required for ultrafast spectrosc
Externí odkaz:
http://arxiv.org/abs/1010.1329
Autor:
Sun, Z., Popa, D., Hasan, T., Torrisi, F., Wang, F., Kelleher, E. J. R., Travers, J. C., Ferrari, A. C.
Publikováno v:
Nano Research 3, 653 (2010)
We report a tunable ultrafast fiber laser mode-locked with a graphene saturable absorber. The linear dispersions of the Dirac electrons in graphene enable wideband tunability. We get ~1ps pulses, tunable between 1525 and 1559nm, demonstrating graphen
Externí odkaz:
http://arxiv.org/abs/1003.4714