Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Usha Chakravarty"'
Autor:
Usha Chakravarty, Avdhesh Kumar, Antony Kuruvilla, Aswin Asok, R.K. Jain, Rajpal Singh, Blacius Ekka, B.N. Upadhyaya, K.S. Bindra
Publikováno v:
Optics & Laser Technology. 164:109452
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8f44e984f66e04e486ec83d7ce97827
https://doi.org/10.1016/j.optlastec.2023.109452
https://doi.org/10.1016/j.optlastec.2023.109452
Autor:
P. A. Naik, Manoranjan P. Singh, Juzer Ali Chakera, V. Arora, Parshotam Dass Gupta, Usha Chakravarty
Publikováno v:
Pramana. 82:365-371
Spectral analysis of K-shell X-ray emission of magnesium plasma, produced by laser pulses of 45 fs duration, focussed up to an intensity of ∼1018 W cm−2, is carried out. The plasma conditions prevalent during the emission of X-ray spectrum were i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93ebb08309606d6164be803279c57cee
https://doi.org/10.1007/s12043-014-0691-z
https://doi.org/10.1007/s12043-014-0691-z
Publikováno v:
Pramana. 82:379-383
In this paper we report linearly polarized high average power passive Q-switched ytterbium-doped photonic crystal fibre laser with a Cr4+:YAG crystal as a saturable absorber. An average output power of 9.4 W with pulse duration of 64 ns and pulse rep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f5f7360172d268aae69a78f7d681ab7
https://doi.org/10.1007/s12043-014-0695-8
https://doi.org/10.1007/s12043-014-0695-8
Publikováno v:
Optics & Laser Technology. 51:82-89
In this paper, we present the experimental and analytical study of self-pulsing dynamics in Yb-doped photonic crystal fiber laser in single-end and double-end pumping configurations. It has been found that the intensity of self-pulses is considerably
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2cc80afa25c0961433ec2c1e2355f5e
https://doi.org/10.1016/j.optlastec.2013.03.011
https://doi.org/10.1016/j.optlastec.2013.03.011
Publikováno v:
Pramana. 79:443-456
The electric field enhancement inside a nanotube irradiated by intense ultrashort laser pulse (≪1 ps) is calculated. The hollowness of the nanotubes determines the field enhancement and the electron density at which such structures exhibit resonanc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80c0bc2fa5a6639e2957e8f8990d88a2
https://doi.org/10.1007/s12043-012-0340-3
https://doi.org/10.1007/s12043-012-0340-3
Publikováno v:
IEEE Journal of Quantum Electronics. 47:786-794
Characteristics of the output pulses of a high-peak-power Q-switched Yb-doped fiber laser are presented. A Q-switched fiber laser with 1.3 kW peak power and with typical pulse duration of 240 ns at 20 kHz modulation frequency was realized, variations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db5d7ba85176c1e6236f9204a7b358be
https://doi.org/10.1109/jqe.2011.2114639
https://doi.org/10.1109/jqe.2011.2114639
Publikováno v:
Optics Communications. 283:2206-2213
We present an experimental study of self-pulsing characteristics of a high-power single transverse mode Yb-doped double-clad continuous wave (CW) fiber laser. The self-pulsing features under high-power single-end pumping and double-end pumping config
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::192dfaabffb7ea36e2954886315a880d
https://doi.org/10.1016/j.optcom.2010.01.038
https://doi.org/10.1016/j.optcom.2010.01.038
Autor:
M. R. Shenoy, A. Kuruvilla, Krishna Thyagarajan, B.N. Upadhyaya, Ashish Kumar Nath, Usha Chakravarty
Publikováno v:
Optics Communications. 281:146-153
Fiber laser resonator configurations have been analyzed theoretically on the basis of steady-state rate equations to optimize the laser conversion efficiency. Evolution of the pump- and signal powers and the saturated gain coefficient along the lengt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f298d6d951d59d2f2949c02770aa716
https://doi.org/10.1016/j.optcom.2007.09.004
https://doi.org/10.1016/j.optcom.2007.09.004
Autor:
P. A. Naik, S. R. Kumbhare, Usha Chakravarty, R. A. Khan, Rashid A. Ganeev, R. P. Kushwaha, M. Raghuramaiah, Parshotam Dass Gupta, V. Arora, H. Singhal, Juzer Ali Chakera
Publikováno v:
Optics and Spectroscopy. 103:831-838
The results of investigation of the higher harmonics (from the 21st to the 61st order) of radiation of a femtosecond laser (793 nm, 48 fs) that are generated in silver plasma are presented. The changes in the shape and spectra of harmonics for differ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afba20a5d67dc84f981e7797fb1d78f3
https://doi.org/10.1134/s0030400x07110252
https://doi.org/10.1134/s0030400x07110252
Autor:
Usha Chakravarty, Rashid A. Ganeev, R. P. Kushwaha, M. Raghuramaiah, Parshotam Dass Gupta, Juzer Ali Chakera, R. A. Khan, S. R. Kumbhare, P. A. Naik, V. Arora, H. Singhal
Publikováno v:
Optics and Spectroscopy. 102:949-959
A significant increase, as well as a decrease, in the intensity of single higher harmonics of femtosecond radiation of a Ti:sapphire laser that are generated in a weakly excited laser plasma on the surface of GaAs, Cr, InSb, In, and stainless steel i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::baf89b8961a916515b0242a50e2a0fa3
https://doi.org/10.1134/s0030400x07060239
https://doi.org/10.1134/s0030400x07060239