Zobrazeno 1 - 10
of 43
pro vyhledávání: '"J. S. Uppal"'
Publikováno v:
Nonlinear Dynamics and Spatial Complexity in Optical Systems ISBN: 9781351075046
When an atomic system interacts with light, it can amplify the electromagnetic radiation when gain exceeds loss. This requires that transitions from the upper level to the lower level prevail over the transitions from the lower level to the upper lev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70c745d7526844ee37a68f39a08839da
https://doi.org/10.1201/9781351075046-11
https://doi.org/10.1201/9781351075046-11
Publikováno v:
Applied optics. 28(13)
Macroscopic control of the cavity length is required, in addition to the PZT control, to obtain uniform intensity output on several rotational lines from a hybrid CO(2) laser.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca870461e0fd4b45473247f60874c3d0
https://pubmed.ncbi.nlm.nih.gov/20555542
https://pubmed.ncbi.nlm.nih.gov/20555542
Autor:
J. S. Uppal, Robert G. Harrison
Publikováno v:
Applied optics. 28(8)
A simple method for the generation of a Gaussian reflectivity mirror by using an absorbing lens is reported. The efficiency of an unstable resonator using such a Gaussian mirror as the output coupler has been analyzed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90b9818d601fb8d3687e5d9aae7042b1
https://pubmed.ncbi.nlm.nih.gov/20548679
https://pubmed.ncbi.nlm.nih.gov/20548679
Publikováno v:
Journal of Modern Optics. 37:605-611
A resonantly pumped three-level laser is analysed in a high-Q cavity under conditions of negligible and high pump depletion to obtain expressions for the emission characteristics in analytic form. Under high pump depletion our analysis predicts bista
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::785cbca7fef0180e7ec9bab92fb2bd9a
https://doi.org/10.1080/09500349014550691
https://doi.org/10.1080/09500349014550691
Publikováno v:
Optical and Quantum Electronics. 22:89-94
The use of cavity length control to obtain multiline emission from a hybrid CO2 laser has been investigated. We have obtained simultaneous laser oscillation on up to four lines in the P and R branches of the 10 μm band by operating the c.w. section
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::269ab5960f99de2941d5ff40ea1ad4be
https://doi.org/10.1007/bf02189715
https://doi.org/10.1007/bf02189715
Autor:
Robert G. Harrison, J. S. Uppal
Publikováno v:
IEEE Journal of Quantum Electronics. 26:329-336
Interaction of two coherent fields with a homogeneously broadened three-level system is discussed for both a laser amplifier and laser oscillator under weak field emission. Analytic expressions are obtained to study explicitly the dependence of the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8463412512e60874481adc6e47c308e
https://doi.org/10.1109/3.44966
https://doi.org/10.1109/3.44966
Publikováno v:
Optics Communications. 74:393-397
A resonantly pumped three level laser system has been analysed including pump depletion where it is shown that under appropriate conditions of pumping, the output emission results in a bistable action in their steady state behaviour. A combined actio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6540ea57346a5d80d0510b1bf16e07ea
https://doi.org/10.1016/0030-4018(90)90225-i
https://doi.org/10.1016/0030-4018(90)90225-i
Publikováno v:
Optics Communications. 81:222-224
Stimulated Brillouin scattering under cw pumping in the presence of low reflectivity feedback is shown to exhibit huge sustained or random bursts of quasi-periodic emission with an underlying weak chaotic behaviour imposed on a dc background. Theoret
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3ccfcdb3d47703ef001a6fb0a30518a
https://doi.org/10.1016/0030-4018(91)90642-q
https://doi.org/10.1016/0030-4018(91)90642-q
Publikováno v:
Recent Developments in Quantum Optics ISBN: 9780306444036
Pulsating instabilities and deterministic chaos are known to be common features of many nonlinear processes. These implications are being strongly felt in a broad range of physical sciences. Lasers, in particular, have been found to exhibit a rich va
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb6f4f84588a4e8c9b2e2592840ab5f7
https://doi.org/10.1007/978-1-4615-2936-1_54
https://doi.org/10.1007/978-1-4615-2936-1_54
Publikováno v:
SPIE Proceedings.
The results of a theoretical and experimental investigation of the steady state and dynamical unstable behaviour of a single-mode homogeneously broadened Raman laser is presented. Bistable features of the Raman emission and its operating conditions a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a2c18f8f2d872c23484179ecd3513c8
https://doi.org/10.1117/12.48062
https://doi.org/10.1117/12.48062