scholarly journals Two-photon absorption effects on Raman gain in single mode As_2Se_3 chalcogenide glass fiber

2008 ◽  
Vol 16 (22) ◽  
pp. 18524 ◽  
Author(s):  
A. Tuniz ◽  
G. Brawley ◽  
D. J. Moss ◽  
B. J. Eggleton
Keyword(s):  
Glass Fiber ◽  
Chalcogenide Glass ◽  
Single Mode ◽  
Photon Absorption ◽  
Raman Gain ◽  
Two Photon Absorption ◽  
Two Photon

Two-Photon Absorption Light-Induced Self-Written Waveguide for Single-Mode Optical Interconnection

2018 ◽  
Vol 36 (12) ◽  
pp. 2478-2483 ◽  
Author(s):  
Freddy Tan ◽  
Hidetaka Terasawa ◽  
Okihiro Sugihara ◽  
Akari Kawasaki ◽  
Tatsuya Yamashita ◽  
...  
Keyword(s):  
Single Mode ◽  
Photon Absorption ◽  
Optical Interconnection ◽  
Two Photon Absorption ◽  
Two Photon

THEORY OF TWO-PHOTON ABSORPTION

1967 ◽  
Vol 45 (8) ◽  
pp. 2513-2524 ◽  
Author(s):  
R. Guccione-Gush ◽  
H. P. Gush ◽  
J. Van Kranendonk
Keyword(s):  
Transition Probability ◽  
Single Mode ◽  
Multipole Expansion ◽  
Photon Absorption ◽  
Matrix Formalism ◽  
Stationary Field ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Density Matrix Formalism ◽  
Simple Evaluation

The two-photon absorption process is discussed using a density matrix formalism. The electromagnetic field is described by means of coherent states, a technique that permits a simple evaluation of the effect of coherence on the transition probability. It is concluded that the latter is the same for a coherent and an incoherent pulse of radiation. In the case of a stationary field containing many modes, the transition probability is nearly the same in the coherent and incoherent cases, whereas for a single mode the transition probability is twice as high for the incoherent field. These conclusions are independent of the multipole expansion of the interaction Hamiltonian and are valid for electric dipole and higher multipole transitions.

scholarly journals Measurement of two-photon absorption by gold nanoparticles of different sizes photodeposited onto the core of an optical fibre

2021 ◽  
Vol 61 (1) ◽  
Author(s):  
J.M. Cuvas-Limón ◽  
J.G. Ortega-Mendoza ◽  
J.P. Padilla-Martínez ◽  
P. Zaca-Morán
Keyword(s):  
Gold Nanoparticles ◽  
Optical Fibre ◽  
Continuous Wave ◽  
Nonlinear Coefficient ◽  
Single Mode ◽  
High Gain ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
The Core

In this work, the study of two-photon absorption by gold nanoparticles of different diameters photodeposited onto the core of a single-mode optical fibre is presented. The photodeposition of nanoparticles with diameters of 10, 20, 50 and 100 nm was achieved using a continuous wave laser at a wavelength of 1550 nm and a power of 50 mW. Nonlinear optical characterization was carried out by using the P-scan technique of a high gain erbium doped fibre amplifier with pulses of 20 ns at a frequency of 10 kHz, that provides a maximum intensity of approximately 60 MW/cm2. The results show that for gold nanoparticles greater than 20 nm photodeposited onto the fibre, in both cases, the nonlinear coefficient as well as the third-order susceptibility increase as the diameter of the nanoparticles increases, describing a typical behaviour of the two-photon absorption. The obtained results can be used for the design of filters and optical limiters in the communications area.

Two-photon Absorption Process in Germano-silica Glass Fiber Doped with PbSe Quantum-dots

2011 ◽  
Author(s):  
Pramod R. Watekar ◽  
Seongmin Ju ◽  
Aoxiang Lin ◽  
Won-Taek Han ◽  
Jisoon Ihm ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Glass Fiber ◽  
Silica Glass ◽  
Photon Absorption ◽  
Absorption Process ◽  
Two Photon Absorption ◽  
Two Photon
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