Pulse Energy Dependence of Defect Generation in Bragg Grating Optical Fiber Materials

1991 ◽  
Vol 244 ◽  
Author(s):  
T. E. Tsai ◽  
C. G. Askins ◽  
E. J. Friebele
Keyword(s):  
Second Harmonic ◽  
Photon Absorption ◽  
Bragg Grating ◽  
Paramagnetic Centers ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Low Intensity ◽  
Defect Centers ◽  
Spin Resonance ◽  
Fiber Materials

ABSTRACTGe-associated defect centers induced by 5 eV (∼ 245 nm) photons of various intensities in Ge-doped silica were studied using electron spin resonance (ESR). We found that Ge E' centers observed in Bragg grating Ge-doped silica core fibers are induced and bleached by one- and two-photon absorption processes, respectively. The observation that Ge E's are the only paramagnetic centers induced by low intensity 5 eV photons supports the proposal that the Ge E' center is responsible for the photoinduced structures observed in both Bragg grating and second-harmonic-generation (SHG) fibers.

OPTICAL NONLINEARITY VIA PHONONS AS AN INTERMEDIARY

2001 ◽  
Vol 10 (01) ◽  
pp. 65-77 ◽  
Author(s):  
OU FA ◽  
HE MINGGAO ◽  
WU FUGEN
Keyword(s):  
Second Harmonic ◽  
Optical Nonlinearity ◽  
Photon Absorption ◽  
Saturation Phenomenon ◽  
Sum Frequency ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Threshold Phenomenon ◽  
Anti Stokes ◽  
The Given

A new model to describe the origin of optical nonlinearity is presented. In this model, the interaction between light and medium is reduced to the coupling of photons with phonons, which occurs in the crystal lattice vibrating anharmonically. Then the optical nonlinearity originates from the nonlinear photon–phonon coupling or the interaction among phonons themselves. In this paper, more attention is drawn to the latter. By the given model, (1) degenerate and (2) nondegenerate parametric oscillations, (3) Stokes and (4) anti-Stokes Raman scattering, (5) sum-frequency and (6) second harmonic generation and (7) two-photon absorption are dealt with systematically and quantum-mechanically. The results of theoretical analysis show that the effects (1)–(4) are associated with threshold phenomenon, whereas the effects (5)–(7) with the saturation phenomenon.

scholarly journals Two-photon based pulse autocorrelation with CdSe nanoplatelets

Nanoscale ◽  
2019 ◽  
Vol 11 (37) ◽  
pp. 17293-17300 ◽  
Author(s):  
Michael T. Quick ◽  
Nina Owschimikow ◽  
Ali Hossain Khan ◽  
Anatolii Polovitsyn ◽  
Iwan Moreels ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

We investigate broadband two-photon absorption autocorrelators based on II–VI semiconductor nanoplatelets as an alternative to common second harmonic generation based techniques.

Two-photon absorption-induced self-phase modulation in GaAs–AlGaAs waveguides for surface-emitted second-harmonic generation

1999 ◽  
Vol 24 (11) ◽  
pp. 756 ◽  
Author(s):  
Todd G. Ulmer ◽  
Ronson K. Tan ◽  
Zhiping Zhou ◽  
Stephen E. Ralph ◽  
Richard P. Kenan ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Phase Modulation ◽  
Second Harmonic ◽  
Photon Absorption ◽  
Self Phase Modulation ◽  
Two Photon Absorption ◽  
Two Photon

One- and two-photon absorption properties of diamond nitrogen-vacancy defect centers: A theoretical study

2008 ◽  
Vol 129 (12) ◽  
pp. 124714 ◽  
Author(s):  
Chih-Kai Lin ◽  
Yi-Hsieh Wang ◽  
Huan-Cheng Chang ◽  
M. Hayashi ◽  
S. H. Lin
Keyword(s):  
Theoretical Study ◽  
Vacancy Defect ◽  
Nitrogen Vacancy ◽  
Photon Absorption ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Defect Centers
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