Characterization of off-axis superposition of partially coherent beams

Li, Binzhong; Lü, Baida

doi:10.1088/1464-4258/5/4/301

Cited by 29 publications

(8 citation statements)

References 6 publications

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“…Taking the GSM beam as a typical example of partially coherent beams, the closed-form expressions for the CSD and intensity of resulting beam for the coherent and incoherent combinations of partially coherent beams beyond the paraxial approximation have been derived and some interesting special cases have been analyzed. In comparison with the previous publications concerning the combination of partially coherent beams [15][16][17][18], the two combination schemes, i.e., the coherent and incoherent combinations of partially coherent nonparaxial beams has been considered, compared, and illustrated by numerical examples. We have used the terminology of coherent and incoherent combinations of partially coherent beams because, on the one hand, for the combination scheme described by Eq.…”

Section: Discussionmentioning

confidence: 99%

Coherent and incoherent combinations of partially coherent beams beyond the paraxial approximation

Lü

2010

Optics & Laser Technology

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Section: Discussionmentioning

confidence: 99%

Coherent and incoherent combinations of partially coherent beams beyond the paraxial approximation

Lü

2010

Optics & Laser Technology

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“…This is not encountered in other systems, which are also subjected to a significant polymerization shrinkage and which exhibit the same type of morphology, such as epoxy-based blends. 15,16 In these later systems, gel conversion is clearly higher and shrinkage after gelation is not large enough to induce microvoids.…”

Section: Evolution Of Morphology Upon Curing Observed With Optical MImentioning

confidence: 96%

Reaction‐induced phase separation in poly(vinyl acetate)/polyester blend

Bulliard¹,

Michaud²,

Månson³

2006

J of Applied Polymer Sci

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In blends of unsaturated polyester (UP), poly (vinyl acetate) (PVAc), and styrene, a reaction-induced phase separation occurs upon curing that is due to the crosslinking between styrene and the UP molecules. The evolution of the morphology was observed by optical microscopy on a heated stage. Light transmission was used in parallel to precisely detect the onset of phase separation and the formation of microvoids. Using Fourier transform IR spectroscopy in the same conditions, the conversions at phase separation and at microvoiding were evaluated. Phase separation occurs at a very low degree of conversion and microvoiding develops at around 60% of conversion. The final morphology of the blend was investigated by scanning electron microscopy. The relative influences of the cure temperature, the concentration in PVAc, and the molecular weight of PVAc were investigated. It was confirmed that the early stages of the reaction at high temperature determine the final morphology of the blends.

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“…The laser propagates along the z-axis in the Cartesian coordinate system. The cross-spectral density of the whole beam array at the source plane can be written as [14,16] Wðx;y;n;g;z ¼ 0Þ ¼ hEðx;y;z ¼ 0ÞE Ã ðn;g;z ¼ 0Þi…”

Section: Analysis Of Theorymentioning

confidence: 99%

“…So in practical engineering, the high power laser array can be better modeled by a partially coherent and partially phase-locked laser array. To date, the propagation properties of various kinds of phase-locked beam array have been studied in detail [11][12][13][14][15][16][17][18][19][20]. Nevertheless, to the best of our knowledge, the propagation of partially coherent partially phase-locked laser array in turbulent atmosphere has not yet been investigated.…”

Section: Introductionmentioning

confidence: 99%