Patent
Method and device for acquiring Bessel beam based on cross phase modulation
Reads0
Chats0
TLDR
In this paper, a method and device for acquiring a Bessel beam based on cross phase modulation was proposed, which consists of the steps that (1) a modulation laser beam is focused in a nonlinear medium; (2) the modulated laser beam then is made to enter an imaging device; (3) the light intensity of the laser beam was adjusted till an obvious center bright spot and an obvious concentric circle pattern appeared on the imaging device which is located in a remote field; and (4) a focal distance of a focusing lens or the position of the nonAbstract:
The invention discloses a method and device for acquiring a Bessel beam based on cross phase modulation The method comprises the steps that (1) a modulation laser beam is focused in a nonlinear medium; (2) the modulated laser beam enters the same nonlinear medium in a reverse and co-linear manner, and then is made to enter an imaging device; (3) light intensity of the modulated laser beam is adjusted till an obvious center bright spot and an obvious concentric circle pattern appear on the imaging device which is located in a remote field; and (4) a focal distance of a focusing lens or the position of the nonlinear medium is adjusted, so the Bessel beam with the different center bright spot size can be obtained The method disclosed by the invention has the advantages of a simple structure, easy operations and controllability of the center bright spot sizeread more
Citations
More filters
Patent
Optical tweezers control method based on hollow light dimension adjustment and optical tweezers control device based on hollow light dimension adjustment
TL;DR: In this paper, the authors presented an optical tweezers control method based on hollow light dimension adjustment and an optical two-eezers controller based on the adjustment of the light intensity of the laser beam.
Patent
Method for production of astigmatic elliptic light beam and measurement method for orbital angular momentum thereof
TL;DR: In this paper, a cross phase factor exp (iomegaxy) is loaded at an elliptic light beam waist by using a spatial light modulator to produce the astigmatic ellipsis light beam.
Patent
Method for efficiently processing curved surface structure through adjustable femtosecond laser non-diffracting beam
TL;DR: In this article, a femtosecond laser non-diffracting beam is used to transform a single focus into multiple focuses through combination with a pixel splitting method of the spatial light modulator.
Patent
Time-space self-focusing method of part of coherent light pulse
Ding Chaoliang,Fu Wenwen,Feng Xiaotong,Daliang Li,Zhang Yongtao,Wang Haixia,Ma Baohong,Zhao Cunhua,Pan Liuzhan +8 more
TL;DR: In this article, a time-space self-focusing method for coherent light pulses is proposed, which consists of the following steps: a light pulse source with part space coherence and part time coherence is formed; a mutual-coherence function of statistical optical characteristics of the light pulses source in different time and different spatial positions is established; the mutual coherence function is substituted into a generalized Huygens-Fresnel diffraction integral formula; and an analytical expression of the time intensity of light pulsesource is obtained by calculation.
References
More filters
Journal ArticleDOI
Generation of nondiffracting Bessel beams by use of a spatial light modulator
TL;DR: The characteristics of a singularity in a nondiffracting Bessel beam is explored experimentally by use of a programmable spatial light modulator with 64-level phase holograms and the diffraction efficiency is greatly improved.
Journal ArticleDOI
Generation of achromatic Bessel beams using a compensated spatial light modulator
Jonathan Leach,Graham M. Gibson,Miles J. Padgett,Elric Esposito,Gail McConnell,Amanda J. Wright,John M. Girkin +6 more
TL;DR: This work reports the creation of white-light, achromatic Bessel beams using a spatial light modulator and a prism to compensate for the dispersion, which has a radial wavevector and hence an intensity cross-section which is independent of wavelength.
Journal ArticleDOI
Research of far-field diffraction intensity pattern in hot atomic Rb sample
TL;DR: It is found that the far-field diffraction intensity patterns are intimately related to the incident frequency, power, the atomic number density and the position of the sample.
Patent
STED super-resolution microscope based on first-order Bessel beams and adjustment method thereof
TL;DR: In this article, an STED super-resolution microscope based on first-order Bessel beams and an adjustment method of adjustment method thereof is presented, which is relatively simple in experiment operation without active adjustment.
Patent
Bessel light beam generating device with adjustable parameters and production method of bessel beam generating device
TL;DR: In this article, a bessel light beam generating device with adjustable parameters and a production method of the bessel beam generating devices is presented, where a continuous wave laser device is used to generate a beam of light.