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Holo/Or艾里光束發(fā)生器

艾里光束是一種非衍射波形，不會隨光束傳播而散開，并且在行進(jìn)時呈現(xiàn)出彎曲的外觀。
艾里光束也具有自由加速的特性。隨著傳播，它彎曲以形成拋物線弧。
理想的艾里光束的橫截面將顯示出主強(qiáng)度區(qū)域，并且一系列相鄰的，發(fā)光度較低的區(qū)域逐漸縮小到無窮大。
HOLO/OR  建議使用特殊的DOE元素將高斯光束轉(zhuǎn)換為艾里光束。 

多級通風(fēng)光束  

二元分裂通風(fēng)光束

Holo/Or艾里光束發(fā)生器規(guī)格型號

* Separation angle between the 2 Airy Beams: 9.2 Degrees
** High Efficiency

圖1

Ultrafast Airy beam optical parametric oscillator.

(a) Schematic illustration of the experimental setup for the ultrafast Airy beam OPO. λ/2: half-wave plate; PBS: polarizing beam-splitter cube; L1-2: Lenses; M1-3: mirrors; OC: output coupler; C: MgO:PPLN crystal (in oven); CPM: cubic phase mask; S: dichroic mirrors; PM: power meter. Recorded intensity profile of (b) resonant signal, (c) idler and (d) Airy beam, (e) 3-D illustration of the generated Airy beam.

圖2

Characteristics of Airy beam.

(a) Measurement of beam acceleration of the Airy beam OPO as a function of propagation distance. Solid line (black) represents theoretically predicted acceleration, (red) is the quadratic fit to the experimental data (dots). (Inset) Variation in the width (FWHM) of the central lobe of the Airy beam over propagation. Solid line (red) is linear fit to data (dots). (b–e) Verification of self-healing property of the output beam of the Airy beam OPO. (f) The line profile of the beam at a distance z = 10 cm (blue), z = 60 cm (red), z = 120 cm (brown) from the Fourier plane.

圖3

Performance of the ultrafast Airy beam source.

(a) Variation of the Airy beam signal power across the tuning range of the ultrafast OPO, while pumping with ~10.5 W of input power. (b) Variation of Airy beam (λ_Airy = 1632 nm) signal power with pump power. (c) Dependence of signal (λ_s = 1632 nm) and idler (λ_i = 3057 nm) power in Gaussian intensity distribution on pump power. (d) Interference autocorrelation trace of the Airy beam signal pulses. Inset: Corresponding spectrum.