Generation of second-harmonic Ince-Gaussian beams

Wang, Meng-Ying; Tang, Jie; Wang, Huijun; Ming, Yang; Zhang, Yong; Cui, Guihua; Lu, Yanqing

doi:10.1063/1.5041986

Cited by 11 publications

(8 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, there have been few reports on this topic, such as ref. 29 reported generation second-harmonic IG modes by adding diffraction gratings on the crystal, and in particular, a quantitative selection rule of IG modes during nonlinear transformation is still a research gap to date.…”

mentioning

confidence: 99%

Parametric upconversion of Ince–Gaussian modes

Yang

Gao

et al. 2020

Opt. Lett.

View full text Add to dashboard Cite

Ince-Gaussian (IG) mode, a recently discovered type of structured Gaussian beam, corresponds to eigenfunctions of the paraxial wave equation in elliptical coordinates. This propagation-invariant mode is of significance in various domains, and in particular, its nonlinear transformation; however, there have been few relevant studies to date. In this work, we report the parametric upconversion of IG modes and associated full-field selection rule for the first time. We demonstrate that IG signals can be perfectly upconverted by a flattop-beam pump; in contrast, significant mode distortion occurred when using the most common Gaussian pump. Particular attention was given to the origin of the distortion, i.e., radial-mode degeneration induced by the sum-frequency generation excited by Gaussian pump. This proof-ofprinciple demonstration has great significance in relevant areas, such as high-dimension quantum frequency interfacing and upconversion imaging.

show abstract

mentioning

confidence: 99%

Parametric upconversion of Ince–Gaussian modes

Yang

Gao

et al. 2020

Opt. Lett.

View full text Add to dashboard Cite

show abstract

“…In order to encode the designed DVG phase mask to the quadratic susceptibility of LN nonlinear crystal, the electric poling method is adopted in the sample preparation process. [38,39] The +z face of a z-cut LN slice is covered with a 120-nm-thick Cr electrode having the designed DVG pattern, through the process of maskless photolithography, vacuum deposition, and photoresist removal. High voltage pulses slightly larger than the coercive field of the used 50-µm-thick LN slice are applied to convert the spontaneous polarization directions.…”

Section: Resultsmentioning

confidence: 99%

Visible and Online Detection of Near‐Infrared Optical Vortices via Nonlinear Photonic Crystals

Liu

Chen

Zhang

et al. 2021

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

have been extensively investigated in the past three decades. [1,2] Theoretically, OVs carry well-defined orbital angular momentum (OAM), [1] which adds a new degree of freedom in beam steering and have been applied in both classical and quantum regions of light. [3][4][5][6] Compared with the visible beam, the near-infrared (NIR) beam has a series of unique advantages, such as avoiding photo-induced cytotoxicity [7] and conveniently generating by traditional lasers. [8,9] Especially in the field of optical communication, since the NIR band lies in the low loss and nearzero dispersion area of commercial silica fiber, NIR optical sources have been widely used. [10,11] Due to their extra informationcarrying capacity, the NIR OVs could profoundly improve the performance of optical communication systems. [5,12,13] The developments of NIR OVs in optical communication generally contain three aspects, transmission, generation, and detection. For transmission, several schemes such as free-space optical transmission, [5] spiral fiber, [12] and few-mode fiber [14] have been demonstrated. Meanwhile, NIR OVs could be generated by spiral phase plates, [1,15] q-plates, [16] fork grating, [17] metamaterials, [18,19] and so on. Towards detection, most of the methods suggested using various devices, such as linear Dammman gratings, [20] spatial light modulator, [21] and metasurfaces [22] to transform the OVs to Gaussian modes, and then perform detection. However, all these methods cannot be used for online detection due to the transform of the entire incident OVs and the requirement of other devices in the following reconstruction. [23] Additionally, despite silicon-based detectors, which have shown excellent quality and high resolution in visible regions, NIR detectors, which are based on InGaAs have been suffered from high readout noise, low-speed response, and stringent cooling requirements. [23] Although the above schemes could realize NIR OVs detection, all of them could not avoid using the InGaAs-based detectors, which goes against their applications in optical communications, to a certain extent.One practical solution is to convert and detect the NIR OVs in visible regions with enhanced imaging performance. Nonlinear up-conversion NIR imaging is conducted in visible regions with high contrast and resolution images captured by silicon charge coupled devices (CCDs). [24][25][26][27] Earlier research efforts also have proved that, the OAM will be conserved in the nonlinear processes involved with OVs, [28,29] which provides a theoretical basis Near-infrared (NIR) optical vortices (OVs), which carry specific orbital angular momentum, are believed to greatly increase the capacity of conventional optical communication systems. However, due to the equipment limits in invisible wavelengths, NIR OVs detection remains a great difficulty. Here, the up-conversion imaging technology is exploited to circumvent using NIR detectors. A lithium niobate crystal with its quadratic susceptibility modulated by a specially designed Dammann vorte...

show abstract

“…Wang et al [ 15 ] demonstrated Ince–Gaussian-beam array generation by using a computer-generated hologram (CGH) and spatial light modulator (SLM). A second harmonic Ince–Gaussian beam generation was reported by Wang et al [ 16 ] by employing a binary non-linear CGH. Ohtomo et al [ 17 ] demonstrated a method to generate vortex, HG and IG beams, and also the conversion of one structural beam to another using an astigmatism mode converter (AMC).…”

Section: Introductionmentioning

confidence: 99%

Generation of Ince–Gaussian Beams Using Azocarbazole Polymer CGH

et al. 2022

View full text Add to dashboard Cite

Ince–Gaussian beams, defined as a solution to a wave equation in elliptical coordinates, have shown great advantages in applications such as optical communication, optical trapping and optical computation. However, to ingress these applications, a compact and scalable method for generating these beams is required. Here, we present a simple method that satisfies the above requirement, and is capable of generating arbitrary Ince–Gaussian beams and their superposed states through a computer-generated hologram of size 1mm2, fabricated on an azocarbazole polymer film. Other structural beams that can be derived from the Ince–Gaussian beam were also successfully generated by changing the elliptical parameters of the Ince–Gaussian beam. The orthogonality relations between different Ince–Gaussian modes were investigated in order to verify applicability in an optical communication regime. The complete python source code for computing the Ince–Gaussian beams and their holograms are also provided.

show abstract

Generation of second-harmonic Ince-Gaussian beams

Cited by 11 publications

References 37 publications

Parametric upconversion of Ince–Gaussian modes

Parametric upconversion of Ince–Gaussian modes

Visible and Online Detection of Near‐Infrared Optical Vortices via Nonlinear Photonic Crystals

Generation of Ince–Gaussian Beams Using Azocarbazole Polymer CGH

Contact Info

Product

Resources

About