Articles

3D flame reconstruction and error calculation from a schlieren projection

In this work a 3D flame reconstruction is performed from a 2D projection of the hot gases of a combustion flame. The projection is obtained using an optical schlieren technique. In this technique, a schlieren ...

Authors: C. Alvarez-Herrera, J. L. Herrera-Aguilar, D. Moreno-Hernández, A. V. Contreras-García and J. G. Murillo-Ramírez

Correction to: Mid-spatial frequency error generation mechanisms and prevention strategies for the grinding process

An amendment to this paper has been published and can be accessed via the original article.

Authors: Mario Pohl, Olga Kukso, Rainer Boerret and Rolf Rascher

Mid-spatial frequency error generation mechanisms and prevention strategies for the grinding process

The research presented in this paper is focused on the link between manufacturing parameters and the resulting mid-spatial frequency error in the manufacturing process of precision optics. The goal is to under...

Authors: Mario Pohl, Olga Kukso, Rainer Boerret and Rolf Rascher

Hermitian and non-Hermitian shortcuts to adiabaticity for fast creation of maximum coherence and beam splitting

We theoretically exploit the shortcuts to adiabaticity (STA) technique in Hermitian and non-Hermitian quantum systems to realize the maximum coherence and beam splitting by eliminating the nonadiabatic couplin...

Authors: Kai Tang, Zhengfeng Hu, Xi Chen and Chengpu Liu

Transverse electric surface waves in ferrite medium surrounded by plasma layers

The theoretical analysis of transverse electric surface waves in ferrite medium surrounded by isotropic plasma layers is presented in this manuscript. Maxwell’s equations in differential form are used, and we ...

Authors: M. Umair, A. Ghaffar, Majeed A. S. Alkanhal, Ali H. Alqahtani and Y. Khan

Macro to nano specimen measurements using photons and electrons with digital holographic interferometry: a review

Today digital holographic interferometry (DHI) is considered a modern full-field non-destructive technique that allows generating 3D quantitative data of a wide variety of specimens. There are diverse optical ...

Authors: María del Socorro Hernández-Montes, Fernando Mendoza-Santoyo, Mauricio Flores Moreno, Manuel de la Torre-Ibarra, Luis Silva Acosta and Natalith Palacios-Ortega

Dual parameter measurement system for temperature and stress based on Sagnac interferomter

Authors: Huanhuan Yan, Li Wang, Songtao Li and Jin Wang

Design of high performance and low resistive loss graphene solar cells

Despite metallic plasmonic excitations can enhance the performance of ultra-thin solar cells however these so-called plasmonic solar cells suffer from a large resistive (Ohmic) loss caused by metallic elements...

Authors: Mohammad Sabaeian and Yaser Hajati

Complimentary code keying of spectral amplitude coding signals in optical buffering with increased capacity

Signal buffering services such as contention resolution and congestion avoidance are essential in optical packet switching networks. In this paper, an optical memory scheme based on spectral amplitude coding (...

Authors: Kai-Sheng Chen and Wien Hong

Full-chain modeling and performance analysis of integral imaging three-dimensional display system

The full-chain system performance characterization is very important for the optimization design of an integral imaging three-dimensional (3D) display system. In this paper, the acquisition and display process...

Authors: Ying Yuan, Xiaorui Wang, Yang Yang, Hang Yuan, Chao Zhang and Zhenshun Zhao

On the average secrecy capacity for indoor visible light communication systems

For visible light communication (VLC), the light signals are transmitted without optical fibers or any sort of wave-guiding. Due to the inherent broadcast nature, physical-layer security emerges as a promising...

Authors: Jun Zheng Zhang and Ke Ke

Research on optical 32QAM-OFDM-PON access scheme with different numbers of sub-carriers using DMT modulation

An optical 32QAM-OFDM-PON system with different numbers of sub-carriers using discrete multitone (DMT) modulation and demodulation is designed and demonstrated by experiment. Electron-optic generation, directl...

Authors: Yufeng Shao, Ying Long, Anrong Wang, Zefu Tan, Guoping Lei, Zhengquan Hu, Yu Liu, Qinzheng Hu, Zhuang Wang and Jie Yang

Construct freeform surface directly in an initial layout of an off-axis reflective image system by seed curve extension and simulated annealing algorithm

In this paper, a method of how to construct a freeform surface directly in an off-axis reflective image system is proposed. The method includes both the seed curve extension algorithm and simulated annealing a...

Authors: Hongxiang Pan, Zhouping Su, Yangliu Zhang and Tao Wu

Spatial localization of hotspots in Fano-resonant plasmonic oligomers for surface-enhanced coherent anti-Stokes Raman scattering

Realization of Fano resonance in plasmonic oligomers is often exploited to design efficient plasmonic substrates for surface-enhanced coherent anti-Stokes Raman scattering. Disk-type Fano-resonant plasmonic ol...

Authors: Arpan Dutta and Erik M. Vartiainen

Design and performance analysis of integrated focusing grating couplers for the transverse-magnetic TM₀₀ mode in a photonic BiCMOS technology

Focusing grating couplers for the excitation of the fundamental transverse-magnetic (TM) mode in integrated silicon photonic waveguides are designed and characterized under the boundary conditions of a photoni...

Authors: Galina Georgieva, Karsten Voigt, Anna Peczek, Christian Mai and Lars Zimmermann

Integrated Er/Si Schottky Photodetectors on the end facet of optical waveguides

In the last two decades there has been growing interest in silicon photonics and in the possibility to integrate new materials to overcome the silicon intrinsic limitations. Erbium has represented a viable sol...

Authors: T. Crisci, L. Moretti, M. Gioffrè, M. Iodice, G. Coppola and M. Casalino

The performance of consumer-grade near infrared spectrometer in traditional Chinese medicine

Technical advances in instrument manufacturing have promoted the miniaturization and cost reduction of portable NIR spectrometers. The price of a device is now affordable to ordinary consumers, which might pro...

Authors: Zhaozhou Lin, Zhihong Zhuang, Chongnian Luo, Jiayu Zhang and Hao Gu

Low-noise transfer of the spectral purity of an optical comb line using a feedforward scheme

We present a detailed frequency noise analysis of a feedforward scheme used to faithfully transfer the spectral properties of an individual line of an optical frequency comb spectrum to a single-mode laser and...

Authors: Pierre Brochard, Benjamin Rudin, Florian Emaury, Valentin J. Wittwer, Stéphane Schilt and Thomas Südmeyer

Correction of wavefront rotation between interferometer and shack-hartmann sensor using bending modes

In some active optics system, the influence function, which is the surface deformation ability of an actuator, is measured by directly detecting the mirror surface using an interferometer and the surface corre...

Authors: Yi Zhu, Tao Chen and Hongzhuang Li

Round robin comparison study on the form measurement of optical freeform surfaces

A round robin comparison of freeform form measurements was carried out by the project partners and stakeholders of a European metrology research project. Altogether six measuring instruments were considered: f...

Authors: Ines Fortmeier, Reyko Schachtschneider, Vit Ledl, Ondrej Matousek, Jens Siepmann, Antonia Harsch, Rolf Beisswanger, Youichi Bitou, Yohan Kondo, Michael Schulz and Clemens Elster

Infrared stripe correction algorithm based on wavelet decomposition and total variation-guided filtering

Stripe non-uniformity severely affects the quality of infrared images. It is challenging to remove stripe noise in low-texture images without blurring the details. We propose a single-frame image stripe correc...

Authors: Ende Wang, Ping Jiang, Xuepeng Li and Hui Cao

Orthogonally coupled geometrical constraints in optics design

Modern optical multi-camera systems require integrating many camera modules in a small volume. A new space-saving concept for such imaging systems is presented, based on intersecting optical paths that utilize...

Authors: Jyrki Kimmel

Fully automating fine-optics manufacture - why so tough, and what are we doing?

Precision and ultra-precision surfaces are crucial for many products – quality optics, joint & cranial implants, turbine blades, and industrial moulds & dies, to name a few. Automation in this context is disti...

Authors: David Douglas Walker, Thomas Leo McCluskey, Guoyu Yu, Sanja Petrovic and Hongyu Li

Study of a periodic spectral fluctuation existing in a fibered optical feedback cavity-enhanced absorption spectroscopy (OF-CEAS)

A special periodic spectral fluctuation is observed during the study of a fibered high sensitivity optical feedback cavity-enhanced absorption spectroscopy (OF-CEAS) for the measurement of trace gas. This spec...

Authors: Zhifu Luo, Zhongqi Tan and Xingwu Long

Inducing tunable single-mode operation of Fabry-Perot semiconductor laser coupled with very-short cavity with selective optical feedback

We report on achieving tuned single mode operation of a multimode semiconductor laser by coupling it to a very-short external cavity with selective feedback. We show that the induced uniform feedback light fro...

Authors: Mohammed S. Al-Ghamdi, Ahmed Bakry and Moustafa Ahmed

Qualitative analysis of Sudan IV in edible palm oil

Palm oil is one of the most useful vegetable available. Sudan IV dye is used as hue enhancer in palm oil despite the ban as food colorant due to its carcinogenicity and mutagenicity by the International Agency...

Authors: Sampson Saj Andoh, Tarmo Nuutinen, Cheetham Mingle and Matthieu Roussey

Improving the calibration of phase measuring deflectometry by a polynomial representation of the display shape

Phase measuring deflectometry is a highly precise and full field metrology technique for specular surfaces based on the distortion of known reference patterns observed as a reflection at the surface under test...

Authors: Jonas Bartsch, Michael Kalms and Ralf B. Bergmann

Nano-structured transmissive spectral filter matrix based on guided-mode resonances

In this work, a nanostructured guided-mode resonance filter matrix with high transmission efficiency and narrow bandwidth is demonstrated. The developed nano-filter arrays have various usages, e.g., combined w...

Authors: Wenze Wu, Leonard Weber, Peter Hinze, Thomas Weimann, Thorsten Dziomba, Bernd Bodermann, Stefanie Kroker, Joan Daniel Prades, Hutomo Suryo Wasisto and Andreas Waag

Rigid aspheric smoothing tool for mid-spatial frequency errors on aspheric or freeform optical surfaces

In order to remove mid-spatial frequency errors on aspheric and freeform surfaces, we have developed an aspheric smoothing tool which, unusually, is rigid. This has been proved feasible in the special case whe...

Authors: Guoyu Yu, Lunzhe Wu, Xing Su, Yuancheng Li, Ke Wang, Hongyu Li and David Walker

Diffraction of a Gaussian beam near the beam waist

The behavior of the light field near the beam waist has attracted considerable attention due to the studies of the light spin-orbit interaction: it’s manifestation as well as potential applications. Similarly,...

Authors: Evelina A Bibikova, Nazar Al-wassiti and Nataliya D Kundikova

Software Defined Optical Networks (SDON): proposed architecture and comparative analysis

Interface SDN network with Optical network to enhance the capability of current optical network capability to achieve high data rate support to fulfilled 5G and Internet of things (IoT) backbone capacity requi...

Authors: Rakesh Kumar Jha and Burhan Num Mina Llah

The amazing progress of high-power ultrafast thin-disk lasers

Ultrafast lasers continue to be at the forefront of many scientific breakthroughs and technological achievements and progress in the performance of these systems continue to open doors in many new and exciting...

Authors: Clara J. Saraceno, Dirk Sutter, Thomas Metzger and Marwan Abdou Ahmed

Hybrid refractive holographic single vision spectacle lenses

In this contribution, we investigate hybrid single vision spectacle lenses (SVSLs) consisting of holographic optical elements (HOEs) embedded into a refractive lens. We evaluate the performance of two examples...

Authors: Jannik M. Trapp, Toufic G. Jabbour, Gerhard Kelch, Thomas Pertsch and Manuel Decker

Optical soliton perturbation of Fokas-Lenells equation by the Laplace-Adomian decomposition algorithm

This paper displays numerical simulation for bright and dark optical solitons that emerge from Fokas-Lenells equation which is studied in the context of dispersive solitons in polarization-preserving fibers. T...

Authors: O. González-Gaxiola, Anjan Biswas and Milivoj R. Belic

Photoinduced supramolecular chirality and spontaneous surface patterning in high-performance azo materials

In this work, two photo-structuring processes, photo induced spontaneous surface structuring (PSSP) and photo induced supramolecular chirality (PSC) are applied to high-performance azo polymers. We demonstrate...

Authors: Sekvan Bagatur and Thomas Fuhrmann-Lieker

Illumination optics design for DMD Pico-projectors based on generalized functional method and microlens array

The influence of incident angle and aberration of the microlens array on the optical efficiency in pico-projector is analyzed. By modifying the relevant parameters, a method to optimize the optical efficiency ...

Authors: Dan Li, Baolong Zhang and Jiawei Zhu

Electromagnetic waves scattering from a sphere of complex conjugate medium

A boundary value problem involving the scattering of electromagnetic waves from a sphere of complex conjugate medium (CCM) is studied. The sphere is placed in free space. The source of excitation for the spher...

Authors: Ahsan Illahi, M. Bashir, Majeed A. S. Alkanhal, Sadia Khatoon, Abdul Ghaffar and Y. Khan

Zoom systems with tuneable lenses and linear lens movements

Classical zoom lenses are based on movements of sub-modules along the optical axis. Generally, a constant image plane position requires at least one nonlinear sub-module movement. This nonlinearity poses a cha...

Authors: Leonhard Lenk, Beate Mitschunas and Stefan Sinzinger

Extraction optics for high lumen density sources

For lighting applications demanding high brightness, a new type of LED-based light source has been developed, the high lumen density (HLD) source (luminance > 2·10⁹ cd/m²). The performance can be improved further...

Authors: Dick K. G. de Boer and Ludo Haenen

Tapered photonic crystal fibers coated with ultra-thin films for highly sensitive bio-chemical sensing

Photonic crystal fiber Mach-Zehnder modal interferometers based on no adiabatic tapered fibers are perspective for bio-chemical sensing, since they have very high refractive index sensitivity and it is possibl...

Authors: Vladimir P. Minkovich and Alexander B. Sotsky

Strip-loaded nano-photonics on horizontal slot waveguide

A strip-loaded slot waveguide is a waveguide platform allowing a large amount of degrees of freedom in terms of fabrication. Contrary to other waveguide types where the guiding layer has to be patterned, only ...

Authors: Ségolène Pélisset and Matthieu Roussey

Spectral composition of low-coherence interferograms at high numerical apertures

Interference signals in coherence scanning interferometry at high numerical apertures and narrow bandwidth illumination are spectrally broadened. This enables phase analysis within a spectral range much wider ...

Authors: Peter Lehmann, Stanislav Tereschenko, Benedikt Allendorf, Sebastian Hagemeier and Lucie Hüser

Scattering of partially coherent surface plasmon polariton fields by metallic nanostripe

Surface plasmon polaritons (SPPs) are electromagnetic waves that propagate at a metal-dielectric interface. Until recently, monochromatic, fully coherent SPPs have mainly been considered.

Authors: Salman Daniel, Kimmo Saastamoinen, Sergey A. Ponomarenko and Ari T. Friberg

An auxiliary field approach for computing optical resonances in dispersive media

We report on an auxiliary field approach for solving nonlinear eigenvalue problems occurring in nano-optical systems with material dispersion. The material dispersion can be described by a rational function fo...

Authors: Felix Binkowski, Lin Zschiedrich and Sven Burger

Optimization of laser wavelength, power and pulse duration for eye-safe Raman spectroscopy

Raising the interest in remote chemical analysis, in particular through Raman and fluorescence spectroscopy, the opportunity of increasing the exposure represents an important step for an easier and more relia...

Authors: Federico Angelini and Francesco Colao

A new calibration method for line-structured light vision sensors based on concentric circle feature

Determining the relative ubiety between the camera and the laser projector in a line-structured light vision sensor is a classical yet important task. Typical calibration methods often confront problems, such ...

Authors: Mingwei Shao, Junyu Dong and Amanuel Hirpa Madessa

Optical image encryption using gamma distribution phase masks in the gyrator domain

Optical information encryption technology has received extensive attention from researchers in recent years because of its advantages of parallel and high-speed processing capability, as well as the controllab...

Authors: Wenqing Sun, Lei Wang, Jun Wang, Hua Li and Quanying Wu

Homogenization with coherent light illuminated beam shaping diffusers for vision applications: spatial resolution limited by speckle pattern

Homogenizing properties of beam shaping diffusers illuminated with coherent laser light was studied with special regard on their use in vision applications.

Authors: Bence Kondász, Béla Hopp and Tomi Smausz

Three-dimensional shape measurement of complex surfaces based on optimized dithering fringe patterns

Optimized dithering fringe pattern is a promising method for high-speed, high-accuracy three-dimensional shape measurement. The recently proposed dithering optimization technology optimizes the fringe quality ...

Authors: Feng Lu, Chengdong Wu and Jikun Yang

Suppression of residual amplitude modulation appeared in commercial electro-optic modulator to improve iodine-frequency-stabilized laser diode using frequency modulation spectroscopy

This paper shows how to suppress residual amplitude modulation (RAM) appeared in a commercial electro-optic modulator (EOM) to improve an iodine-frequency-stabilized laser diode (LD) using frequency modulation...

Authors: Quang Anh Duong, Thanh Dong Nguyen, Thanh Tung Vu, Masato Higuchi, Dong Wei and Masato Aketagawa