A new beginning: editorial

Gisele Bennett

Appl. Opt. 60(19), ED1-ED1 (2021)  View: HTML | PDF

Astrophotonics: introduction to the feature issue

Aline N. Dinkelaker, Aashia Rahman, Joss Bland-Hawthorn, Faustine Cantalloube, Simon Ellis, Philippe Feautrier, Michael Ireland, Lucas Labadie, and Robert R. Thomson

Appl. Opt. 60(19), AP1-AP6 (2021)  View: HTML | PDF

Design and characterization of a thermally stabilized fiber Fabry–Perot etalon as a wavelength calibrator for high-precision spectroscopy

Liang Tang, Huiqi Ye, Jun Hao, Ruyi Wei, and Dong Xiao

Appl. Opt. 60(19), D1-D8 (2021)  View: HTML | PDF

Simulations of mode-selective photonic lanterns for efficient coupling of starlight into the single-mode regime

Momen Diab, Aashana Tripathi, John Davenport, Aline N. Dinkelaker, Kalaga Madhav, and Martin M. Roth

Appl. Opt. 60(19), D9-D14 (2021)  View: HTML | PDF

Potential of commercial SiN MPW platforms for developing mid/high-resolution integrated photonic spectrographs for astronomy

Pradip Gatkine, Nemanja Jovanovic, Christopher Hopgood, Simon Ellis, Ronald Broeke, Katarzyna Ławniczuk, Jeffrey Jewell, J. Kent Wallace, and Dimitri Mawet

Appl. Opt. 60(19), D15-D32 (2021)  View: HTML | PDF

Building hybridized 28-baseline pupil-remapping photonic interferometers for future high-resolution imaging

Nick Cvetojevic, Barnaby R. M. Norris, Simon Gross, Nemanja Jovanovic, Alexander Arriola, Sylvestre Lacour, Takayuki Kotani, Jon S. Lawrence, Michael J. Withford, and Peter Tuthill

Appl. Opt. 60(19), D33-D42 (2021)  View: HTML | PDF

Vector-apodizing phase plate coronagraph: design, current performance, and future development [Invited]

D. S. Doelman, F. Snik, E. H. Por, S. P. Bos, G. P. P. L. Otten, M. Kenworthy, S. Y. Haffert, M. Wilby, A. J. Bohn, B. J. Sutlieff, K. Miller, M. Ouellet, J. de Boer, C. U. Keller, M. J. Escuti, S. Shi, N. Z. Warriner, K. Hornburg, J. L. Birkby, J. Males, K. M. Morzinski, L. M. Close, J. Codona, J. Long, L. Schatz, J. Lumbres, A. Rodack, K. Van Gorkom, A. Hedglen, O. Guyon, et al.

Appl. Opt. 60(19), D52-D72 (2021)  View: HTML | PDF

Near IR stationary wave Fourier transform lambda meter in lithium niobate: multiplexing and improving optical sampling using spatially shifted nanogroove antenna

Myriam Bonduelle, Irene Heras, Alain Morand, Gwenn Ulliac, Roland Salut, Nadege Courjal, and Guillermo Martin

Appl. Opt. 60(19), D83-D92 (2021)  View: HTML | PDF

Demonstration of high-efficiency photonic lantern couplers for PolyOculus

Christina D. Moraitis, Juan Carlos Alvarado-Zacarias, Rodrigo Amezcua-Correa, Sarik Jeram, and Stephen S. Eikenberry

Appl. Opt. 60(19), D93-D99 (2021)  View: HTML | PDF

Achromatic photonic tricouplers for application in nulling interferometry

Marc-Antoine Martinod, Peter Tuthill, Simon Gross, Barnaby Norris, David Sweeney, and Michael J. Withford

Appl. Opt. 60(19), D100-D107 (2021)  View: HTML | PDF

3D-M3: high-spatial-resolution spectroscopy with extreme AO and 3D-printed micro-lenslets

Theodoros Anagnos, Mareike Trappen, Blaise C. Kuo Tiong, Tobias Feger, Stephanos Yerolatsitis, Robert J. Harris, Julien Lozi, Nemanja Jovanovic, Tim A. Birks, Sébastien Vievard, Olivier Guyon, Itandehui Gris-Sánchez, Sergio G. Leon-Saval, Barnaby Norris, Sebastiaan Y. Haffert, Phillip Hottinger, Matthias Blaicher, Yilin Xu, Christopher H. Betters, Christian Koos, David W. Coutts, Christian Schwab, and Andreas Quirrenbach

Appl. Opt. 60(19), D108-D121 (2021)  View: HTML | PDF

Seeking celestial positronium with an OH-suppressed diffraction-limited spectrograph

Gordon Robertson, Simon Ellis, Qingshan Yu, Joss Bland-Hawthorn, Christopher Betters, Martin Roth, and Sergio Leon-Saval

Appl. Opt. 60(19), D122-D128 (2021)  View: HTML | PDF

First stellar photons for an integrated optics discrete beam combiner at the William Herschel Telescope

Abani Shankar Nayak, Lucas Labadie, Tarun Kumar Sharma, Simone Piacentini, Giacomo Corrielli, Roberto Osellame, Éric Gendron, Jean-Tristan M. Buey, Fanny Chemla, Mathieu Cohen, Nazim A. Bharmal, Lisa F. Bardou, Lazar Staykov, James Osborn, Timothy J. Morris, Ettore Pedretti, Aline N. Dinkelaker, Kalaga V. Madhav, and Martin M. Roth

Appl. Opt. 60(19), D129-D142 (2021)  View: HTML | PDF

Effects of Kolmogorov turbulence on optical cavity spectral response

Merlin L. Mah and Joseph J. Talghader

Appl. Opt. 60(19), 5488-5495 (2021)  View: HTML | PDF

Characteristics of the speckle field under sharper focusing conditions

Chunlin Yang

Appl. Opt. 60(19), 5517-5522 (2021)  View: HTML | PDF

Large dynamic-range fiber Bragg grating sensor system for acoustic emission detection

Zhe Gong, Jiawei Che, Heming Wei, and Sridhar Krishnaswamy

Appl. Opt. 60(19), 5547-5552 (2021)  View: HTML | PDF

Performance improvement of FSO communication systems using hybrid-ARQ protocols

Gyan Deep Verma and Aashish Mathur

Appl. Opt. 60(19), 5553-5563 (2021)  View: HTML | PDF

Performance analysis of an all-optical double-hop free-space optical communication system considering fiber coupling

Yidi Chang, Zhi Liu, Xiaolong Ni, Haifeng Yao, Shiming Gao, Siyuan Gao, and Xin Tong

Appl. Opt. 60(19), 5629-5637 (2021)  View: HTML | PDF

Flame analysis using a simple transmission digital holographic interferometer

Manuel H. De La Torre I., Claudio Frausto-Reyes, David Moreno-H., and Ivan Salgado-Transito

Appl. Opt. 60(19), 5623-5628 (2021)  View: HTML | PDF

Four-direction global matching with cost volume update for stereovision

Yusheng Jin, Hong Zhao, and Penghui Bu

Appl. Opt. 60(19), 5471-5479 (2021)  View: HTML | PDF

Automatic optical inspection platform for real-time surface defects detection on plane optical components based on semantic segmentation

Jules Karangwa, Linghua Kong, Dingrong Yi, and Jishi Zheng

Appl. Opt. 60(19), 5496-5506 (2021)  View: HTML | PDF

Transform-based phase retrieval techniques from a single off-axis interferogram

Bagath Chandraprasad T, Pramitha Vayalamkuzhi, and Shanti Bhattacharya

Appl. Opt. 60(19), 5523-5533 (2021)  View: HTML | PDF  [Suppl. Mat. (1)]

Latent fingerprint residue detection method using Sagnac Fourier transform imaging spectroscopy

Xueqiong Bai, Wenming Yang, Weitao Song, and Ningfang Liao

Appl. Opt. 60(19), 5534-5539 (2021)  View: HTML | PDF

Non-uniform illumination correction based on multi-scale Retinex in digital image correlation

Long Sun, Chen Tang, Min Xu, and Zhenkun Lei

Appl. Opt. 60(19), 5599-5609 (2021)  View: HTML | PDF

Regularization-parameter-free optimization approach for image deconvolution

Sunaina Rajora, Mansi Butola, and Kedar Khare

Appl. Opt. 60(19), 5669-5677 (2021)  View: HTML | PDF

One-shot dual-projection topography enhanced by phase-shifting logical moiré

Jiajia Jiang and Hongwei Guo

Appl. Opt. 60(19), 5507-5516 (2021)  View: HTML | PDF

Measurement algorithm for wafer alignment based on principal component analysis

Ting Shu, Shaoqing Wang, Jinghao Xu, Lili Fan, Fenghua Yuan, Songyong Pan, Fengzhao Dai, Yang Bu, and Xiangzhao Wang

Appl. Opt. 60(19), 5569-5580 (2021)  View: HTML | PDF

Measuring perceived sweetness by monitoring sorbitol concentration in apples using a non-destructive polarization-based readout

Mukul Sarykar and Maher Assaad

Appl. Opt. 60(19), 5723-5734 (2021)  View: HTML | PDF

Bidirectional grating based interleaved angled MMI for high-uniformity wavelength division (de)multiplexing and surface-normal fiber packaging

Zanyun Zhang, Tianjun Liu, Kaixin Zhang, Meixin Li, Hongwei Liu, Hongqiang Li, Pingjuan Niu, and Erdan Gu

Appl. Opt. 60(19), 5615-5622 (2021)  View: HTML | PDF

Configurable topological phonon polaritons in twisted hBN metasurfaces

Shaopeng Li, Jing Zhou, and Wei Du

Appl. Opt. 60(19), 5735-5741 (2021)  View: HTML | PDF

Titanium content influence on the optical response characteristics of TiO₂/ormosils composite films doped with azobenzene

Xuehua Zhang, Shun Liu, Chu Xue, Wei Zhang, Rui Sun, and Fangren Hu

Appl. Opt. 60(19), 5581-5587 (2021)  View: HTML | PDF

Efficient second-harmonic and terahertz generation from single BiB₃O₆crystal using nanosecond and femtosecond lasers

Chandan Ghorui, A. M. Rudra, Udit Chatterjee, A. K. Chaudhary, and D. Ganesh

Appl. Opt. 60(19), 5643-5651 (2021)  View: HTML | PDF

Laser regulation for variable color temperature lighting with low energy consumption by microlens arrays

Peng Liu, Zuwei Guan, Tianfeng Zhou, Qiuchen Xie, Qian Yu, Yupeng He, Zihao Zeng, and Xibin Wang

Appl. Opt. 60(19), 5652-5661 (2021)  View: HTML | PDF

Ultra-flat optical frequency comb generation based on a polarization modulator and a Butterworth band-stop filter

Yifeng Guo, Yu Liu, Dan Li, and Shibao Wu

Appl. Opt. 60(19), 5540-5546 (2021)  View: HTML | PDF

Relaxation characteristics for efficient fluorescence lifetime detection of gain media in the fiber laser

Desheng Zhu, Yuanyang Zhao, Yourui Tu, Ruifeng Li, Keyan Liu, Yunkun Zhao, Benli Yu, and Liang Lu

Appl. Opt. 60(19), 5678-5681 (2021)  View: HTML | PDF

Highly tunable thermal emitter with vanadium dioxide metamaterials for radiative cooling

Yuanlin Jia, Xiaoxia Wang, Huaiyuan Yin, Huawei Yao, Junqiao Wang, and Chunzhen Fan

Appl. Opt. 60(19), 5699-5706 (2021)  View: HTML | PDF

Terahertz ultrasensitive dual-core photonic crystal fiber microfluidic sensor for detecting high-absorption analytes

Shanshan Li, Hao Zhang, Fei Fan, and Shengjiang Chang

Appl. Opt. 60(19), 5716-5722 (2021)  View: HTML | PDF

Flavor classification and year prediction of Chinese Baijiu by time-resolved fluorescence

Ye Zhang, Jiao Gu, Chaoqun Ma, Yamin Wu, Lei Li, Chun Zhu, Hui Gao, Zichen Yang, Yunpeng Shang, Chengwei Wang, and Guoqing Chen

Appl. Opt. 60(19), 5480-5487 (2021)  View: HTML | PDF  [Suppl. Mat. (1)]

Wavelength selection of terahertz time-domain spectroscopy based on a partial least squares model for quantitative analysis

Qingxiao Ma, Chun Li, Biao Wang, Xin Ma, and Ling Jiang

Appl. Opt. 60(19), 5638-5642 (2021)  View: HTML | PDF

Automated material identification with a Raman spectrometer based on the contribution enhancement of small differences and the adaptive target Raman peak subtraction

Fei Huang, Meng Xue, Zhaoqing Yang, and Hanming Guo

Appl. Opt. 60(19), 5682-5690 (2021)  View: HTML | PDF

Baseline correction method based on improved adaptive iteratively reweighted penalized least squares for the x-ray fluorescence spectrum

Xiaoyu Jiang, Fusheng Li, Qingya Wang, Jie Luo, Jun Hao, and Muqiang Xu

Appl. Opt. 60(19), 5707-5715 (2021)  View: HTML | PDF  [Suppl. Mat. (1)]

Quantitative 2D thermometry in turbulent sooting non-premixed flames using filtered Rayleigh scattering

Jinpeng Pu and Jeffrey A. Sutton

Appl. Opt. 60(19), 5742-5751 (2021)  View: HTML | PDF

Optical cages made of graphitic frameworks

J. P. Walker, K. McDonough, and H. Grebel

Appl. Opt. 60(19), 5564-5568 (2021)  View: HTML | PDF

Sensitivity enhancement of the SPR biosensor for Pseudomonas bacterial detection employing a silicon-barium titanate structure

Yesudasu Vasimalla, Himansu Shekhar Pradhan, and Rahul Jasvantbhai Pandya

Appl. Opt. 60(19), 5588-5598 (2021)  View: HTML | PDF

Dual-frequency unidirectional reflectionless propagation in a non-Hermitian graphene plasmonic waveguide-cavity coupling system

Guofeng Yang, Jian Ding, and Yueke Wang

Appl. Opt. 60(19), 5610-5614 (2021)  View: HTML | PDF

Graphic-processable deep neural network for the efficient prediction of 2D diffractive chiral metamaterials

Jun Zhang, Yukun Luo, Zilong Tao, and Jie You

Appl. Opt. 60(19), 5691-5698 (2021)  View: HTML | PDF