Vol. 9, Iss. 7 -- July 20, 2022 | Reviews Nonlinear multimode photonics: nonlinear optics with many degrees of freedom Logan G. Wright, William H. Renninger, Demetri N. Christodoulides, and Frank W. Wise Optica 9(7), 824-841 (2022)  View: HTML | PDF Vol. 9, Iss. 7 -- July 20, 2022 | Letters Spatially multiplexed single-cavity dual-comb laser J. Pupeikis, B. Willenberg, S. L. Camenzind, A. Benayad, P. Camy, C. R. Phillips, and U. Keller Optica 9(7), 713-716 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] Vol. 9, Iss. 7 -- July 20, 2022 | Research Articles Hybrid training of optical neural networks James Spall, Xianxin Guo, and A. I. Lvovsky Optica 9(7), 803-811 (2022)  View: HTML | PDF Fluorescent wavefront shaping using incoherent iterative phase conjugation Dror Aizik, Ioannis Gkioulekas, and Anat Levin Optica 9(7), 746-754 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] 36 Hz integral linewidth laser based on a photonic integrated 4.0 m coil resonator Kaikai Liu, Nitesh Chauhan, Jiawei Wang, Andrei Isichenko, Grant M. Brodnik, Paul A. Morton, Ryan O. Behunin, Scott B. Papp, and Daniel J. Blumenthal Optica 9(7), 770-775 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] Monadic Pavlovian associative learning in a backpropagation-free photonic network James Y. S. Tan, Zengguang Cheng, Johannes Feldmann, Xuan Li, Nathan Youngblood, Utku E. Ali, C. David Wright, Wolfram H. P. Pernice, and Harish Bhaskaran Optica 9(7), 792-802 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] Brillouin backaction thermometry for modal temperature control Yu-Hung Lai, Zhiquan Yuan, Myoung-Gyun Suh, Yu-Kun Lu, Heming Wang, and Kerry J. Vahala Optica 9(7), 701-705 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] Relative timing jitter in a counterpropagating all-normal dispersion dual-comb fiber laser Neeraj Prakash, Shu-Wei Huang, and Bowen Li Optica 9(7), 717-723 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] Spatiotemporal sampling of near-petahertz vortex fields Johannes Blöchl, Johannes Schötz, Ancyline Maliakkal, Natālija Šreibere, Zilong Wang, Philipp Rosenberger, Peter Hommelhoff, Andre Staudte, Paul B. Corkum, Boris Bergues, and Matthias F. Kling Optica 9(7), 755-761 (2022)  View: HTML | PDF  [Suppl. Mat. (2)] Coherent and ultrashort soft x-ray pulses from echo-enabled harmonic cascade free-electron lasers Chao Feng, Tao Liu, Si Chen, Kaishang Zhou, Kaiqing Zhang, Zheng Qi, Duan Gu, Zhen Wang, Zenggong Jiang, Xuan Li, Baoliang Wang, Xingtao Wang, Wenyan Zhang, Lie Feng, Chunlei Li, Taihe Lan, Bin Li, Meng Zhang, Haixiao Deng, Dao Xiang, Bo Liu, and Zhentang Zhao Optica 9(7), 785-791 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] Reconfigurable photon localization by coherent drive and dissipation in photonic lattices O. Jamadi, B. Real, K. Sawicki, C. Hainaut, A. González-Tudela, N. Pernet, I. Sagnes, M. Morassi, A. Lemaître, L. Le Gratiet, A. Harouri, S. Ravets, J. Bloch, and A. Amo Optica 9(7), 706-712 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] Photon conservation in trans-luminal metamaterials J. B. Pendry, E. Galiffi, and P. A. Huidobro Optica 9(7), 724-730 (2022)  View: HTML | PDF High-speed waveguide Ge/Si avalanche photodiode with a gain-bandwidth product of 615 GHz Yuluan Xiang, Hengzhen Cao, Chaoyue Liu, Jingshu Guo, and Daoxin Dai Optica 9(7), 762-769 (2022)  View: HTML | PDF Cloaked near-field probe for non-invasive near-field optical microscopy Felipe Bernal Arango, Filippo Alpeggiani, Donato Conteduca, Aron Opheij, Aobo Chen, Mohamed I. Abdelrahman, Thomas F. Krauss, Andrea Alù, Francesco Monticone, and Laurens Kuipers Optica 9(7), 684-691 (2022)  View: HTML | PDF To what extent can space be compressed? Bandwidth limits of spaceplates Kunal Shastri, Orad Reshef, Robert W. Boyd, Jeff S. Lundeen, and Francesco Monticone Optica 9(7), 738-745 (2022)  View: HTML | PDF Real-time two-photon interference from distinct molecules on the same chip Rocco Duquennoy, Maja Colautti, Ramin Emadi, Prosenjit Majumder, Pietro Lombardi, and Costanza Toninelli Optica 9(7), 731-737 (2022)  View: HTML | PDF  [Suppl. Mat. (2)] Robust and adaptable quantum key distribution network without trusted nodes Guan-Jie Fan-Yuan, Feng-Yu Lu, Shuang Wang, Zhen-Qiang Yin, De-Yong He, Wei Chen, Zheng Zhou, Ze-Hao Wang, Jun Teng, Guang-Can Guo, and Zheng-Fu Han Optica 9(7), 812-823 (2022)  View: HTML | PDF Í Interference of two-photon transitions induced by XUV light M. Žitnik, A. Mihelič, K. Bučar, Š. Krušič, R. Squibb, R. Feifel, I. Ismail, P. Lablanquie, J. Palaudoux, O. Plekan, M. Di Fraia, M. Coreno, M. Manfredda, A. Simoncig, P. Rebernik Ribič, F. Sottocorona, E. Allaria, K. C. Prince, C. Callegari, and F. Penent Optica 9(7), 692-700 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] Three-dimensional structure determination of gold nanotriangles in solution using X-ray free-electron laser single-particle analysis Miki Nakano, Osamu Miyashita, Yasumasa Joti, Akihiro Suzuki, Hideyuki Mitomo, Yoshiya Niida, Ying Yang, Hirokatsu Yumoto, Takahisa Koyama, Kensuke Tono, Haruhiko Ohashi, Makina Yabashi, Tetsuya Ishikawa, Yoshitaka Bessho, Kuniharu Ijiro, Yoshinori Nishino, and Florence Tama Optica 9(7), 776-784 (2022)  View: HTML | PDF  [Suppl. Mat. (1)] Vol. 9, Iss. 7 -- July 20, 2022 | Comments Í Photonic integrated circuits with bound states in the continuum: comment Jiří Čtyroký and Jiří Petráček Optica 9(7), 681-682 (2022)  View: HTML | PDF Vol. 9, Iss. 7 -- July 20, 2022 | Errata Photonic integrated circuits with bound states in the continuum: erratum Zejie Yu, Xiang Xi, Jingwen Ma, Hon Ki Tsang, Chang-Ling Zou, and Xiankai Sun Optica 9(7), 683-683 (2022)  View: HTML | PDF