Optics Letters
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#1Anneshwa Dey (ANU: Australian National University)
#2Ya Zhang (ANU: Australian National University)H-Index: 2
Last. Jong H. Chow (ANU: Australian National University)H-Index: 86
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We demonstrate the algebraic cancellation of residual phase cross talk in digitally enhanced heterodyne interferometry (DEHeI), a code division multiplexing technique for interferometric sensing. By using linear combinations of parallel decoding operations at multiple delays, we synthesize a zero correlation for spurious signals and remove phase cross talk: a method we call offset decoding. We experimentally demonstrate 70 dB of signal isolation and over 40 dB greater isolation than the equivale...
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#1J. A. Sarabia-Alonso (INAOE: National Institute of Astrophysics, Optics and Electronics)H-Index: 2
#2J. G. Ortega-Mendoza (PUPR: Polytechnic University of Puerto Rico)H-Index: 6
Last. Ruben Ramos-Garcia (INAOE: National Institute of Astrophysics, Optics and Electronics)H-Index: 17
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In this Letter, we show 3D steady-state trapping and manipulation of vapor bubbles in liquids employing a low-power continuous-wave laser using the Marangoni effect. Light absorption from photodeposited silver nanoparticles on the distal end of a multi-mode optical fiber is used to produce bubbles of different diameters. The thermal effects produced by either the nanoparticles on the fiber tip or the light bulk absorption modulate the surface tension of the bubble wall and creates both longitudi...
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#1Sen Zheng (CQUPT: Chongqing University of Posts and Telecommunications)
#2Honggang Hao (CQUPT: Chongqing University of Posts and Telecommunications)
Last. Xuehong Ran (CQUPT: Chongqing University of Posts and Telecommunications)
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In this Letter, we propose an approach to generate high-purity orbital angular momentum (OAM) vortex waves using an amplitude-and-phase metasurface (APM). By varying the square split ring opening and orientation angles, the cross-polarized reflection response of the proposed structure can yield full phase and amplitude coverage. Based on the traditional phase-only metasurface (POM), the Chebyshev synthesis method (CSM) is applied to array the metasurface amplitude distribution. Metasurfaces with...
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#1Xigogang Wang (ZUST: Zhejiang University of Science and Technology)
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Vulnerability analysis of optical encryption schemes using deep learning (DL) has recently become of interest to many researchers. However, very few works have paid attention to the design of optical encryption systems using DL. Here we report on the combination of the holographic method and DL technique for optical encryption, wherein a secret image is encrypted into a synthetic phase computer-generated hologram (CGH) by using a hybrid non-iterative procedure. In order to increase the level of ...
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#1Yuanshuo Bai (SJTU: Shanghai Jiao Tong University)H-Index: 2
#2Weilin Xie (BIT: Beijing Institute of Technology)H-Index: 10
Last. Yi Dong (BIT: Beijing Institute of Technology)H-Index: 4
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We present a remote Michelson interferometric phase sensor based on dual-core fiber transmission and linear phase demodulation. The former allows for synchronous transmission of both sensing signal and reference lights, enabling efficient suppression for the environmental disturbances along the transmission link and for the incoherent phase noise between the two lights. The latter is conducted by two optical phase-locked loops, one of which consists of a fiber stretcher that is used to eliminate...
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#1Duan Mingliang (NUST: Nanjing University of Science and Technology)H-Index: 2
#2Jianxin Li (NUST: Nanjing University of Science and Technology)H-Index: 6
Last. Guo Renhui (NUST: Nanjing University of Science and Technology)H-Index: 2
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The growing interest in microprofile measurements for advanced semiconductor manufacturing and electronic glass screens has stimulated the demand for in situ dynamic white-light interferometry (DWLI). However, it is challenging to perform vibration-insensitive measurements because of the broad-spectrum interference. In this Letter, we report a vertical scanning DWLI using multiwavelength tilt iteration and sliding local least squares. Numerical simulations and comparative experiments were conduc...
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#1Lu Rong (Beijing University of Technology)H-Index: 15
#2Shiyu Wang (Beijing University of Technology)H-Index: 1
Last. Yunxin Wang (Beijing University of Technology)H-Index: 11
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Terahertz (THz) phase imaging is widely spreading in various scenarios, among which full-field phase distributions are commonly retrieved by digital holography or ptychography. In this Letter, the transport of the intensity equation reconstruction method is applied into the THz band. An algorithm named the lensless US-transport of intensity equation (TIE) is proposed to accommodate to an in-line configuration. The object phase is retrieved by primarily conducting iterations between the axial int...
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#2Christian RohrerH-Index: 15
Last. Marwan Abdou AhmedH-Index: 21
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#2Qingwen LiuH-Index: 17
Last. Junyong ZhangH-Index: 7
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