Results 81 to 90 of about 2,250,517 (282)

Multi-segment coherent beam combining [PDF]

, 1994
Scaling laser systems to large sizes for power beaming and other applications can sometimes be simplified by combing a number of smaller lasers. However, to fully utilize this scaling, coherent beam combination is necessary.
Tucker, S.D., Gruetzner, J.K., Smith, T.G., Rosenthal, R.R., Warren, M.E., Bentley, A.E., Neal, D.R., Morgan, R.   +7 more
core  

Coordinated Architectural and Chemical Reinforcement in the Crushing Mandible of a Soldier Termite

Advanced Functional Materials, EarlyView.
The crushing mandible of a soldier termite withstands substantial biting loads despite lacking mineral. Its cuticle is partitioned: convex teeth pair hardness and zinc enrichment with aligned chitin fibers for contact durability, while stiffer concave regions between teeth carry bending loads.
Andrew Tran Nguyen, Patryk Wąsik, Juan Fernando Cucuyame Morales, Marie Kate Palau, Adrian Francisco Duran Ornelas, Phani Saketh Dasika, Jin Hee Kim, Radhika Laxminarayana, Eric Hintsala, Greta Chang, Junzhi Liao, Lizhi Sun, Nathan Lord, Atsushi Arakaki, Paul Bardunias, Pablo Zavattieri, David Kisailus   +16 more
wiley   +1 more source

Neural network enabled common-path phase locking for filled-aperture coherent beam combining

High Power Laser Science and Engineering
Deep learning (DL) has been applied to phase control in coherent beam combining (CBC) recently. However, existing DL-based approaches for filled-aperture CBC essentially convert the phase-locking path into tiled-aperture schemes.
Yousi Yang, Yijie Zhang, Dan Li, Ping Yan, Qiang Liu, Qirong Xiao   +5 more
doaj   +1 more source

Experimental optimization of orbital angular momentum beams generated by coherent beam combining digital laser

, 2023
International audienceWe experimentally implemented a genetic algorithm to improve the uniformity of a Laguerre-Gaussian beam generated with a 61-channels coherent beam combining digital ...
Ranély-Vergé-Dépré, Claude-Alban, Burger, Miloš, Fsaifes, Ihsan, Jovanovic, Igor, Chanteloup, Jean-Christophe, Becheker, Rezki   +5 more
core   +1 more source

2D Co‐Assembly of Solid Acids Enables Stable Superprotonic Conduction Above 260°C

Advanced Functional Materials, EarlyView.
A two‐dimensional co‐assembly strategy integrates antimony phosphate and phosphotungstic acid nanosheets into free‐standing inorganic lamellar membranes with confined acid–acid interfaces. The resulting interfacial hydrogen‐bond network enables anhydrous proton conductivity exceeding 0.1 S cm−1 at 260°C and supports stable high‐temperature fuel‐cell ...
Qiuning Li, Kaiqiang He, Dehua Dong, Fanmengjing Wang, Xiangcheng Liu, Zhikao Li, Jacek J. Jasieniak, Paul A. Webley, Huanting Wang   +8 more
wiley   +1 more source

Coherent optical binary polarisation shift keying heterodyne system in the free-space optical turbulence channel [PDF]

, 2011
In this paper, analytical and simulation results for the bit error rate (BER) performance and fading penalty of a coherent optical binary polarization shift keying (2PolSK) heterodyne system adopted for a free space optical (FSO) communication link ...
Z. Ghassemlooy, Tang, Xuan, S. Rajbhandari, Lee , Chung Ghiu, Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, W.O. Popoola, C.G. Lee, Popoola, Wasiu O., Rajbhandari, Sujan, Lee, Chung Ghiu, X. Tang, Ghassemlooy , Zabih   +12 more
core   +1 more source

Chitin‐Derived Carbon‐Metal Functional Materials

Advanced Functional Materials, EarlyView.
Functional carbon materials are synthesized from combination of biopolymer (chitin) and iron precursors. The resultant material exhibits superior surface area and adsorptive properties compared to carbon materials synthesized directly from pure chitin.
Herry Fang, Chao Hsuan (Joseph) Sung, Haitao Yu, Ezra Sarmiento, Katarina Kotanchek, Ryan Christopher Lee, Michelle Chan, David Kisailus   +7 more
wiley   +1 more source

Discovery of Energy‐Localized Trap States via Opto‐Electrical Spectroscopy in UWBG Perovskite La:SrSnO3 FETs

Advanced Functional Materials, EarlyView.
Combined UV–vis transmittance and wavelength‐dependent photo‐assisted DC I–V analyses reveal defect‐induced optical instability and a high density of deep donor‐like subgap traps in La‐doped SrSnO3. The resulting MOSFET achieves one of the highest on/off ratios reported for ABO3 perovskite devices, demonstrating the promise of stannate perovskites as ...
Sojin Jung, Junghyun Koo, Hongseung Lee, Donghwan Kim, Dongho Won, Weideng Sun, Jaewook Yoo, Minah Park, Seohyeon Park, Seongbin Lim, Joonsung Lee, Sungjune Park, Sangmoon Yoon, Tae Wan Kim, Bharat Jalan, Gang Qiu, Kiyoung Lee, Hagyoul Bae   +17 more
wiley   +1 more source

Spatio-spectral 4D coherent ranging using a flutter-wavelength-swept laser

Nature Communications
Coherent light detection and ranging (LiDAR), particularly the frequency-modulated continuous-wave LiDAR, is a robust optical imaging technology for measuring long-range distance and velocity in three dimensions (3D).
Dawoon Jeong, Hansol Jang, Min Uk Jung, Taeho Jeong, Hyunsoo Kim, Sanghyeok Yang, Janghyeon Lee, Chang-Seok Kim   +7 more
doaj   +1 more source

Study on Phase and Tip-tilt Control Using Adaptive SPGD Algorithm for Coherent Beam Combining [PDF]

한국정밀공학회지
Coherent Beam Combining (CBC) is a promising technique for enhancing laser output power by accurately aligning the phase and position of multiple laser beams.
Hyeong Min Yoon, Sangmin Lee, Jae Woo Jung, Kang Hee Lee, Jae Heon Jung, Chang Hwan Kim, Byunghyuck Moon, Eunji Park, Ki Hyuck Kim, Seongmook Jeong, Jun Young Yoon   +10 more
doaj   +1 more source