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240509s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202404493
|2 doi
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|a pubmed25n1239.xml
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|a (DE-627)NLM372069576
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|a (NLM)38718355
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Chen, Daoyuan
|e verfasserin
|4 aut
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| 245 |
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|a 3D Laser Writing of Low-Loss Cross-Section-Variable Type-I Optical Waveguide Passive/Active Integrated Devices in Single Crystals
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 08.08.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2024 Wiley‐VCH GmbH.
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|a Optical waveguides fabricated in single crystals offer crucial passive/active optical components for photonic integrated circuits. Single crystals possess inherent advantages over their amorphous counterpart, such as lower optical losses in visible-to-mid-infrared band, larger peak emission cross-section, higher doping concentration. However, the writing of Type-I positive refractive index modified waveguides in single crystals using femtosecond laser technology presents significant challenges. Herein, this work introduces a novel femtosecond laser direct writing technique that combines slit-shaping with an immersion oil objective to fabricate low-loss Type-I waveguides in single crystals. This approach allows for precise control of waveguide shape, size, mode-field, and refractive index distribution, with a spatial resolution as high as 700 nm and a high positive refractive index variation on the order of 10-2, introducing new degrees of freedom to design and fabricate passive/active optical waveguide devices. As a proof-of-concept, this work successfully produces a 7 mm-long circular-shaped gain waveguide (≈10 µm in diameter) in an Er3+-doped YAG single crystal, exhibiting a propagation loss as low as 0.23 dB cm-1, a net gain of ≈3 dB and a polarization-insensitive character. The newly-developed technique is theoretically applicable to arbitrary single crystals, holding promising potential for various applications in integrated optics, optical communication, and photonic quantum circuits
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|a Journal Article
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|a 3D laser writing
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|a passive/active waveguide devices
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|a single crystal
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|a sub‐µm resolution
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|a type‐I optical waveguide
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| 700 |
1 |
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|a Chen, Zhi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yang, Yi
|e verfasserin
|4 aut
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|a Wang, Yuying
|e verfasserin
|4 aut
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|a Han, Xuhu
|e verfasserin
|4 aut
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|a Lau, Kuen Yao
|e verfasserin
|4 aut
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|a Wu, Zhemin
|e verfasserin
|4 aut
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1 |
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|a Zou, Chen
|e verfasserin
|4 aut
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|a Zhang, Yu
|e verfasserin
|4 aut
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|a Xu, Beibei
|e verfasserin
|4 aut
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|a Liu, Xiaofeng
|e verfasserin
|4 aut
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|a Ma, Zhijun
|e verfasserin
|4 aut
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|a Dong, Guoping
|e verfasserin
|4 aut
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|a Barillaro, Giuseppe
|e verfasserin
|4 aut
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|a Zhong, Lijing
|e verfasserin
|4 aut
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|a Qiu, Jianrong
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 32 vom: 22. Aug., Seite e2404493
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
1 |
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|g volume:36
|g year:2024
|g number:32
|g day:22
|g month:08
|g pages:e2404493
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|u http://dx.doi.org/10.1002/adma.202404493
|3 Volltext
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