Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber Coating
We propose a point-by-point inscription method for fiber Bragg grating (FBG) fabrication using a femtosecond pulsed laser focused through a fiber polyimide coating, realizing a 2-<italic>μ</italic>m-wavelength-band FBG. A femtosecond laser acts as the inscription laser, focuse...
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8539990/ |
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| author | Wei He Lianqing Zhu Wen Zhang Feng Liu Mingli Dong |
| author_facet | Wei He Lianqing Zhu Wen Zhang Feng Liu Mingli Dong |
| author_sort | Wei He |
| collection | DOAJ |
| description | We propose a point-by-point inscription method for fiber Bragg grating (FBG) fabrication using a femtosecond pulsed laser focused through a fiber polyimide coating, realizing a 2-<italic>μ</italic>m-wavelength-band FBG. A femtosecond laser acts as the inscription laser, focused by a 63× oil lens. A first-order FBG was fabricated with a grating interval of 700 nm. The 15-<italic>μ</italic>W pulsed laser was focused directly on the fiber core through the polyimide coating and cladding. A first-order FBG for 2004.8-nm light with more than 56% reflectances was fabricated. High wavelength sensitivity and linearity of the FBG were demonstrated by temperature and strain-sensing testing. The first-order FBG of 2004.8 and 2000.2 nm resonant wavelengths could be realized simultaneously through parallel inscription method in 3000 <italic>μ</italic>m long grating area. |
| format | Article |
| id | doaj-art-01a5891972e645858d006e2f5bacaddf |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-01a5891972e645858d006e2f5bacaddf2025-08-20T03:32:50ZengIEEEIEEE Photonics Journal1943-06552019-01-011111810.1109/JPHOT.2018.28814378539990Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber CoatingWei He0https://orcid.org/0000-0002-8543-4371Lianqing Zhu1Wen Zhang2Feng Liu3Mingli Dong4Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Overseas Expertise Introduction Center for Discipline Innovation (111 Center), Beijing Information Science and Technology University, Beijing, ChinaKey Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Overseas Expertise Introduction Center for Discipline Innovation (111 Center), Beijing Information Science and Technology University, Beijing, ChinaKey Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Overseas Expertise Introduction Center for Discipline Innovation (111 Center), Beijing Information Science and Technology University, Beijing, ChinaKey Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Overseas Expertise Introduction Center for Discipline Innovation (111 Center), Beijing Information Science and Technology University, Beijing, ChinaKey Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Overseas Expertise Introduction Center for Discipline Innovation (111 Center), Beijing Information Science and Technology University, Beijing, ChinaWe propose a point-by-point inscription method for fiber Bragg grating (FBG) fabrication using a femtosecond pulsed laser focused through a fiber polyimide coating, realizing a 2-<italic>μ</italic>m-wavelength-band FBG. A femtosecond laser acts as the inscription laser, focused by a 63× oil lens. A first-order FBG was fabricated with a grating interval of 700 nm. The 15-<italic>μ</italic>W pulsed laser was focused directly on the fiber core through the polyimide coating and cladding. A first-order FBG for 2004.8-nm light with more than 56% reflectances was fabricated. High wavelength sensitivity and linearity of the FBG were demonstrated by temperature and strain-sensing testing. The first-order FBG of 2004.8 and 2000.2 nm resonant wavelengths could be realized simultaneously through parallel inscription method in 3000 <italic>μ</italic>m long grating area.https://ieeexplore.ieee.org/document/8539990/Femtosecond pulsed lasererbium-doped fiber laserfiber Bragg grating2-μm-wavelength-band |
| spellingShingle | Wei He Lianqing Zhu Wen Zhang Feng Liu Mingli Dong Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber Coating IEEE Photonics Journal Femtosecond pulsed laser erbium-doped fiber laser fiber Bragg grating 2-μm-wavelength-band |
| title | Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber Coating |
| title_full | Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber Coating |
| title_fullStr | Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber Coating |
| title_full_unstemmed | Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber Coating |
| title_short | Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber Coating |
| title_sort | point by point femtosecond laser inscription of 2 italic x03bc italic m wavelength band fbg through fiber coating |
| topic | Femtosecond pulsed laser erbium-doped fiber laser fiber Bragg grating 2-μm-wavelength-band |
| url | https://ieeexplore.ieee.org/document/8539990/ |
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