Optimization of single-mode sapphire waveguide Bragg gratings
We demonstrate the fabrication and optimization of waveguide Bragg gratings on single-crystal sapphire substrates using femtosecond laser direct writing. The gratings are fabricated using modulated bursts and are embedded inside single-mode depressed cladding waveguides. Through design optimization,...
| मुख्य लेखकों: | , , , , , , , , |
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| स्वरूप: | Journal article |
| भाषा: | English |
| प्रकाशित: |
IEEE
2024
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| _version_ | 1826315353933742080 |
|---|---|
| author | Wang, M Salter, PS Payne, FP Liu, T Shipley, A Song, Z Morris, SM Booth, MJ Fells, JAJ |
| author_facet | Wang, M Salter, PS Payne, FP Liu, T Shipley, A Song, Z Morris, SM Booth, MJ Fells, JAJ |
| author_sort | Wang, M |
| collection | OXFORD |
| description | We demonstrate the fabrication and optimization of waveguide Bragg gratings on single-crystal sapphire substrates using femtosecond laser direct writing. The gratings are fabricated using modulated bursts and are embedded inside single-mode depressed cladding waveguides. Through design optimization, and fabrication parameter tuning, a depressed cladding waveguide with a loss of ∼0.8 dB/cm and a Bragg grating with a reflectivity of higher than 90% in the telecommunications wavelength band are demonstrated. The waveguide Bragg grating exhibits stable thermal properties under annealing at 1200°C. A sampled grating and a grating array are also demonstrated, showing the potential for more complex grating designs. |
| first_indexed | 2024-09-25T04:05:27Z |
| format | Journal article |
| id | oxford-uuid:91f898a2-d893-42ac-95fa-2bd3925a8893 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-12-09T03:24:04Z |
| publishDate | 2024 |
| publisher | IEEE |
| record_format | dspace |
| spelling | oxford-uuid:91f898a2-d893-42ac-95fa-2bd3925a88932024-11-25T10:17:09ZOptimization of single-mode sapphire waveguide Bragg gratingsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:91f898a2-d893-42ac-95fa-2bd3925a8893EnglishSymplectic ElementsIEEE2024Wang, MSalter, PSPayne, FPLiu, TShipley, ASong, ZMorris, SMBooth, MJFells, JAJWe demonstrate the fabrication and optimization of waveguide Bragg gratings on single-crystal sapphire substrates using femtosecond laser direct writing. The gratings are fabricated using modulated bursts and are embedded inside single-mode depressed cladding waveguides. Through design optimization, and fabrication parameter tuning, a depressed cladding waveguide with a loss of ∼0.8 dB/cm and a Bragg grating with a reflectivity of higher than 90% in the telecommunications wavelength band are demonstrated. The waveguide Bragg grating exhibits stable thermal properties under annealing at 1200°C. A sampled grating and a grating array are also demonstrated, showing the potential for more complex grating designs. |
| spellingShingle | Wang, M Salter, PS Payne, FP Liu, T Shipley, A Song, Z Morris, SM Booth, MJ Fells, JAJ Optimization of single-mode sapphire waveguide Bragg gratings |
| title | Optimization of single-mode sapphire waveguide Bragg gratings |
| title_full | Optimization of single-mode sapphire waveguide Bragg gratings |
| title_fullStr | Optimization of single-mode sapphire waveguide Bragg gratings |
| title_full_unstemmed | Optimization of single-mode sapphire waveguide Bragg gratings |
| title_short | Optimization of single-mode sapphire waveguide Bragg gratings |
| title_sort | optimization of single mode sapphire waveguide bragg gratings |
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