Extremely Efficient DFB Lasers with Flat-Top Intra-Cavity Power Distribution in Highly Erbium-Doped Fibers
High-performance erbium-doped DFB fiber lasers are presently required for several sensing applications, whilst the current efficiency record is only a few percent. Additionally, a flat-top intra-cavity power distribution that is not provided in traditional DFB lasers is preferred. Moreover, cavity l...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/3/1398 |
| _version_ | 1797623216183705600 |
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| author | Amirhossein Tehranchi Raman Kashyap |
| author_facet | Amirhossein Tehranchi Raman Kashyap |
| author_sort | Amirhossein Tehranchi |
| collection | DOAJ |
| description | High-performance erbium-doped DFB fiber lasers are presently required for several sensing applications, whilst the current efficiency record is only a few percent. Additionally, a flat-top intra-cavity power distribution that is not provided in traditional DFB lasers is preferred. Moreover, cavity lengths of <20 cm are attractive for fabrication and packaging. These goals can be achieved using highly erbium-doped fiber (i.e., 110 dB/m absorption at 1530 nm), providing high gain with proper engineering of coupling coefficients. In this paper, for a given background fiber loss, first the optimum intra-cavity signal powers for various pump powers are numerically calculated. Then, for a fully unidirectional laser, optimum coupling profiles are determined. Design diagrams, including contour maps for optimum cavity lengths, maximum output powers, maximum intra-cavity signal powers, and quality factors considering various pump powers and background fiber losses, are presented. The laser pump and intra-cavity signal distribution are also calculated for a realistic, feasible modified coupling profile considering a strong unidirectionality. The DFB laser is finally simulated using generalized coupled-mode equations for such modified profiles. The efficiency of more than 22% can be realized, which is the highest reported for DFB lasers based only on erbium-doped fiber. |
| first_indexed | 2024-03-11T09:25:31Z |
| format | Article |
| id | doaj.art-ac8ac978ab1e4ce88a216ef197605671 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T09:25:31Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj.art-ac8ac978ab1e4ce88a216ef1976056712023-11-16T18:00:27ZengMDPI AGSensors1424-82202023-01-01233139810.3390/s23031398Extremely Efficient DFB Lasers with Flat-Top Intra-Cavity Power Distribution in Highly Erbium-Doped FibersAmirhossein Tehranchi0Raman Kashyap1Department of Electrical Engineering, Polytechnique Montreal, University of Montreal, Montreal, QC H3C 3A7, CanadaDepartment of Electrical Engineering, Polytechnique Montreal, University of Montreal, Montreal, QC H3C 3A7, CanadaHigh-performance erbium-doped DFB fiber lasers are presently required for several sensing applications, whilst the current efficiency record is only a few percent. Additionally, a flat-top intra-cavity power distribution that is not provided in traditional DFB lasers is preferred. Moreover, cavity lengths of <20 cm are attractive for fabrication and packaging. These goals can be achieved using highly erbium-doped fiber (i.e., 110 dB/m absorption at 1530 nm), providing high gain with proper engineering of coupling coefficients. In this paper, for a given background fiber loss, first the optimum intra-cavity signal powers for various pump powers are numerically calculated. Then, for a fully unidirectional laser, optimum coupling profiles are determined. Design diagrams, including contour maps for optimum cavity lengths, maximum output powers, maximum intra-cavity signal powers, and quality factors considering various pump powers and background fiber losses, are presented. The laser pump and intra-cavity signal distribution are also calculated for a realistic, feasible modified coupling profile considering a strong unidirectionality. The DFB laser is finally simulated using generalized coupled-mode equations for such modified profiles. The efficiency of more than 22% can be realized, which is the highest reported for DFB lasers based only on erbium-doped fiber.https://www.mdpi.com/1424-8220/23/3/1398distributed feedback laserfiber laserfiber Bragg grating |
| spellingShingle | Amirhossein Tehranchi Raman Kashyap Extremely Efficient DFB Lasers with Flat-Top Intra-Cavity Power Distribution in Highly Erbium-Doped Fibers Sensors distributed feedback laser fiber laser fiber Bragg grating |
| title | Extremely Efficient DFB Lasers with Flat-Top Intra-Cavity Power Distribution in Highly Erbium-Doped Fibers |
| title_full | Extremely Efficient DFB Lasers with Flat-Top Intra-Cavity Power Distribution in Highly Erbium-Doped Fibers |
| title_fullStr | Extremely Efficient DFB Lasers with Flat-Top Intra-Cavity Power Distribution in Highly Erbium-Doped Fibers |
| title_full_unstemmed | Extremely Efficient DFB Lasers with Flat-Top Intra-Cavity Power Distribution in Highly Erbium-Doped Fibers |
| title_short | Extremely Efficient DFB Lasers with Flat-Top Intra-Cavity Power Distribution in Highly Erbium-Doped Fibers |
| title_sort | extremely efficient dfb lasers with flat top intra cavity power distribution in highly erbium doped fibers |
| topic | distributed feedback laser fiber laser fiber Bragg grating |
| url | https://www.mdpi.com/1424-8220/23/3/1398 |
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