Photonic crystal fiber with a flattened fundamental mode for the fiber lasers |
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Authors: | Chun-can Wang Fan Zhang Yu-chun Lu Chu Liu Rui Geng Ti-gang Ning |
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Institution: | Key Lab of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China |
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Abstract: | The 1-hole-missing and 7-hole-missing photonic crystal fibers (PCFs) with flattened fundamental modes (FMs) are proposed by introducing a layer of up-doped silica into the core of the PCFs. The transverse mode competitions are compared between the 7-hole-missing PCF lasers with and without flattened-FMs. The numerical results show that the flattened-FM PCF lasers can support the single transverse mode operation, even for a large value of the ratio of air hole diameter to the spacing between holes (up to 0.53). |
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Keywords: | 42 55 Wd 42 60 Da 42 81 Qb |
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