Self-starting passively mode-locked all fiber laser based on carbon nanotubes with radially polarized emission-中国期刊网

摘要 Wedemonstrateanallfiberpassivelymode-lockedlaseremittingaradiallypolarizedbeambyusingafew-modefiberBragggratingtoachievemodeselectionandspectrumfiltering.Anoffsetsplicingofsingle-modefiberwithfour-modefiberisutilizedasamodecouplerinthelasercavity.Carbonnanotubesareintroducedintothelasercavityasthesaturableabsorbertoachieveself-startmodelocking.Thelaseroperatesat1547.5nmwithanarrowspectrumwidthof0.3nmat30dB.Theemittedmode-lockedpulseshaveadurationof22.73psandrepetitionof10.61MHz.Aradiallypolarizedbeamhasbeenobtainedwithhighmodepuritybyadjustingthepolarizationinthelasercavity.

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Self-starting passively mode-locked all fiber laser based on carbon nanotubes with radially polarized emission

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Self-starting passively mode-locked all fiber laser based on carbon nanotubes with radially polarized emission

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