Lasing in thulium-doped polarizing photonic crystal fiber

Norbert Modsching, Pankaj Kadwani, R. Andrew Sims, Lasse Leick, Lawrence Shah, Jes Broeng, Martin Richardson

Research output: Contribution to journalJournal articleResearchpeer-review


We describe lasing of a thulium-doped polarizing photonic crystal fiber. A 4m long fiber with 50 μm diameter core, 250 μm diameter cladding, and d/A ratio of 0.18 was pumped with a 793nm diode and produced a polarized output with a polarization extinction ratio (PER) of 15 dB and an M2 of <1:15. An intracavity polarizer and half-wave plate minimally increased the PER to 16 dB. The output power had 35% slope efficiency relative to the absorbed pump power. The maximum cw output power was limited to 4W due to the quantum defect heating of the fiber.
Original languageEnglish
JournalOptics Letters
Issue number19
Pages (from-to)3873-3875
Publication statusPublished - 2011
Externally publishedYes

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