In-fiber polarizer based on a 45-degree tilted fluoride fiber Bragg grating for mid-infrared fiber laser technology

Gayathri Bharathan, Darren D. Hudson, Robert Woodward, Stuart D. Jackson, Alex Fuerbach

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We report the direct femtosecond laser inscription of a 45 degrees tilted fiber Bragg grating (TFBG) into fluoride fiber, creating an in-fiber mid-infrared polarizer. Utilizing a 16 mm long intracavity TFBG, we demonstrate a 2.862 mu m Ho3+Pr3+:ZBLAN fiber laser with 21.6 dB output polarization extinction ratio (PER), up to 0.37 W output power and 31.3% slope efficiency. In addition, we experimentally demonstrate that the laser PER is a linear function of grating length. Our results show that fluoride TFBGs are a promising route to replace bulk polarizers in mid-IR laser cavities, paving the way to all-fiber mid-infrared laser systems.

LanguageEnglish
Pages56-63
Number of pages8
JournalOSA Continuum
Volume1
Issue number1
DOIs
Publication statusPublished - 15 Sep 2018

Cite this

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title = "In-fiber polarizer based on a 45-degree tilted fluoride fiber Bragg grating for mid-infrared fiber laser technology",
abstract = "We report the direct femtosecond laser inscription of a 45 degrees tilted fiber Bragg grating (TFBG) into fluoride fiber, creating an in-fiber mid-infrared polarizer. Utilizing a 16 mm long intracavity TFBG, we demonstrate a 2.862 mu m Ho3+Pr3+:ZBLAN fiber laser with 21.6 dB output polarization extinction ratio (PER), up to 0.37 W output power and 31.3{\%} slope efficiency. In addition, we experimentally demonstrate that the laser PER is a linear function of grating length. Our results show that fluoride TFBGs are a promising route to replace bulk polarizers in mid-IR laser cavities, paving the way to all-fiber mid-infrared laser systems.",
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In-fiber polarizer based on a 45-degree tilted fluoride fiber Bragg grating for mid-infrared fiber laser technology. / Bharathan, Gayathri; Hudson, Darren D.; Woodward, Robert; Jackson, Stuart D.; Fuerbach, Alex.

In: OSA Continuum, Vol. 1, No. 1, 15.09.2018, p. 56-63.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Bharathan, Gayathri

AU - Hudson, Darren D.

AU - Woodward, Robert

AU - Jackson, Stuart D.

AU - Fuerbach, Alex

PY - 2018/9/15

Y1 - 2018/9/15

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AB - We report the direct femtosecond laser inscription of a 45 degrees tilted fiber Bragg grating (TFBG) into fluoride fiber, creating an in-fiber mid-infrared polarizer. Utilizing a 16 mm long intracavity TFBG, we demonstrate a 2.862 mu m Ho3+Pr3+:ZBLAN fiber laser with 21.6 dB output polarization extinction ratio (PER), up to 0.37 W output power and 31.3% slope efficiency. In addition, we experimentally demonstrate that the laser PER is a linear function of grating length. Our results show that fluoride TFBGs are a promising route to replace bulk polarizers in mid-IR laser cavities, paving the way to all-fiber mid-infrared laser systems.

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