Half-watt Tm3+−Doped Fluoride Fiber Laser at 785 nm

Masoud Mollaee, Xiushan Zhu, Jie Zong, Kort Wiersma, Arturo Chavez-Pirson, Robert A Norwood, Nasser N Peyghambarian

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

All-fiber single-transverse-mode laser oscillators operating at 785 nm were demonstrated by splicing a 0.1 mol% Tm3+−doped fluoride fiber with a core diameter of 4 μm and a numerical aperture of 0.07 to a pair of silica fiber Bragg gratings. About 500 mW of continuous-wave single transverse mode laser output at 784.5 nm with a 3-dB spectral bandwidth of 0.2 nm was obtained by upconversion pumping a 3-m-long gain fiber at 1125 nm. Our experiments show that the ground-state absorption of Tm3+ at 785 nm is the origin of low efficiency in previous reports. The efficiency of this all-fiber laser can be improved by using a gain fiber with optimized overlap between the laser, the pump and the fiber core, and employing new pumping schemes that deplete the ground state sufficiently.

Original languageEnglish (US)
JournalIEEE Photonics Technology Letters
DOIs
StateAccepted/In press - Aug 1 2018

Fingerprint

Fiber lasers
Fluorides
fiber lasers
fluorides
fibers
Fibers
Ground state
Lasers
pumping
Fiber Bragg gratings
Single mode fibers
Laser modes
Silicon Dioxide
splicing
ground state
Silica
laser modes
Pumps
numerical aperture
laser outputs

Keywords

  • Fiber lasers
  • Fiber optics
  • Thulium
  • Upconversion
  • ZBLAN

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Half-watt Tm3+−Doped Fluoride Fiber Laser at 785 nm. / Mollaee, Masoud; Zhu, Xiushan; Zong, Jie; Wiersma, Kort; Chavez-Pirson, Arturo; Norwood, Robert A; Peyghambarian, Nasser N.

In: IEEE Photonics Technology Letters, 01.08.2018.

Research output: Contribution to journalArticle

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AU - Wiersma, Kort

AU - Chavez-Pirson, Arturo

AU - Norwood, Robert A

AU - Peyghambarian, Nasser N

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N2 - All-fiber single-transverse-mode laser oscillators operating at 785 nm were demonstrated by splicing a 0.1 mol% Tm3+−doped fluoride fiber with a core diameter of 4 μm and a numerical aperture of 0.07 to a pair of silica fiber Bragg gratings. About 500 mW of continuous-wave single transverse mode laser output at 784.5 nm with a 3-dB spectral bandwidth of 0.2 nm was obtained by upconversion pumping a 3-m-long gain fiber at 1125 nm. Our experiments show that the ground-state absorption of Tm3+ at 785 nm is the origin of low efficiency in previous reports. The efficiency of this all-fiber laser can be improved by using a gain fiber with optimized overlap between the laser, the pump and the fiber core, and employing new pumping schemes that deplete the ground state sufficiently.

AB - All-fiber single-transverse-mode laser oscillators operating at 785 nm were demonstrated by splicing a 0.1 mol% Tm3+−doped fluoride fiber with a core diameter of 4 μm and a numerical aperture of 0.07 to a pair of silica fiber Bragg gratings. About 500 mW of continuous-wave single transverse mode laser output at 784.5 nm with a 3-dB spectral bandwidth of 0.2 nm was obtained by upconversion pumping a 3-m-long gain fiber at 1125 nm. Our experiments show that the ground-state absorption of Tm3+ at 785 nm is the origin of low efficiency in previous reports. The efficiency of this all-fiber laser can be improved by using a gain fiber with optimized overlap between the laser, the pump and the fiber core, and employing new pumping schemes that deplete the ground state sufficiently.

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