Q-switched dual-wavelength pumped 3.5-μm erbium-doped mid-Infrared fiber laser

Nathaniel Bawden, Hiraku Matsukuma, Ori Henderson-Sapir, Elizaveta Klantsataya, Shigeki Tokita, David J. Ottaway

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


Short pulse operation of fiber lasers operating at wavelengths up 3 micron have been reported in recent years. At longer wavelengths, fiber lasers have only been demonstrated with a continuous operation mode. Short pulse operation in the mid-IR is necessary for utilizing such lasers in laser radars and for medical applications. Our previous numerical work suggested that Q-switching is possible on the 3.5 μm transition in erbium-doped ZBLAN in a similar manner to work demonstrated on the 2.8 μm transition in erbium. In this work we report on initial experimental results of a Q-switched, dualwavelength pumped fiber laser operating on the 3.5 μm transition in erbium-doped ZBLAN glass fibers. Using a hybrid fiber and open resonator configuration utilizing an acousto-optic modulator we demonstrated stable single pulse Q-switching while operating at repetition rates of 20 kHz and up to 120 kHz. The laser achieved a peak power of 8 W with pulse energy of 7 μJ while operating at 25 kHz. Long pulse widths on the order of 1 μs were obtained. The low peak power and long pulses are likely the result of both low gain of the transition and additional losses in the resonator which are currently being investigated. Our latest results will be presented.

Original languageEnglish
Title of host publicationFiber Lasers XV
Subtitle of host publicationTechnology and Systems
EditorsIngmar Hartl, Adrian L. Carter
ISBN (Electronic)9781510615090
Publication statusPublished - 2018
Externally publishedYes
EventFiber Lasers XV: Technology and Systems 2018 - San Francisco, United States
Duration: 2018 Jan 292018 Feb 1

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherFiber Lasers XV: Technology and Systems 2018
Country/TerritoryUnited States
CitySan Francisco


  • 3.5 micron
  • Dual wavelength pumping
  • Erbium
  • Fiber-laser
  • Mid-IR
  • Q-switching

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Q-switched dual-wavelength pumped 3.5-μm erbium-doped mid-Infrared fiber laser'. Together they form a unique fingerprint.

Cite this