5kW Near-diffraction-limited and 8kW High-brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes

Qiang Fang, Jinhui Li, Wei Shi, Yuguo Qin, Yang Xu, Xiangjie Meng, R. A. Norwood, N. Peyghambarian

Research output: Research - peer-reviewArticle

Abstract

LanguageEnglish (US)
JournalIEEE Photonics Journal
DOIs
StateAccepted/In press - Sep 1 2017

Fingerprint

continuous wave lasers
fiber lasers
brightness
semiconductor lasers
diffraction
Continuous wave lasers
Fiber lasers
Semiconductor lasers
Luminance
Diffraction
fibers
lasers
Lasers
amplifiers
Fiber amplifiers
oscillators
pumps
slopes
Beam quality
Pumps

Keywords

  • diode-pumped lasers
  • Fiber lasers
  • fiber lasers
  • high power
  • Laser excitation
  • near-diffraction-limited
  • Optical fiber amplifiers
  • Power lasers
  • Pump lasers
  • Semiconductor lasers
  • ytterbium-doped

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

5kW Near-diffraction-limited and 8kW High-brightness Monolithic Continuous Wave Fiber Lasers Directly Pumped by Laser Diodes. / Fang, Qiang; Li, Jinhui; Shi, Wei; Qin, Yuguo; Xu, Yang; Meng, Xiangjie; Norwood, R. A.; Peyghambarian, N.

In: IEEE Photonics Journal, 01.09.2017.

Research output: Research - peer-reviewArticle

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abstract = "Tandem pumping technique are traditionally adopted to develop >3kW continuous-wave (cw) Yb3+-doped fiber lasers, which are usually pumped by other fiber lasers at shorter wavelengths (1018 nm e.g.). Fiber lasers directly pumped by laser diodes have higher wall-plug efficiency and are more compact. Here, we report two high brightness monolithic cw fiber laser sources at 1080 nm. Both lasers consist of a cw fiber laser oscillator and one laser-diode pumped double cladding (DC) fiber amplifier in the master oscillator-power amplifier (MOPA) configuration. One laser, using 30 μm-core Yb3+-doped fiber as the gain medium, can produce >5 kW average laser power with near diffraction-limited beam quality (M2<1.8). The slope efficiency of the fiber amplifier with respect to the launched pump power reached 86.5%. The other laser utilized 50 μm-core Yb3+-doped fiber as the gain medium and produced >8 kW average laser power with high beam quality (M2:~4). The slope efficiency of the fiber amplifier with respect to the launched pump power reach 83%. To the best of our knowledge, this is the first detailed report for >5 kW near-diffraction-limited and >8 kW high-brightness monolithic fiber lasers directly pumped by laser diodes.",
keywords = "diode-pumped lasers, Fiber lasers, fiber lasers, high power, Laser excitation, near-diffraction-limited, Optical fiber amplifiers, Power lasers, Pump lasers, Semiconductor lasers, ytterbium-doped",
author = "Qiang Fang and Jinhui Li and Wei Shi and Yuguo Qin and Yang Xu and Xiangjie Meng and Norwood, {R. A.} and N. Peyghambarian",
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AU - Fang,Qiang

AU - Li,Jinhui

AU - Shi,Wei

AU - Qin,Yuguo

AU - Xu,Yang

AU - Meng,Xiangjie

AU - Norwood,R. A.

AU - Peyghambarian,N.

PY - 2017/9/1

Y1 - 2017/9/1

N2 - Tandem pumping technique are traditionally adopted to develop >3kW continuous-wave (cw) Yb3+-doped fiber lasers, which are usually pumped by other fiber lasers at shorter wavelengths (1018 nm e.g.). Fiber lasers directly pumped by laser diodes have higher wall-plug efficiency and are more compact. Here, we report two high brightness monolithic cw fiber laser sources at 1080 nm. Both lasers consist of a cw fiber laser oscillator and one laser-diode pumped double cladding (DC) fiber amplifier in the master oscillator-power amplifier (MOPA) configuration. One laser, using 30 μm-core Yb3+-doped fiber as the gain medium, can produce >5 kW average laser power with near diffraction-limited beam quality (M2<1.8). The slope efficiency of the fiber amplifier with respect to the launched pump power reached 86.5%. The other laser utilized 50 μm-core Yb3+-doped fiber as the gain medium and produced >8 kW average laser power with high beam quality (M2:~4). The slope efficiency of the fiber amplifier with respect to the launched pump power reach 83%. To the best of our knowledge, this is the first detailed report for >5 kW near-diffraction-limited and >8 kW high-brightness monolithic fiber lasers directly pumped by laser diodes.

AB - Tandem pumping technique are traditionally adopted to develop >3kW continuous-wave (cw) Yb3+-doped fiber lasers, which are usually pumped by other fiber lasers at shorter wavelengths (1018 nm e.g.). Fiber lasers directly pumped by laser diodes have higher wall-plug efficiency and are more compact. Here, we report two high brightness monolithic cw fiber laser sources at 1080 nm. Both lasers consist of a cw fiber laser oscillator and one laser-diode pumped double cladding (DC) fiber amplifier in the master oscillator-power amplifier (MOPA) configuration. One laser, using 30 μm-core Yb3+-doped fiber as the gain medium, can produce >5 kW average laser power with near diffraction-limited beam quality (M2<1.8). The slope efficiency of the fiber amplifier with respect to the launched pump power reached 86.5%. The other laser utilized 50 μm-core Yb3+-doped fiber as the gain medium and produced >8 kW average laser power with high beam quality (M2:~4). The slope efficiency of the fiber amplifier with respect to the launched pump power reach 83%. To the best of our knowledge, this is the first detailed report for >5 kW near-diffraction-limited and >8 kW high-brightness monolithic fiber lasers directly pumped by laser diodes.

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