11-mJ, 15-Hz single-frequency diode-pumped Q-switched Er, Yb:phosphate glass laser

Yanagisawa, Takayuki; Asaka, Kota; Hamazu, Kyosuke; Hirano, Y.

doi:10.1364/ol.26.001262

Cited by 30 publications

(12 citation statements)

References 12 publications

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“…Current technology for the diode pumping of solid-state laser materials employs numerous architectures and designs as is evidenced in the literature [1,2,3]. These various pumping schemes may be grouped into two basic categories, longitudinal or transverse pump coupling.…”

Section: Basic Considerationsmentioning

confidence: 99%

Eye-safe erbium glass laser transmitter study Q-switched with cobalt spinel

Chen

Myers

et al. 2004

SPIE Proceedings

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This paper examines several characteristics and phenomenon associated with the optimization of diode pumped erbium ytterbium glass microlasers. Test results indicate that within an erbium ytterbium glass gain element, the excited erbium (laser) ion effective pump depth is larger than the excited ytterbium (sensitizer) ion effective pump depth. Designed specifically for diode pumping, JD phosphate laser glass host material exhibits high rare earth and sensitizer ion solubility. This enhanced doping capability allows the JD glass to be used in a variety of diode pump architectures that are not possible with most conventional crystal & glass laser materials. Our study has shown that new small gain element composite laser glass architectures & designs may be made used to more efficiently capture, contain and uniformly distribute the diode laser pump light. We expect this work to will lead to the next generation of high peak & average power "eye-safe" diode pumped microlasers for use in rangefinding, imaging, illumination tracking and targeting applications.

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Section: Basic Considerationsmentioning

confidence: 99%

Eye-safe erbium glass laser transmitter study Q-switched with cobalt spinel

Chen

Myers

et al. 2004

SPIE Proceedings

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“…However, the relative small emission cross section and low thermal conductivity of Er:Yb co-doped glass have prevented researchers from obtaining high energy Q-switched output. Approaches for the reliable, Q-switched operation of an Er:Yb co-doped glass laser have already been reported in the literature [6,7]. Most of these approaches need special materials and expensive components such as specially designed electro-optic Q-switches or frustrated total internal reflection (FTIR) Q-switch shutter, and the pulse width were fixed and relatively short.…”

Section: Introductionmentioning

confidence: 99%

Compact pulsed high-energy Er:glass laser

Wan

Liu

2012

SPIE Proceedings

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Bulk Erbium-doped lasers are widely used for long-distance telemetry and ranging. In some applications such as coherent Doppler radars, laser outputs with a relatively long pulse width, good beam profile and pulse shape are required. High energy Q-switched Er:glass lasers were demonstrated by use of electro-optic (E/O) Q-switching or frustrated total internal reflection (FTIR) Q-switching. However, the output pulse durations in these lasers were fixed to relatively small values and extremely hard to tune. We report here on developing a novel and compact Q-switched Er:Yb co-doped phosphate glass laser at an eye-safe wavelength of 1.5 µm. A rotating mirror was used as a Q-switch. Co-linear pump scheme was used to maintain a good output beam profile. Near-perfect Gaussian temporal shape was obtained in our experiment. By changing motor rotation speed, pulse duration was tunable and up to 240 ns was achieved. In our preliminary experiment, output pulse energies of 44 mJ and 4.5 mJ were obtained in free-running and Q-switched operation modes respectively.

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“…However, due to amplified spontaneous emission (ASE) effect and the gain dynamics in Er-doped fiber lasers, the repetition rate is limited to kHz [6][7][8][9]. Q-switched solid state lasers are usually applied with comparatively low pulse repetition rates [10], but these lasers are bulky and less robust to environment change…”

Section: Introductionmentioning

confidence: 99%