Diode-pumped, continuous-wave Tm:YAIO_3 laser

Thevar, Thangavel; Barnes, Norman P.

doi:10.1364/ao.45.003352

Cited by 15 publications

(4 citation statements)

References 11 publications

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“…The absorption band of the Tm 3+ -doped crystals matches the emission wavelength of the high brightness InGaAs laser diodes, which makes direct diode pumping possible. A large number of thulium-doped crystals have been recognized as very interesting active media for diode-pumped ∼ 2 µm laser os-cillators such as Tm:YAG, Tm:YLF, Tm:KLu(WO 4 ) 2 , and Tm:KYW [3][4][5][6][7][8][9][10]. Tm:YAlO 3 (Tm:YAP) crystal is aroused widespread concern in recent years as a laser material near 2 µm [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide absorber for 2 µm passive mode-locking Tm:YAlO3 laser

et al. 2011

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For the first time of our knowledge, we demonstrate the graphene oxide as a saturable absorber (SA) in the passive mode-locking of a diode pumped Tm 3+ -doped laser. Broadly spectral region sub-10 ps mode-locking in a Tm:YAlO3 (Tm:YAP) laser near 2 µm were obtained. With a pump power of 8.64 W, the average output power of 268 mW with the maximum pulse energy of 3.7 nJ at the pulse repetition frequency (PRF) of 71.8 MHz was obtained.

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Section: Introductionmentioning

confidence: 99%

Graphene oxide absorber for 2 µm passive mode-locking Tm:YAlO3 laser

et al. 2011

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“…Laser emission from Tm:YAP crystal was first demonstrated with flash-lamp pumping [10] and then using Ti:sapphire laser pumping [11]. Currently, it has been demonstrated that diode pumping is the most efficient way for Tm:YAP laser pumping [12,13]. The Tm:YAP single crystal is attractive as active material for 2-µm lasers mainly due to its natural birefringence combined with good thermal and mechanical properties similar to those of the YAG crystal [8].…”

Section: Introductionmentioning

confidence: 99%

Room-temperature cw and pulsed operation of a diode-end-pumped Tm:YAP laser

Cai

Kong

et al. 2007

Appl. Phys. B

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We report the continuous-wave and acousto-optical Q-switched operation of a diode-end-pumped Tm:YAP laser. Continuous-wave output power of 3.5 W at 1.99 µm was obtained under the absorbed pump power of 14 W. Under Qswitched laser operation, the average output power increased from 1.57 W to 2.0 W, with an absorbed pump power of 12.6 W, as the repetition rate increased from 1 kHz to 10 kHz. The maximum Q-switched pulse energy was 1.57 mJ with a repetition rate of 1 kHz. The minimum pulse width was measured to be about 80 ns, corresponding to a peak power of 19.6 kW.PACS 42.55.Rz; 42.55.Xi; 42.60.Gd IntroductionSolid-state lasers working at the 2-µm waveband are of great interest because of several favorable characteristics. Owing to the strong absorption by liquid water, the 2-µm laser is an ideal light source for bio-medical applications. The 2-µm laser can also be used for range finding, coherent laser lidar and atmospheric sensing since it is in the eye-safe spectral range. In addition, high-power 2-µm lasers are preferable as pump sources for optical parametric oscillators (OPOs) and optical parametric amplifiers (OPAs) in the mid-infrared region than 1-µm lasers since they provide higher quantum efficiency. Based on these considerations, solid-state lasers operating around the 2-µm waveband have been intensively investigated recently [1][2][3]. In order to obtain the 2-µm-waveband laser oscillation, the rare-earth-ion thulium (Tm 3+ ) and holmium (Ho 3+ ) doping materials, which work as quasi-three-level laser systems, are commonly used. However, due to the existence of reabsorption loss, the laser performance is sensitive to the change of temperature. For this, liquid-nitrogen cooling is often used to achieve a highefficiency laser output but this incurs great inconvenience in practical applications. In addition to the temperature of the laser system, the physical and chemical properties of the laser host can greatly affect the laser performance. Therefore, studu Fax: +86-571-87952437, E-mail: physyh@zju.edu.com ies of laser hosts for 2-µm lasers have also been intensively carried out. Laser operations based on several hosts such as YAG, YLF and vanadates (YVO 4 and GdVO 4 ) etc. were reported [4][5][6][7]. Furthermore, the search for better Tm-host crystals is still in progress and recent studies show promising results with YAP single crystals [8,9]. Laser emission from Tm:YAP crystal was first demonstrated with flash-lamp pumping [10] and then using Ti:sapphire laser pumping [11]. Currently, it has been demonstrated that diode pumping is the most efficient way for Tm:YAP laser pumping [12,13]. The Tm:YAP single crystal is attractive as active material for 2-µm lasers mainly due to its natural birefringence combined with good thermal and mechanical properties similar to those of the YAG crystal [8]. In addition, the emission cross section of thulium in the YAP crystal (5.5 × 10 −21 cm 2 ) is twice as high as that in the YAG crystal (2.2 × 10 −21 cm 2 ) [9]. Furthermore, it has been demonstrated tha...

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“…The wavelength around 2.0 μm is not only a strong absorption peak of water, but also widely used in medical, military, remote detection [1][2][3] and other fields, such as pumping of Ho:YAG. If Ho:YAG can be directly pumped by a Tm laser, the problem of Ho:Tm upconversion in Ho:Tm:YAG can be obviated, which will lead to more efficient Ho:YAG laser operation [4]. YALO 3 also has good thermal and mechanical properties, similar to YAG.…”

Section: Introductionmentioning

confidence: 99%

A diode-pumped Q-switcheda-cut Tm:YAP laser with an average output power of 13 W

Wang¹,

Zhang²,

Cai³

et al. 2014

Laser Phys.

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We report experimental results on a highly efficient Q-switched a-cut Tm:YAP laser working at 1.99 µm. A fiber-coupled laser diode (LD) working at 795 nm was used to pump a Tm:YAP (diameter 5 mm × 9 mm) crystal with 3% Tm 3+ doping. Under the input pump power of 44.5 W, it delivered a polarized pulsed laser output with a repetition rate of 10 kHz at 1.99 µm. The maximum output power was 13.29 W, corresponding to a slope efficiency of 36.5% and optical-to-optical conversion efficiency of 29.9%. The influences of curvature and transmittance of the output mirror on the laser output are analyzed and validated by experiments, and the results are of benefit for optimization of the laser cavity.

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Diode-pumped, continuous-wave Tm:YAIO_3 laser

Cited by 15 publications

References 11 publications

Graphene oxide absorber for 2 µm passive mode-locking Tm:YAlO3 laser

Graphene oxide absorber for 2 µm passive mode-locking Tm:YAlO3 laser

Room-temperature cw and pulsed operation of a diode-end-pumped Tm:YAP laser

A diode-pumped Q-switcheda-cut Tm:YAP laser with an average output power of 13 W

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