High-power linearly-polarized operation of a cladding-pumped Yb fibre laser using a volume Bragg grating for wavelength selection

Jelger, Pär; Wang, P.; Sahu, J.K.; Laurell, Fredrik; Clarkson, W.A.

doi:10.1364/oe.16.009507

Cited by 43 publications

(23 citation statements)

References 15 publications

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“…Efficient applications of VBGs for stabilizing and narrowing the laser diodes [14], optical parametric oscillators [15] and solid-state lasers [16] have been frequently demonstrated in past years. More recently, VBGs have also been successfully employed as a wavelength selective element in high-power fiber lasers operating in various spectral regions, such as Yb-doped fiber lasers at ~1 μm [17], Er,Yb co-doped fiber lasers at ~1.5-1.6 μm [18][19], Raman fiber lasers at ~1.7 μm [20] and Tm-doped fiber laser at ~2 μm [21] with output powers up to 138 W, 103 W, 11 W and 112 W, respectively. However, to the best of our knowledge, the wavelength narrowing and selection potential of VBGs in the 2.6-5 μm mid-IR wavelength region has not been reported yet.…”

Section: +mentioning

confidence: 99%

Widely Wavelength-Tunable Mid-Infrared Fluoride Fiber Lasers

Liu

Huang

et al. 2018

IEEE J. Select. Topics Quantum Electron.

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Abstract-We demonstrate widely wavelength-tunable continuous-wave (CW) and Q-switched Er 3+ -doped ZBLAN fluoride fiber lasers operating around 3 μm enabled by a volume Bragg grating (VBG). In the CW operation regime, a total wavelength tuning range of over 160 nm spanning from 2694 nm to 2854 nm has been achieved. For the Q-switched mode of operation, a slightly modified resonator configuration, incorporating a passive Q-switcher, topological insulator Bi2Te3 nanosheets, can produce stable pulse trains with a pulse width of 880 ns at a repetition rate of 81 kHz, while maintaining a wavelength tuning range of 62 nm from 2762 nm to 2824 nm through adjusting the VBG. In both operation regimes, the output spectral width is measured to be <0.3 nm (FWHM) over the whole tuning range. Our work both demonstrates the great wavelength-tuning potential of the Er 3+ -doped fluoride fiber laser, and also paves a way for the development of a range of high performance mid-infrared laser sources.Index Terms-Mid-infrared, wavelength tunable, Q-switched, topological insulator, fiber lasers.

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Section: +mentioning

confidence: 99%

Widely Wavelength-Tunable Mid-Infrared Fluoride Fiber Lasers

Liu

Huang

et al. 2018

IEEE J. Select. Topics Quantum Electron.

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“…Some numerical calculations on how VBGs are affected by absorption are available in the literature [18][19][20][21]. For a reflected laser beam Jelger et al [18] showed that the heat distribution loosely follows the intensity distribution in the grating for a highly reflective VBG with an absorption coefficient of 10 −3 cm −1 .…”

Section: Introductionmentioning

confidence: 99%

Thermal limitations of volume Bragg gratings used in lasers for spectral control

et al. 2013

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In this paper we present experiments and calculations of the property changes of a highly reflecting volume Bragg grating (VBG) when it is used as a laser cavity mirror. A small absorption of the reflected laser beam resulted in a laser output power roll-off, increased coupling through the VBG, and a change of the spectrum from a single to a double peak at high power. The simulations revealed that an inhomogeneous temperature distribution deformed the grating such that the diffraction efficiency was reduced and the light penetrated deeper into the VBG, which accelerated the deteriorating effects. We extrapolated the power limit found in our investigations for various beam radii and absorption coefficients.

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“…Another free space stabilization element is a volume grating written in photo-thermal refractive (PTR) glass, forming a VBG. VBGs have performed well for oscillator stabilization to powers >100 W for Yb, Er: Yb, and Tm oscillators [2][3][4]. In this paper we use a new component known as a guided mode resonance filter (GMRF), which can be produced in large quantities using thin film fabrication techniques.…”

Section: Introductionmentioning

confidence: 99%

Spectral narrowing and stabilization of thulium fiber lasers using guided-mode resonance filters

et al. 2010

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Guided mode resonance filters (GMRF) were used to spectrally-stabilize and line-narrow the output spectrum from Tm fiber lasers operating in the 2 μm wavelength regime. The GMRFs were placed in the output path of an amplified spontaneous emission (ASE) light source and the transmitted light was measured as a notch in the spectrum on resonance. The GMRFs were characterized to determine their peak reflectivity, resonance wavelength, and spectral linewidth of each element. These measurements showed various resonance wavelengths and linewidths varying from 0.50-1.5 nm depending on the individual GMRF parameters. Using GMRFs as feedback elements in Tm fiber laser oscillators resulted in output powers up to 10 W and slope efficiencies of 30-45% with respect to launched 790 nm pump power. In order to scale to higher powers and maintain narrow linewidths, a master oscillator power amplifier (MOPA) setup was employed with a GMRF stabilized master oscillator. In addition to the laser and amplifier characteristics, thermal and damage testing of the GMRFs is reported.

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High-power linearly-polarized operation of a cladding-pumped Yb fibre laser using a volume Bragg grating for wavelength selection

Cited by 43 publications

References 15 publications

Widely Wavelength-Tunable Mid-Infrared Fluoride Fiber Lasers

Widely Wavelength-Tunable Mid-Infrared Fluoride Fiber Lasers

Thermal limitations of volume Bragg gratings used in lasers for spectral control

Spectral narrowing and stabilization of thulium fiber lasers using guided-mode resonance filters

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