Dual-comb self-mode-locked monolithic Yb:KGW laser with orthogonal polarizations

Chang, M. T.; Liang, H. C.; Su, Kuan-Wei; Chen, Y. F.

doi:10.1364/oe.23.010111

Cited by 30 publications

(17 citation statements)

References 25 publications

(27 reference statements)

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“…showing the potential of the single-laser scheme as a compact and simple alternative for dualcomb systems. More recently, inspired by the potential dual-comb applications, dual-comb lasing had been realized in more mode-locked laser platforms such as solid-state [32,33] and semiconductor disk lasers [34] with gigahertz pulse repetition rates.…”

Section: Introductionmentioning

confidence: 99%

Picometer-resolution dual-comb spectroscopy with a free-running fiber laser

Zhao

et al. 2016

Opt. Express

213

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Dual-comb spectroscopy utilizes two sets of comb lines with slightly different comb-tooth-spacings, and optical spectral information is acquired by measuring the radio-frequency beat notes between the sets of comb lines. It holds the promise as a real-time, high-resolution analytical spectroscopy tool for a range of applications. However, the stringent requirement on the coherence between comb lines from two separate lasers and the sophisticated control system to achieve that have confined the technology to the top metrology laboratories. By replacing control electronics with an all-optical dualcomb lasing scheme, a simplified dual-comb spectroscopy scheme is demonstrated using just one dual-wavelength, passively mode-locked fiber laser.Dual-comb pulses with a repetition-frequency difference determined by the intracavity dispersion are shown to be sufficiently stable against common-mode cavity drifts and noises. As sufficiently low relative linewidth is maintained between two sets of comb lines, capability to resolve RF beat notes between comb teeth and picometer-wide optical spectral features is demonstrated using a simple data acquisition and processing system in an all-fiber setup. Possibility to use energy-efficient, free-running fiber lasers with a small comb-toothspacing could enable the realization of low-cost dual-comb spectroscopy systems affordable to more applications.

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Section: Introductionmentioning

confidence: 99%

Picometer-resolution dual-comb spectroscopy with a free-running fiber laser

Zhao

et al. 2016

Opt. Express

213

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“…Both theoretical and experimental results confirm that an increase in the longitudinal mode spacing is effectively beneficial to the SML operation [24][25][26]. Consequently, the monolithic resonator with large mode spacing is particularly suitable for the SML operation [25][26][27][28]. In the early stages, monolithic or bonded cavities were often used in developing the continuous-wave [29][30][31] and passively Q-switched lasers [32][33][34][35] due to the advantage of mechanical stability, compact, and alignment-free manufacturing.…”

Section: Introductionmentioning

confidence: 85%

Monolithic dual-polarization self-mode-locked Nd:YAG 946-nm lasers: controlling beat frequency and observation of temporal chaos

et al. 2016

Self Cite

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The self-mode-locked (SML) operation at 946 nm can be achieved with a monolithic Nd:YAG crystal when the pump power is above the threshold of the multiple-longitudinal-mode generation. The SML output is further found to include two orthogonal polarization components with a beat frequency coming from the birefringence effect in the laser crystal. The beat frequency can be widely adjusted in the range of 5-220 MHz by controlling the cooling temperature. The present experiment also confirms the theoretical prediction that the two-mode operation generally exhibits the chaotic dynamics when the frequency difference is sufficiently close to the relaxation frequency.

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“…Potassium rare-earth double tungstate crystals doped with ytterbium, KRE(WO4)2:Yb 3+ , have been widely used for microchip [1,2], mode-locked [3], and high-power lasers [4,5]. The KRE(WO4)2:Yb 3+ gain medium exhibits transition cross-sections significantly higher than those of many other Yb 3+ -doped materials, such as YAG:Yb 3+ [6,7].…”

Section: Introductionmentioning

confidence: 99%

Gain dynamics in a highly ytterbium-doped potassium double tungstate thin-film amplifier

Yong

Aravazhi

Vázquez-Córdova

et al. 2019

Solid State Lasers XXVIII: Technology and Devices

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Active media with high rare-earth concentrations are essential for small-footprint waveguide amplifiers. When operating at high population inversion, such devices are often affected by undesired energy-transfer processes and thermal effects. In this work, we study a 32-µm-thick epitaxial layer of potassium gadolinium ytterbium double tungstate with a high Yb content of 57at.%, representing an Yb 3+ concentration of ~3.8 × 10 21 per cubic centimeter, grown onto an un-doped KY(WO4)2 substrate. The pump absorption, luminescence decay, and small-signal gain are investigated under intense pumping conditions. Spectroscopic signatures of an energy-transfer process and of quenched ions, as well as thermal effects are observed. We present a gain model which takes into account excessive heat generated due to the abovementioned experimental observations. Based on finite-element calculations, we find that the net gain is significantly reduced due to, firstly, a fraction of Yb 3+ ions not contributing to stimulated emission, secondly, a reduction of population inversion owing to a parasitic energy-transfer process and, thirdly, degradation of the effective transition cross-sections owing to device heating. Nevertheless, a signal enhancement of 8.1 dB was measured from the sample at 981 nm wavelength when pumping at 932 nm. The corresponding signal net gain of ~800 dB/cm, which was achieved without thermal management, is promising for waveguide amplifier operating without active cooling.

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Dual-comb self-mode-locked monolithic Yb:KGW laser with orthogonal polarizations

Cited by 30 publications

References 25 publications

Picometer-resolution dual-comb spectroscopy with a free-running fiber laser

Picometer-resolution dual-comb spectroscopy with a free-running fiber laser

Monolithic dual-polarization self-mode-locked Nd:YAG 946-nm lasers: controlling beat frequency and observation of temporal chaos

Gain dynamics in a highly ytterbium-doped potassium double tungstate thin-film amplifier

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