Theoretical modeling of fiber laser at 810 nm based on thulium-doped silica fibers with enhanced ^3H_4 level lifetime

Peterka, Pavel; Kašík, Ivan; Dhar, Anirban; Dussardier, Bernard; Blanc, Wilfried

doi:10.1364/oe.19.002773

Cited by 79 publications

(46 citation statements)

References 19 publications

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“…The impact of c on the performance of ring/theta cavity lasers is therefore investigated numerically by implementing the experimental configurations shown in Figure 3 using VPItransmissionMaker software (VPI). The TDF model, implemented in VPI, is based on solving the coupled rate equations for the population inversions of the 3 H 6 , 3 F 4 , 3 H 4 , and 1 G 4 energy levels and the propagation equations for the signals and ASE components [28][29][30][31] . Only the effect of self-phase modulation (SPM) is included in the model.…”

Section: Bar Crmentioning

confidence: 99%

Isolator-free unidirectional thulium-doped fiber laser

Kharitonov

Brès

2015

Light Sci Appl

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We report the first demonstration of a unidirectional, isolator-free 2-mm thulium-doped fiber (TDF) laser, relying on the properties of the theta cavity (ring resonator with S-shaped feedback). The core pumped theta cavity TDF laser provides sub-Watt output power with a slope efficiency of 25%, a 2 dB flat tuning range of 1900-2050 nm, and a linewidth of 0.2 nm, and achieves the extinction ratio of 18-25 dB (depending on the feedback value) between the favored and suppressed lasing directions. It is shown that these characteristics are competitive with, if not superior to, those of conventional ring cavities. The simulation results of the linear and Kerr-nonlinear theta cavities are also presented, explaining certain unexpected features of the laser behavior and establishing the importance of the doped fiber nonlinearity on the spectral shaping of the emitted signal.

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Section: Bar Crmentioning

confidence: 99%

Isolator-free unidirectional thulium-doped fiber laser

Kharitonov

Brès

2015

Light Sci Appl

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“…They can be efficiently pumped at 1550-1650 nm or at 770-810 nm and provide a wide lasing band (see Fig. 2) [38], [39].…”

Section: Multi-watt Fiber Laser For >2 μM Rangementioning

confidence: 99%

Mid-IR Ultrashort Pulsed Fiber-Based Lasers

Sorokina

Dvoyrin

Tolstik

et al. 2014

IEEE J. Select. Topics Quantum Electron.

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We review the latest breakthroughs in ultrafast fiber laser technology in the mid-IR wavelength range ≥2 μm. In particular, we concentrate on two novel laser systems built around passively mode-locked Tm:fiber lasers and fiber-based Cr:ZnS lasers, generating sub-100 femtosecond pulses and frequency combs with several Watt average output powers, hundreds of kilowatts peak powers and tens of nanojoule pulse energies. The tunability in the broad wavelength range between 2 and 2.5 μm as well as a simple all-silica-fiber design makes the Tm-fiber laser a truly unique broadband light source, particularly relevant for applications in gas sensing, fine material processing of semiconductors, composite materials, glasses and plastics, as well as for brain surgery, breath analysis, remote sensing and stand-off trace gas detection, especially in oil and gas industry. We also review techniques for coherent supercontinuum generation in the mid-IR, including a novel technique of direct generation of the supercontinuum in the fiber. A competing Watt level few-optical cycle Cr:ZnS laser operating at 2.4 μm (Patent pending, ATLA Lasers, Trondheim, Norway) is distinguished by extremely short pulse duration of only 41 fs, reliability and compactness. This unique ultrashort-pulsed laser generates intrinsically coherent frequency combs, which further extends the application range to high-resolution and high-sensitivity spectroscopy and optical clocks.

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“…However, lasing around 800 nm is hard to achieve in Tm-doped materials especially in silica based materials due to their relatively low quantum conversion efficiency [3]. Fortunately, the emission efficiency of Tm 3 þ can be enhanced by using upconversion pumping scheme and by codoping Tm 3 þ with other rare earth ions [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%