Mode-locked 2 μm laser with highly thulium-doped silicate fiber
TL;DR: This is the first demonstration of mode-locked 2 mum fiber laser using shorter than 1-m-long active fiber, which paves the way for the demonstration ofmode-locked fiber laser at 2 mum with gigahertz fundamental repetition rate.
Abstract: We report self-starting passively mode-locked fiber lasers with a saturable absorber mirror using a piece of 30-cm-long newly developed highly thulium (Tm)-doped silicate glass fibers. The mode-locked pulses operate at 1980 nm with duration of 1.5 ps and energy of 0.76 nJ. This newly developed Tm-doped silicate fiber exhibits a slope efficiency of 68.3%, an amplified spontaneous emission spectrum bandwidth (FWHM) of 92 nm, and a gain per unit length of greater than 2 dB/cm. To the best of our knowledge, it is the first demonstration of mode-locked 2 μm fiber laser using shorter than 1-m-long active fiber, which paves the way for the demonstration of mode-locked fiber laser at 2 μm with gigahertz fundamental repetition rate.
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17 Mar 2018
TL;DR: In this article, the state of the art in high-energy ultrafast dissipative soliton (DS) 2 μm TDFLs developed in our laboratory is reviewed, and the potential and prospect of this theme are analyzed.
Abstract: In recent years, mid-infrared (mid-IR) lasers have attracted a great interest over the world. During the development of mid-IR laser sources, the 2 μm Tm3+-doped fiber laser (TDFL) has played an important role for its specific emission wavelength between nearIR and mid-IR. Its great potential applications include sensing, medical surgery, ranging, telecommunications, and pump sources for developing 3–5 μm laser systems. Though the continuous-wave (CW) output power of 2 μm TDFLs has been scaled to over 1000 W, high-pulse-energy ultrafast 2 μm TDFLs are still limited by nonlinear optical effects. In traditional soliton mode-locking, the pulse energy has an upper limit defined by the soliton area theorem (or energy quantization principle). For improving the pulse energy of 2 μm fiber lasers, dissipative soliton (DS) mode-locking may be one of the efficient solutions. In this chapter, the current state of the art in high-energy ultrafast DS 2 μm TDFLs developed in our laboratory is reviewed, and the potential and prospect of this theme are analyzed. By introducing a new model, condensed-gain fiber mode-locking, we show that the soliton pulse energy of 2 μm TDFLs can be steadily scaled to over 10 nJ and various soliton dynamics (harmonic mode-locking, soliton molecules, etc.) can be observed. Furthermore, DS mode-locking of TDFLs with one of the two-dimension-like materials (MoS2) is investigated.
1 citations
09 May 2021
TL;DR: In this paper, an all-fiber saturable absorber based on multimode interference (MMI-SA) in a chalcogenide fiber was presented, and the nonlinear saturation profile, and mode-locking was achieved upon insertion of the MMI in a thulium-doped fiber laser cavity.
Abstract: We present an all-fiber saturable absorber based on multimode interference (MMI-SA) in a chalcogenide fiber. Results show the nonlinear saturation profile, and mode-locking upon insertion of the MMI-SA in a thulium-doped fiber laser cavity.
1 citations
17 May 2019
TL;DR: In this paper, the dispersion management method is adopted to accurately manage dispersion in the cavity using a commercial ultra-high numerical aperture fiber and a common single-mode fiber in order to improve the potential application values of 2 μm mode-locked fiber laser in remote sensing, mid-infrared source, material processing and other applications.
Abstract: The stretched pulse has narrower pulse duration and high pulse energy than conventional soliton, so that the stretched pulse can improve the potential application values of 2 μm mode-locked fiber laser in remote sensing, mid-infrared source, material processing and other applications. In this paper, the dispersion management method is adopted to accurately manage the dispersion in the cavity using a commercial ultra-high numerical aperture fiber and a common single-mode fiber. Based on the nonlinear polarization rotation technology to achieve mode-locking, when the pump power is set to 645 mW, the polarization controller is adjusted to achieve stretched pulse output with a de-chirped pulse duration of 581 fs. The center wavelength is 1939.26 nm and the 3-dB bandwidth is 21.8 nm. The repetition rate is 28.9 MHz and the signal to noise ratio is 54.21 dB. At the maximum pump power, the direct output power of the resonant cavity is 9.98 mW, and the corresponding single pulse energy is 0.34 nJ.
1 citations
05 Jun 2016
TL;DR: Passively harmonic mode-locking in a linear Tm/Ho co-doped fiber laser was demonstrated with self-organized, temporally equally spaced solitons at repetition rates over 400 MHz with high side-mode suppression as discussed by the authors.
Abstract: Passively harmonic mode-locking in a linear Tm/Ho co-doped fiber laser is demonstrated with self-organized, temporally equally spaced solitons at repetition rates over 400 MHz with high side-mode suppression.
1 citations
Cites background from "Mode-locked 2 μm laser with highly ..."
...As the pulses feature identical pulse amplitudes and constant temporal splitting, one of the highest effective repetition rates is presented in 2 μm fiber lasers so far (compare [5])....
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TL;DR: In this article, a ZBLAN supercontinuum generator was demonstrated with 7.11 W output power and 3.52 W at wavelengths longer than 2.5 μm.
Abstract: Broadband 1.9-3.9 μm supercontinuum generation in a ZBLAN fiber pumped by 2 μm pulsed laser and amplifier system is demonstrated with 7.11 W output power and 3.52 W at wavelengths longer than 2.5 μm.
1 citations
References
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TL;DR: In this article, a ring-cavity thulium fiber laser with a single-wall carbon nanotube absorber was used in transmission, achieving an average output power of 3.4 mW.
Abstract: We report a ring-cavity thulium fiber laser mode locked with a single-wall carbon nanotube absorber used in transmission. A carboxymethyl cellulose polymer film with incorporated carbon nanotubes synthesized by the arc discharge method has an absorption coinciding with in the amplification bandwidth of a Tm-doped fiber. This laser is pumped by an erbium fiber laser at 1.57 μm wavelength and produces a 37 MHz train of mode-locked 1.32 ps pulses at 1.93 μm wavelength with an average output power of 3.4 mW.
377 citations
TL;DR: In this article, an additive-pulse mode-locked (APM) thulium-doped fiber ring laser was presented, which produces 350-500 fs pulses tunable from 1798 to 1902 nm.
Abstract: We report an additive‐pulse mode‐locked (APM) thulium‐doped fiber ring laser producing 350–500 fs pulses tunable from 1798 to 1902 nm. The laser operates in the soliton regime, where periodic perturbations cause predictable sidebands and modulation in the optical spectrum.
245 citations
02 Jun 1996
TL;DR: A self-starting passively mode-locked thulium-doped silica fiber laser capable of 190-fs pulses is reported, achieved with a band-gap-engineered saturable absorber fabricated monolithically along with the output coupler of the laser by MOCVD.
Abstract: Summary form only given. We report a self-starting passively mode-locked thulium-doped silica fiber laser capable of 190-fs pulses. Mode-locking of the fiber laser was achieved with a band-gap-engineered saturable absorber fabricated monolithically along with the output coupler of the laser by MOCVD. Stable, single-pulse-in-the-cavity mode-locking was observed for a 2-m-long fiber laser utilizing a nanosecond response strained InGaAs detector.
203 citations
TL;DR: Stabilization of a thulium-holmium codoped fiber soliton laser with a saturable absorber based on carbon nanotubes with transform-limited 750-fs pulses with 0.5-nJ energy is reported.
Abstract: We report stabilization of a thulium-holmium codoped fiber soliton laser with a saturable absorber based on carbon nanotubes. The laser generates transform-limited 750-fs pulses with 0.5-nJ energy.
195 citations
TL;DR: A chain of four Tm-doped fibers amplified a single-frequency, 2040 nm diode laser to 608 W with M(2)=1.05+/-0.03, to be known as the highest power obtained from any single- frequencies, single-mode fiber laser.
Abstract: A chain of four Tm-doped fibers amplified a single-frequency, 2040 nm diode laser to 608 W with M2=1.05±0.03, limited by available pump power. Stimulated Brillouin scattering limits were investigated by splicing different lengths of passive fiber to the output of the final amplifier stage. Integrated rms phase noise above 1 kHz was less than λ/30, suggesting the possibility of further scaling via coherent beam combining. To our knowledge, this is the highest power obtained from any single-frequency, single-mode fiber laser.
192 citations