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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TL;DR: In this paper, the mode-locking operation of an Er-doped fiber laser with a Tm?Ho co-depleted fiber saturable absorber is demonstrated for the first time.
Abstract: Mode-locking operation of an Er-doped fiber laser with a Tm?Ho co-doped fiber saturable absorber is demonstrated for the first time. Q-switching, Q-switched mode-locking and CW mode-locking operation modes are observed sequentially with increase of the pump power. In the mode-locking operation mode, a repetition rate at the fundamental cavity frequency of 9.05?MHz is obtained with a pulse duration of 46.3 ns. By rotating the polarization controller, a repetition rate up to 887?MHz is achieved, and the pulse duration is shortened to 0.548?ns.
18 citations
Cites background from "Mode-locked 2 μm laser with highly ..."
...To date, mode-locking of fiber lasers doped with Er [4], Yb [5] and Tm [6] ions has been demonstrated with SESAMs, and various kinds of SESAM are available on the market....
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01 May 2011
TL;DR: In this article, an all-fiber thulium-doped wavelength tunable mode-locked laser operating near 2 μm was proposed, which achieved reliable self-starting mode locking over 50nm tuning range using fiber taper based carbon nanotube (FTCNT) saturable absorber.
Abstract: We propose an all-fiber thulium-doped wavelength tunable mode-locked laser operating near 2 μm. Reliable self-starting mode locking over 50nm tuning range is observed using fiber taper based carbon nanotube (FTCNT) saturable absorber (SA). Spectral tuning is achieved by stretching another fiber taper.
18 citations
Cites background from "Mode-locked 2 μm laser with highly ..."
...To date, a few ultrafast Tm-doped fiber oscillators have been reported [4-8]....
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TL;DR: In this article, the experimental investigation and theoretical analysis on the soliton rain generated in the Tm-doped fiber laser have been carried out on the basis of nonlinear polarization rotation technology.
Abstract: In this paper, the experimental investigation and theoretical analysis on the soliton rain generated in the Tm-doped fiber laser have been carried out. On the basis of nonlinear polarization rotation technology, the fundamental and harmonic soliton rain pulses were obtained, the influence of net negative dispersion cavity length on the output performances of soliton rain pulse were studied, and the spectral sideband characteristics of soliton rain were numerically analyzed. By comparing the spectra of continuous wave mode-locking and soliton rain states, it can be found that the quasi-periodic modulation exists for the spectral sideband of soliton rain resulted from the complex interaction between the dispersive wave and the soliton wave. The interaction is one of the major factors for the formation of soliton rain. The research results are helpful for the better understanding of the soliton rain dynamics and mechanism in passive mode-locked fiber lasers.
18 citations
TL;DR: In this article, a self-started dissipative soliton fiber laser was demonstrated and capable of outputting stable nanosecond mode-locked pulses through the nonlinear rotation inside fibers connected with a Faraday reflective mirror.
Abstract: We demonstrated a polarization-maintained dissipative soliton fiber laser It was self-started and capable of outputting stable nanosecond mode-locked pulses through the nonlinear rotation inside fibers connected with a Faraday reflective mirror The setup of the fiber laser ensured the output pulses with good polarization extinction, high pulse contrast, and quite good long-term stability against environmental disturbance The mode-locked pulses were centered at 1030 nm with a narrow spectral bandwidth and had a pulse duration of 7 ns, while the pulse repetition rate could be varied from 1 to 8 MHz by setting the fiber cavity length The output pulse energy reached 20 nJ at the repetition rate of 1 MHz
18 citations
TL;DR: In this article, an active mode-locked and relaxation-oscillation-modulated 2-μm all-fiber laser with an electronic optical phase modulator with fiber pigtail was used to generate stable pulse trains with a duration of 5.885 μs and a repetition rate of 4-18 kHz.
Abstract: We report on the actively mode-locked and relaxation-oscillation-modulated 2- μm all-fiber laser, using an electronic optical phase modulator with fiber pigtail. Linear-cavity and ring-cavity fiber lasers with Tm-doped fiber were set up with a center wavelength around 1.95 μm. Actively mode-locked stable pulse train was generated with a repetition rate of 11.884 MHz (linear cavity) and 12.099 MHz (ring cavity), and the duration of the pulse was 816 ps and 446 ps, respectively. The stable pulse train with a duration of 5.885 μs and a repetition rate of 4-18 kHz was generated by actively modulating the relaxation oscillation of the linear-cavity fiber laser. Similar results for the ring-cavity fiber laser were 1.554 μs and 6-26 kHz, respectively. All the stable pulse trains' energy fluctuations were less than 7%.
18 citations
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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