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 article, a broad emission region was realized by doping transition metal ions into versatile aluminate glasses, in which abundant microstructures and certain oxidizing capacity could be guaranteed to enrich emissions.
Abstract: The emerging era of big data has stimulated the development of optical materials with broad emission region to allow data transmission of higher capacity and speed. Here, broadband emission, almost covering the region of 650–1500 nm, was realized by doping transition metal ions into versatile aluminate glasses, in which abundant microstructures and certain oxidizing capacity could be guaranteed to enrich emissions. Furthermore, we aimed to improve spectroscopic properties via the simultaneous self-redox and crystal field modulation of Cr ions and matrixes, respectively. More emission ions and more efficient centers were created to enhance the emission intensity by more than one order of magnitude. In addition, proper crystal field was created to liberate a new emission band at ∼708 nm. The results may allow the development of tunable fiber laser and amplifier using the materials and pave the way to precisely control the valence and crystal field to obtain efficient emission.
3 citations
TL;DR: In this article, the characteristics of an ultra-short pulse Tm-doped fiber laser based on graphene saturable absorber are analyzed theoretically, and expressions of pulsewidth and chirp are derived, and the influences of optical fiber dispersion and optical fiber nonlinearity are investigated.
3 citations
TL;DR: In this article, Tm3+-doped lead-silicate glass photonic crystal fiber (PCF) was successfully drawn with a core diameter of $30~\mu \text{m}$ and a mode-field-area of ± 3.0-μm −2.
Abstract: Tm3+-doped lead-silicate glass with good thermal stability was prepared by the melt-quenching method. The absorption spectra, emission spectra, luminescent lifetime, and absorption and emission cross sections of the core glass were measured and analyzed. Then, Tm3+-doped lead-silicate glass photonic crystal fiber (PCF) was successfully drawn with a core diameter of $30~\mu \text{m}$ and a mode-field-area of ± $3160~\mu \text{m}^{2}$ of the emitted fundamental mode. Nearly 2.0- $\mu \text{m}$ amplified spontaneous emission was obtained in a 3.0-cm-long as-drawn PCF. The results indicate that the Tm3+-doped PCF is a promising fiber material for 2.0- $\mu \text{m}$ fiber laser applications.
3 citations
Cites background from "Mode-locked 2 μm laser with highly ..."
...Moreover, the slope efficiency of laser in the leadsilicate glass fiber is much higher than that in other oxide glass fiber [11], [12]....
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TL;DR: In this article, the authors presented a high average power narrowband-pulsed fiber master oscillator power amplifier (MOPA) near 2 GHz with an average power exceeding 200 W.
Abstract: We present a high average power narrowband-pulsed fiber master oscillator power amplifier (MOPA) at 1971 $\mu \text{m}$ The linewidth of the pulse trains is broadened to $\sim 15$ GHz via phase modulation The repetition rates are 3 and 5 MHz, respectively The output power of pulse train with 3 MHz repetition rate is 192 W, and the pulsewidth is 51 ns, corresponding to a peak power of 111 kW and a pulse energy of 62 $\mu \text{J}$ The output power of pulse train with 5 MHz repetition rate is 209 W, and the pulsewidth is 46 ns, corresponding to a peak power of 086 kW and a pulse energy of 42 $\mu \text{J}$ Higher output power can be achieved by narrowing the pulsewidth to several nanoseconds To the best of our knowledge, this is the first demonstration on high-power narrowband nanosecond-pulsed MOPA near 2 $\mu \text{m}$ with an average power exceeding 200 W
3 citations
16 Nov 2014
TL;DR: In this paper, an experimental demonstration of a heavily Tm3+-doped silicate fiber amplifier with a gain per unit length of 3.17 dB/cm is presented.
Abstract: We report on experimental demonstration of a heavily Tm3+-doped silicate fiber amplifier with a gain per unit length of 3.17 dB/cm. Short 1.92-μm single-mode Tm3+-doped silicate fiber lasers with 58% slope efficiency are also presented.
3 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