Tm Fiber Laser Mode-Locked At Large Normal Dispersion

Liu, H.; Kieu, Khanh; Lefrançois, Simon; Renninger, William H.; Chong, Andy; Wise, Frank W.

doi:10.1364/cleo_si.2011.cmk1

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…Dispersion management is vital in many facets of ultrafast technology. Fiber oscillators, whether operating in solitonic [1,2], dissipative soliton [3], stretched pulse [4][5][6], self-similar [7,8], all-normal dispersion [9,10] or noise-like [3,11] regimes, rely on an accurate balance of dispersion inside the cavity to facilitate high pulse energies, wide bandwidths, or both. Recently, a series of commercially available ultra-high numerical aperture fibers (UHNA from Coherent-Nufern) has found use as an intracavity dispersion control tool in ultrafast oscillators working at wavelengths near 2 µm after it had been discovered that these fibers display normal group velocity dispersion (GVD) in the aforementioned spectral region, i.e.…”

Section: Introductionmentioning

confidence: 99%

Dispersion measurement of ultra-high numerical aperture fibers covering thulium, holmium, and erbium emission wavelengths

et al. 2018

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We present broadband group velocity dispersion (GVD) measurements of commercially available ultra-high numerical aperture fibers (UHNA1, UHNA3, UHNA4, UHNA7 and PM2000D from Coherent-Nufern). Although these fibers are attractive for dispersion management in ultrafast fiber laser systems in the 2 μm wavelength region, experimental dispersion data in literature is scarce and inconsistent. Here we demonstrate the measurements using the spectral interferometry technique covering the typically used erbium, thulium and holmium emission bands. The results are characterized in terms of the standard-deviation uncertainty and compared with previous literature reports. Fitting parameters are provided for each fiber allowing for the straightforward replication of the measured dispersion profiles. This work is intended to facilitate the design of ultrafast fiber laser sources and the investigations of nonlinear optical phenomena.

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Section: Introductionmentioning

confidence: 99%

Dispersion measurement of ultra-high numerical aperture fibers covering thulium, holmium, and erbium emission wavelengths

et al. 2018

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“…Further, a significant discovery in recent years is that several commercial ultra-high numerical aperture (UHNA) fibers exhibit positive GVD at the 2 μm band. In 2011, it is confirmed by experiments in bulk structure for the first time, and 470 fs, 0.4 nJ, 2 μm mode-locked pulses in normal dispersion region 24 have been successfully realized. Soon after, dissipative soliton and noise like pulse at 2 μm band can be generated in all-fiber cavity using the UHNA fiber as intra-cavity dispersion management component and single-wall carbon nanotubes as saturable absorber 21 .…”

Section: Introductionmentioning

confidence: 72%

Observation and optimization of 2 μm mode-locked pulses in all-fiber net anomalous dispersion laser cavity

Ma¹,

Zhao²,

Liu³

et al. 2020

Opto-Electronic Advances

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We integrally demonstrate 2 μm mode-locked pulses performances in all-fiber net anomalous dispersion cavity. Stable mode-locking operations with the center wavelength around 1950-1980 nm can be achieved by using the nonlinear polarization rotation structure and properly designing the dispersion management component. Conventional soliton is firstly obtained with a total anomalous dispersion cavity. Due to the contribution of commercial ultra-high numerical aperture fibers, net dispersion is reduced to-0.077 ps 2. So that stretched pulse with 19.4 nm optical bandwidth is obtained and the de-chirped pulse-width can reach 312 fs using extra-cavity compression. Under pump power greater than 890 mW, stretched pulse can evolve into noise-like pulse with 41.3 nm bandwidth. The envelope and peak of such broadband pulse can be compressed with up to 2.2 ps and 145 fs, respectively. The single pulse energy of largely chirped stretched and noise-like pulse can reach 1.785 nJ and 1.53 nJ, respectively. Furthermore, extra-cavity compression can also contribute to a significant increase of peak power.

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“…To date, mode-locked Tm-doped fiber lasers with short duration and high energy have been successfully generated by nonlinear polarization evolution (NPE) [4][5][6][7][8][9], carbon nanotubes (CNTs) [10][11][12], and semiconductor saturable absorption mirror (SESAM) [13][14][15][16][17] in negative and positive dispersion regimes, respectively. Benefiting from the compactness and polarization independence, SESAM have been widely used to initiate and stabilize the mode-locked pulses.…”

Section: Introductionmentioning

confidence: 99%

“…As we know, the spectral width of a mode-locked laser is much larger than the continuous wave (CW) laser and/or Q-switched laser. Most attention has been focused on the mode-locked fiber lasers with broad bandwidth and short duration in the past [4][5][6][7][8][9][10][11][12][13][14][15][16][17], while only a few studies have been reported on mode-locked fiber lasers with narrow bandwidth. However, mode-locked lasers with narrow bandwidth are good pump sources to generate midinfrared due to its better phase matching than femtosecond pulses.…”

Section: Introductionmentioning

confidence: 99%

Mode-locked thulium-doped fiber laser with a narrow bandwidth and high pulse energy

et al. 2012

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We have demonstrated a mode-locked thuliumdoped fiber laser with a narrow bandwidth and high pulse energy using a semiconductor saturable absorption mirror (SESAM). The laser generates sub-nanosecond pulses with a repetition rate of 39.8 MHz, average power of 150 mW, pulse energy of 3.8 nJ and spectrum width of 2 nm which should be attractive for pump sources to generate mid-infrared. To the best of our knowledge, this is the first report on a 2 µm modelocked fiber-oscillator with a narrow spectral width and highest pulse energy in the all-anomalous-dispersion regime.

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Tm Fiber Laser Mode-Locked At Large Normal Dispersion

Cited by 5 publications

References 4 publications

Dispersion measurement of ultra-high numerical aperture fibers covering thulium, holmium, and erbium emission wavelengths

Dispersion measurement of ultra-high numerical aperture fibers covering thulium, holmium, and erbium emission wavelengths

Observation and optimization of 2 μm mode-locked pulses in all-fiber net anomalous dispersion laser cavity

Mode-locked thulium-doped fiber laser with a narrow bandwidth and high pulse energy

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