Eyesafe high peak power pulsed fiber lasers limited by fiber nonlinearity

Canat, Guillaume; Renard, W.; Lucas, E.; Lombard, Laurent; Gouët, Julien Le; Durécu, Anne; Bourdon, P.; Bordais, Sylvain; Jaouën, Yves

doi:10.1016/j.yofte.2014.06.010

Cited by 9 publications

(7 citation statements)

References 38 publications

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“…It is known that the 2 μm wavelength region covers various gas absorption lines (e.g., H 2 O, CO, and CO 2 ) which may be useful in atmospheric sensing [22,23] and also it is deemed as the most promising pump band for wavelength conversion to the mid-infrared molecular fingerprint region [e.g., for ZnGeP 2 -based optical parametric oscillator (OPO)] [24] and supercontinuum generation [25,26]). The ultra-wide gain spectrum of thulium or holmium-doped fibers at 2 μm makes them favorable to generate ultrafast mode-locked pulses.…”

Section: Introductionmentioning

confidence: 99%

Soliton mode-locked fiber laser based on topological insulator Bi_2Te_3 nanosheets at 2 μm

Yin¹,

Zhang²,

Li³

et al. 2015

Photon. Res.

132

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We reported diverse soliton operations in a thulium/holmium-doped fiber laser by taking advantage of a tapered fiber-based topological insulator (TI) Bi 2 Te 3 saturable absorber (SA). The SA had a nonsaturable loss of ∼53.5% and a modulation depth of 9.8%. Stable fundamentally mode-locked solitons at 1909.5 nm with distinct Kelly sidebands on the output spectrum, a pulse repetition rate of 21.5 MHz, and a measured pulse width of 1.26 ps were observed in the work. By increasing the pump power, both bunched solitons with soliton number up to 15 and harmonically mode-locked solitons with harmonic order up to 10 were obtained. To our knowledge, this is the first report of both bunched solitons and harmonically mode-locked solitons in a fiber laser at 2 μm region incorporated with TIs.

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Section: Introductionmentioning

confidence: 99%

Soliton mode-locked fiber laser based on topological insulator Bi_2Te_3 nanosheets at 2 μm

Yin¹,

Zhang²,

Li³

et al. 2015

Photon. Res.

132

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“…Figure 5(b) shows the average-power spectrum. With 40 kW of peak power, the nonlinear effect of four-wave mixing generates sidebands (e.g., [7,17,18]) containing ∼44% of the energy. Sideband energy is included in all reported energies, but is negligible in most cases.…”

Section: Methodsmentioning

confidence: 99%

“…In the absence of quenching, high-energy pulse amplification in rare-earth-doped fiber amplifiers, including EDFAs, is well understood [1][2][3][4][5][6][7][8][9][10][11]17,[45][46][47][48]. In the unquenched case, amplified spontaneous emission (ASE) or spurious lasing limits the energy that can be extracted (E extractable ) in a high-energy signal pulse to a few times the intrinsic saturation energy E IS , or say, at most 10 times [46][47][48] if the stored energy and the extraction efficiency are both at their practical limits.…”

Section: High-energy Pulse Amplification In Unquenched Fiber Amplifiersmentioning

confidence: 99%

“…Erbium-doped fiber amplifiers (EDFAs) and lasers enable versatile and compact optical sources in the wavelength range of ∼1.5-1.6 µm (e.g., [1][2][3][4][5][6][7][8][9][10][11]), and can readily be cladding-pumped with over 100 W of power from 980-nm diode lasers at low cost. Their wavelength range offers good atmospheric transmission and relative "eye-safety", highly desirable for LIDAR [2,10,12], remote sensing, and imaging [13].…”

Section: Introductionmentioning

confidence: 99%

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Efficient extraction of high pulse energy from partly quenched highly Er³⁺-doped fiber amplifiers

et al. 2020

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We demonstrate efficient pulse-energy extraction from a partly quenched erbiumdoped aluminosilicate fiber amplifier. This has a high erbium concentration that allows for short devices with reduced nonlinear distortions but also results in partial quenching and thus significant unsaturable absorption, even though the fiber is still able to amplify. Although the quenching degrades the average-power efficiency, the pulse energy remains high, and our results point to an increasingly promising outcome for short pulses. Furthermore, unlike unquenched fibers, the conversion efficiency improves at low repetition rates, which we attribute to smaller relative energy loss to quenched ions at higher pulse energy. A short (2.6 m) cladding-pumped partly quenched Er-doped fiber with 95-dB/m 1530-nm peak absorption and saturation energy estimated to 85 µJ reached 0.8 mJ of output energy when seeded by 0.2-µs, 23-µJ pulses. Thus, according to our results, pulses can be amplified to high energy in short highly Er-doped fibers designed to reduce nonlinear distortions at the expense of average-power efficiency.

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“…One of the main methods to generate high energy pulsed FL is a master oscillator power amplifier (MOPA) system, which combines main oscillator with high beam quality and optical fiber amplifier with high power [1,2]. However, when pulse laser with high peak power is amplified using optical fiber amplifier, if the intensity of the pulse laser reaches a certain value, various nonlinear optical effects occur inside fiber amplifying medium, which restrict the output intensity and the propagation length of pulse beam [3,4].…”

Section: Introductionmentioning

confidence: 99%

Development of an All‐Fiber Coherent Beam Combining System toward High Energy Pulse Fiber Lasers

Kambayashi

Yoshida

Inoue

2017

Elect Comm in Japan

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Our present work develops an all-fiber coherent beam combining (CBC) system to achieve a high energy pulse fiber laser beyond pulse energy limits due to nonlinear effects in rare-earth-doped fibers. Coherent beam combining is a power addition technology that obtains high energy density and high beam quality because it integrates multiple laser beams in a monolight wave. However, the CBC using optical fibers is technically difficult because the optical phases and polarization in optical fibers fluctuate due to disturbances. Therefore, we developed a novel all-fiber CBC system that can precisely control optical path lengths and automatically compensate polarization changes. When the system combined four laser pulses, it achieved a beamcombining efficiency of 96.6% that was about four times as high as a pulse energy before combining. In addition, the system obtained 97.1% beam-combining efficiency of CBC using femtosecond pulses that have very low coherences by minimizing the optical path-length differences between combined two pulses. Moreover, the system successfully regulated the beam-combining-efficiency changes to less than 2.0 percentage points in full width by suppressing optical path-length fluctuations and tracking-control of the optical phases. C⃝ 2017 Wiley Periodicals, Inc. Electron Comm Jpn, 100(2): 36-42, 2017; Published online in Wiley Online Library (wileyonlinelibrary.com).

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Eyesafe high peak power pulsed fiber lasers limited by fiber nonlinearity

Cited by 9 publications

References 38 publications

Soliton mode-locked fiber laser based on topological insulator Bi_2Te_3 nanosheets at 2 μm

Soliton mode-locked fiber laser based on topological insulator Bi_2Te_3 nanosheets at 2 μm

Efficient extraction of high pulse energy from partly quenched highly Er³⁺-doped fiber amplifiers

Development of an All‐Fiber Coherent Beam Combining System toward High Energy Pulse Fiber Lasers

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Eyesafe high peak power pulsed fiber lasers limited by fiber nonlinearity

Cited by 9 publications

References 38 publications

Soliton mode-locked fiber laser based on topological insulator Bi_2Te_3 nanosheets at 2 μm

Soliton mode-locked fiber laser based on topological insulator Bi_2Te_3 nanosheets at 2 μm

Efficient extraction of high pulse energy from partly quenched highly Er3+-doped fiber amplifiers

Development of an All‐Fiber Coherent Beam Combining System toward High Energy Pulse Fiber Lasers

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Efficient extraction of high pulse energy from partly quenched highly Er³⁺-doped fiber amplifiers