Low repetition rate, hybrid fiber/solid-state, 1064  nm picosecond master oscillator power amplifier laser system

Agnesi, Antonio; Carrà, Luca; Pirzio, Federico; Piccoli, Riccardo; Reali, G.

doi:10.1364/josab.30.002960

Cited by 26 publications

(8 citation statements)

References 26 publications

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“…The pump source used in the present experiment was a compact hybrid Master Oscillator Power Amplifier (MOPA) laser system based on a mode-locked ps Yb-fiber oscillator in combination with a diode-pumped bulk Nd:YVO 4 power amplifier [7]. The low power single-mode fiber oscillator output was first injected into an all-fiber double-pass pre-amplifier.…”

Section: Experimental Set-upmentioning

confidence: 99%

Narrow-bandwidth, picosecond, 1064-nm pumped optical parametric generator for the mid-IR based on HgGa2S4

Piccoli

Pirzio

Agnesi

et al. 2014

Advanced Solid State Lasers

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We report on optical parametric generation in HgGa 2 S 4 pumped by 16-ps, 1064-nm pulses at 250 kHz with idler tuning from 3.85 to 10 µm. Seeding at the signal wave ensures narrow-bandwidth, quasi-Fourier-limited, high beam-quality operation.OCIS codes: (190.4970) Parametric oscillators and amplifiers; (160.4330) Nonlinear optical materials. IntroductionOptical parametric generators (OPGs) and amplifiers (OPAs) are widely used for frequency down-conversion of powerful (amplified) ultrafast laser sources operating in the near-IR part of the spectrum into the mid-IR. However, the application of nonoxide nonlinear optical crystals to generate idler wavelengths beyond 4-5 µm, the upper transmission limit of oxide materials, is problematic in this regime for few reasons [1]. One of the major restrictions comes from two-photon absorption (TPA) at the pump wavelength because non-oxide crystals show smaller band-gap energy E g . It is related to the availability of amplified ultrafast laser sources: The most mature and powerful picosecond (ps) laser sources based on the Nd 3+ -ion emit near 1 µm. This represents the shortest pump wavelength used so far in such OPG/OPAs [1]. Most of the demonstrated mid-IR OPGs were pumped, however, at longer wavelengths, primarily near 2.9 µm, by less mature and efficient lamp-pumped Er-lasers/amplifiers operating at very low (few Hz) repetition rates [1].In earlier work on 1-µm pumped ps OPG/OPA using AgGaS 2 (AGS) pumped by ~20 ps Nd:YAG laser pulses, idler wavelengths as long as 10 µm were reached, at pulse duration ~8 ps and typical bandwidths of 10 cm -1 , which corresponds roughly to 5 times the Fourier limit [2]. Away from degeneracy, however, the conversion efficiency dropped getting few times lower compared to difference-frequency generation (DFG) [3]. Higher total conversion efficiency and an order of magnitude increase in the idler pulse energy (e.g., 130 µJ at 5.3 µm) were reported in [4]. These OPG/OPA experiments were performed with single pulses (repetition rate ~1 Hz) from lamp-pumped laser systems [2,4]. The interest in ultrafast OPG/OPAs pumped near 1 µm was recently revived after the discovery of the CdSiP 2 (CSP) crystal possessing extremely high nonlinearity which offers non-critical phase-matching (PM) [1]. In [5] a single pass CSP OPG was pumped by 8.7 ps Nd:YVO 4 laser pulses at 100 kHz. Pump to idler conversion efficiency ~2.5% was achieved for an idler wavelength of 6.204 µm resulting in an average idler power of 154 mW, however, thermal lensing effects occurred beyond this pump level caused by the still relatively high residual absorption of CSP at 1.064 µm. With time-bandwidth product TBP~9.3 measured for the signal, the pulses were also far from Fourier-limited. In another experiment, a non-critically phase-matched CSP OPG was temperature tuned from 6.153 to 6.731 µm delivering maximum idler energy of 33 µJ at 6.234 µm (or ~1.6% conversion efficiency to the idler) with 20 ps, 5 Hz pump pulses from a Nd:YAG laser system but the TBP reported was roughly 100 tim...

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Section: Experimental Set-upmentioning

confidence: 99%

Narrow-bandwidth, picosecond, 1064-nm pumped optical parametric generator for the mid-IR based on HgGa2S4

Piccoli

Pirzio

Agnesi

et al. 2014

Advanced Solid State Lasers

Self Cite

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“…But it is difficult for this kind of hybrid system to work at thousands of kilohertz repetition, since the length of the regeneration cavity is limited by the rising edge of the pulse picker. Another kind of hybrid system is the hybrid master oscillator power amplifier (MOPA), [17][18][19] which is widely used in seed pulse amplification at higher repetition rate. In these configurations, the all-fiber picosecond laser seed source is amplified by the multi-pass amplifier.…”

Section: Introductionmentioning

confidence: 99%

High gain fiber-solid hybrid double-passing end-pumped Nd:YVO₄ picosecond amplifier with high beam quality*

Dong¹,

Li²,

Li³

et al. 2020

Chinese Phys. B

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We propose a fiber-solid hybrid system which consists of a semiconductor saturable absorber mirror (SESAM) mode-locked fiber seed with a pulse width of 10.2 ps and a repetition rate of 18.9 MHz, a two-level fiber pre-amplifier and a double-passing end-pumped Nd:YVO4 amplifier. In the solid-state amplifier, to enhance the gain and the extraction efficiency, a specially designed structure in which the seed light passes through the gain medium four times and makes full use of population inversion is used as the double-passing amplifier. Besides, the beam filling factor (the ratio of the seed light diameter to the pump light diameter) and the thermal lens effect of the double-passing amplifier are considered and its optical-to-optical conversion efficiency is further improved. To preserve the beam quality of the double-passing amplifier, a new method of spherical-aberration self-compensation based on the principles of geometrical optics is used and discussed. Our system achieves a maximum average power of 9.5 W at the pump power of 28 W, corresponding to an optical-to-optical efficiency of 27%. And the beam quality factor M 2 reaches 1.3 at the maximum output power.

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“…This type of fiber laser has been widely investigated with the aforementioned methods, i.e. NPR [33], NOLM [34], CNT [35]and SESAM [36]. However, the NPR-based and NOLMbased mode locked fiber lasers are polarization-sensitive as well as intensity-dependent, which implies a complicated adjustment in an all-fiber structure [37,38].…”

Section: Introductionmentioning

confidence: 99%

Switchable Dual-Wavelength Mode-Locked Fiber Laser Source for In-PCF Parametric Frequency Conversion Applied to CARS Microscopy

Aporta

Quintela

López‐Higuera

2019

J. Lightwave Technol.

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Low repetition rate, hybrid fiber/solid-state, 1064 nm picosecond master oscillator power amplifier laser system

Cited by 26 publications

References 26 publications

Narrow-bandwidth, picosecond, 1064-nm pumped optical parametric generator for the mid-IR based on HgGa2S4

Narrow-bandwidth, picosecond, 1064-nm pumped optical parametric generator for the mid-IR based on HgGa2S4

High gain fiber-solid hybrid double-passing end-pumped Nd:YVO₄ picosecond amplifier with high beam quality*

Switchable Dual-Wavelength Mode-Locked Fiber Laser Source for In-PCF Parametric Frequency Conversion Applied to CARS Microscopy

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Low repetition rate, hybrid fiber/solid-state, 1064 nm picosecond master oscillator power amplifier laser system

Cited by 26 publications

References 26 publications

Narrow-bandwidth, picosecond, 1064-nm pumped optical parametric generator for the mid-IR based on HgGa2S4

Narrow-bandwidth, picosecond, 1064-nm pumped optical parametric generator for the mid-IR based on HgGa2S4

High gain fiber-solid hybrid double-passing end-pumped Nd:YVO4 picosecond amplifier with high beam quality*

Switchable Dual-Wavelength Mode-Locked Fiber Laser Source for In-PCF Parametric Frequency Conversion Applied to CARS Microscopy

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Product

Resources

About

High gain fiber-solid hybrid double-passing end-pumped Nd:YVO₄ picosecond amplifier with high beam quality*