Atmospheric dispersion management in mid-IR mode-locked oscillators

Sorokin, Evgeni; Руденков, А.С.; Tolstik, Nikolai; KALASHNIKOV, VLADIMIR; DEMESH, MAKSIM; Sorokina, Irina T.

doi:10.1364/oe.488683

Opt. Express

2023

DOI: 10.1364/oe.488683

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Atmospheric dispersion management in mid-IR mode-locked oscillators

Evgeni Sorokin¹,

А.С. Руденков²,

Nikolai Tolstik³

et al.

Abstract: The atmospheric dispersion in the mid-infrared transparency windows presents an important albeit often neglected factor when developing ultrashort-pulsed lasers. We show that it can amount to hundreds of fs2 in 2–3 µm window with typical laser round-trip path lengths. Using the Cr:ZnS ultrashort-pulsed laser as a test-bed, we demonstrate the atmospheric dispersion influence on femtosecond and chirped-pulse oscillator performance and show that the humidity fluctuations can be compensated by an active dispersion… Show more

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2024

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Cited by 3 publications

References 26 publications

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Dissipative Soliton Resonance: Adiabatic Theory and Thermodynamics

Kalashnikov,

Rudenkov,

Sorokin

et al. 2024

J Nonlinear Math Phys

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We present the adiabatic theory of dissipative solitons (DS) of complex cubic-quintic nonlinear Ginzburg–Landau equation (CQGLE). Solutions in the closed analytical form in the spectral domain have the shape of Rayleigh–Jeans distribution for a positive (normal) dispersion. The DS parametric space forms a two-dimensional (or three-dimensional for the complex quintic nonlinearity) master diagram connecting the DS energy and a universal parameter formed by the ratio of four real and imaginary coefficients for dissipative and non-dissipative terms in CQGLE. The concept of dissipative soliton resonance (DSR) is formulated in terms of the master diagram, and the main signatures of transition to DSR are demonstrated and experimentally verified. We show a close analogy between DS and incoherent (semicoherent) solitons with an ensemble of quasi-particles confined by a collective potential. It allows applying the thermodynamical approach to DS and deriving the conditions for the DS energy scalability.

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Dissipative Soliton Resonance: Adiabatic Theory and Thermodynamics

Kalashnikov,

Rudenkov,

Sorokin

et al. 2024

J Nonlinear Math Phys

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Mid-infrared ultrafast soliton molecules from a few-cycle Cr:ZnS laser

Zhang,

Wang,

et al. 2024

Opt. Express

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Soliton molecules, or soliton bound states, are envisioned to make far-reaching changes in both fundamental research and applications. Here, we report on the generation and precision manipulation of soliton molecules based on a Kerr-lens mode-locked single-crystal Cr:ZnS laser at 2.4 µm. In the classical soliton regime, self-starting near-transform-limited pulses with a duration of 37 fs, less than 5 optical cycles, have been obtained at a repetition frequency of 173 MHz and an average output power of 572 mW. By fine-tuning the cavity group-delay dispersion profile, bi-soliton states with pulse durations between 55 fs and 98 fs with temporal separations between 348 fs and 604 fs have been observed and characterized. These are the shortest pulse duration and separation of soliton molecules reported so far in the mid-infrared region, to the best of our knowledge. With the ability of precision manipulation of soliton molecules generated on a sub-100-fs timescale, the tunable mid-infrared soliton molecule source paves the way for applications in the fields of telecommunications and ultrafast laser technologies.

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SESAM-assisted Kerr-lens mode-locked Cr:ZnS laser

Kowalczyk,

Davydenko,

Sotor

2024

Opt. Lett.

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Mode-locking in Cr:ZnS/Se lasers typically rely on Kerr-lensing (KLM) or a semiconductor saturable absorber mirror (SESAM). The former allows generation of shorter pulses, but, unlike the latter, does not support self-starting mode-locking. Here, we combine the advantages of these two techniques and demonstrate the SESAM-assisted KLM Cr:ZnS laser. Our self-starting oscillator generates up to 1 W of average power with 54 fs pulses at a central wavelength of 2360 nm. We identify a general limitation for further pulse shortening in SESAM mode-locked Cr:ZnS/Se lasers, which is related to the finite operation bandwidth of the semiconductor absorbers. In our experiment, we fully exploit the potential of commercially available GaSb SESAMs and fill their entire reflection bands. Furthermore, we compare the performance of a SESAM-assisted KLM laser with a pure KLM oscillator producing broadband, yet not self-starting, 33 fs pulses with 780 mW power. We also show that the choice of saturable absorbers has a negligible impact on the laser intensity noise, which is exceptionally low with sub-0.005% integrated noise.

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Atmospheric dispersion management in mid-IR mode-locked oscillators

Cited by 3 publications

References 26 publications

Dissipative Soliton Resonance: Adiabatic Theory and Thermodynamics

Dissipative Soliton Resonance: Adiabatic Theory and Thermodynamics

Mid-infrared ultrafast soliton molecules from a few-cycle Cr:ZnS laser

SESAM-assisted Kerr-lens mode-locked Cr:ZnS laser

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