Tunable dual-color operation of Yb:fiber laser via mechanical spectral subdivision

Fellinger, Jakob; Winkler, Georg; Mayer, A.; Steidle, Laurin R.; Heckl, Oliver H.

doi:10.1364/oe.27.005478

Cited by 34 publications

(10 citation statements)

References 28 publications

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“…Non-zero intra-cavity dispersion leads to a difference in repetition rate for the two emitted pulse trains. Based on state-of-the-art fiber lasers, the dual-color/dual-comb approach [19][20][21][22][23][24][25][26][27][28] shows great potential for spectroscopic measurements without the need for active stabilization of the comb parameters [22,23,27]. For instance, Zhao et al described a carbon nanotube modelocked dual-color erbium doped fiber laser [20], which then further evolved into a single-cavity dual-comb and enabled free-running spectroscopy [22].…”

Section: Introductionmentioning

confidence: 99%

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Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser

Fellinger¹,

Mayer²,

Winkler³

et al. 2019

Opt. Express

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We demonstrate dual-comb generation from an all-polarization-maintaining dualcolor ytterbium (Yb) fiber laser. Two pulse trains with center wavelengths at 1030 nm and 1060 nm respectively are generated within the same laser cavity with a repetition rate around 77 MHz. Dual-color operation is induced using a tunable mechanical spectral filter, which cuts the gain spectrum into two spectral regions that can be independently mode-locked. Spectral overlap of the two pulse trains is achieved outside the laser cavity by amplifying the 1030-nm pulses and broadening them in a nonlinear fiber. Spatially overlapping the two arms on a simple photodiode then generates a down-converted radio frequency comb. The difference in repetition rates between the two pulse trains and hence the line spacing of the down-converted comb can easily be tuned in this setup. This feature allows for a flexible adjustment of the tradeoff between non-aliasing bandwidth vs. measurement time in spectroscopy applications. Furthermore, we show that by fine-tuning the center-wavelengths of the two pulse trains, we are able to shift the down-converted frequency comb along the radio-frequency axis. The usability of this dual-comb setup is demonstrated by measuring the transmission of two different etalons while the laser is completely free-running.

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Section: Introductionmentioning

confidence: 99%

“…In recent work, we have demonstrated the implementation of a mechanical spectral filter to generate a tunable dual-color laser [26]. The method was implemented in a nonlinear polarization evolution (NPE) mode-locked Yb:fiber laser operating at 23 MHz.…”

Section: Introductionmentioning

confidence: 99%

Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser

Fellinger¹,

Mayer²,

Winkler³

et al. 2019

Opt. Express

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“…[ 12,13 ] Subsequently, similar fiber sources have been demonstrated in various spectral ranges with dual‐comb generation based on polarization‐multiplexing [ 14–16 ] or multiwavelength emission. [ 17–20 ] Despite these advances, the main drawback of soliton mode‐locked lasers based on all‐fiber technology is the limitation of their output power due to excessive nonlinearities, which typically reduces the achievable peak power below the kilowatt level. This in turn prevents their efficient nonlinear frequency conversion to other spectral ranges (e.g., mid‐IR), where many important chemical species have their strongest absorption features.…”

Section: Introductionmentioning

confidence: 99%

“…Historically, the first single-cavity dual-comb mode-locked laser was a 1.55 µm fiber oscillator operating in a bidirectional configuration [7,8]. Subsequently, similar fiber sources have been demonstrated in various spectral ranges with dual-comb generation based on polarizationmultiplexing [9][10][11] or multiwavelength emission [12][13][14][15]. Despite these advances, the main drawback of soliton mode-locked lasers based on all-fiber technology is the limitation of their output power due to excessive nonlinearities, which typically reduces the achievable peak power below the kilowatt level.…”

Section: Introductionmentioning

confidence: 99%

Dual‐Comb Femtosecond Solid‐State Laser with Inherent Polarization‐Multiplexing

Kowalczyk

Sterczewski

Zhang

et al. 2021

Laser & Photonics Reviews

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Dual‐comb spectroscopy is a rapidly developing technique enabling ultraprecise broadband optical diagnostics of atoms and molecules. This powerful tool typically requires two phase‐locked femtosecond lasers, yet it has been shown that it can be realized without any stabilization if the combs are generated from a single laser cavity. Still, unavoidable intrinsic relative phase fluctuations always set a limit on the precision of any spectroscopic measurements, hitherto limiting the applicability of bulk dual‐comb lasers for mode‐resolved studies. Here, a versatile concept for low‐noise dual‐comb generation from a single‐cavity femtosecond solid‐state laser based on intrinsic polarization‐multiplexing inside an optically anisotropic gain crystal is demonstrated. Due to intracavity spatial separation of the orthogonally polarized beams, two sub‐100 fs pulse trains are simultaneously generated from a 1.05 µm Yb:CNGS (calcium niobium gallium silicate) oscillator with a repetition rate difference of 4.7 kHz. The laser exhibits the lowest relative noise ever demonstrated for a bulk dual‐comb source, supporting free‐running mode‐resolved spectroscopic measurements over a second. Moreover, the developed dual‐comb generation technique can be applied to any solid‐state laser exploiting a birefringent active crystal, paving the way toward a new class of highly coherent, single‐cavity, dual‐comb laser sources operating in various spectral regions.

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“…The laser source used for this experiment is similar to the system presented in [4], however, the repetition rate of the laser is increased to around 92 MHz. A tuneable mechanical spectral filter [3] allows the all-PM laser to emit two independent pulse trains with different center wavelengths and slightly different repetition rates. As shown in [4], the two pulse trains may run in a different net intracavity dispersion regime each.…”

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confidence: 99%

Simple approach for extending the ambiguity-free-range of dual-comb ranging

Fellinger,

Winkler,

Aldia

et al. 2021

Preprint

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Dual-comb (DC) ranging is an established method for high-precision and high-accuracy distance measurements. It is, however, restricted by an inherent length ambiguity and the requirement for complex control loops for comb stabilization. Here, we present a simple approach for expanding the ambiguity-free measurement length of dual-comb ranging by exploiting the intrinsic intensity modulation of a single-cavity dual-color DC for simultaneous time-of-flight and DC distance measurements. This measurement approach enables the measurement of distances up to several hundred km with the precision and accuracy of a dual-comb interferometric setup while providing a high data acquisition rate (≈ 2 kHz) and requiring only the repetition rate of one of the combs to be stabilized.Recent progress in automation and metrology in various fields of application such as industrial robotics or autonomous transportation has led to an increasing demand for

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Tunable dual-color operation of Yb:fiber laser via mechanical spectral subdivision

Cited by 34 publications

References 28 publications

Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser

Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser

Dual‐Comb Femtosecond Solid‐State Laser with Inherent Polarization‐Multiplexing

Simple approach for extending the ambiguity-free-range of dual-comb ranging

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