Carolin P. Bauer


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Bauer

First Name

Carolin P.

ORCID

0000-0003-0428-9967

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2021 - 202522
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Publications 1 - 10 of 22
  • Picosecond ultrasonics with a free-running dual-comb laser
    Item type: Journal Article
    Pupeikis, Justinas; Willenberg, Benjamin; Bruno, Francois; et al. (2021)
    Optics Express
    We present a free-running 80-MHz dual-comb polarization-multiplexed solid-state laser which delivers 1.8 W of average power with 110-fs pulse duration per comb. With a high-sensitivity pump-probe setup, we apply this free-running dual-comb laser to picosecond ultrasonic measurements. The ultrasonic signatures in a semiconductor multi-quantum-well structure originating from the quantum wells and superlattice regions are revealed and discussed. We further demonstrate ultrasonic measurements on a thin-film metalized sample and compare these measurements to ones obtained with a pair of locked femtosecond lasers. Our data show that a free-running dual-comb laser is well-suited for picosecond ultrasonic measurements and thus it offers a significant reduction in complexity and cost for this widely adopted non-destructive testing technique.
  • Dual-comb optical parametric oscillator with low noise pumped by free-running dual-comb laser
    Item type: Other Conference Item
    Phillips, Christopher R.; Bauer, Carolin P.; Pupeikis, Justinas; et al. (2022)
    Proceedings of SPIE ~ Nonlinear Frequency Generation and Conversion: Materials and Devices XXI
    We present a new approach for dual-comb optical parametric oscillators. The system uses a single-cavity dual-comb laser that pumps a single OPO cavity. The pump has 1.7 W average power per comb at 1054 nm with 80-MHz repetition rate. The OPO ring cavity is pumped in opposite directions by the two pumps. The idler beams have >280 mW average power at 3500 nm with 145-nm bandwidth. We characterize the signal noise and find shot-noise-limited performance (RIN below -155 dBc/Hz at >1 MHz frequencies). Our approach represents a low-noise solution to dual-comb spectroscopy across the short-wave infrared and mid-infrared spectral regions.
  • Free-running single-cavity dual-comb optical parametric oscillator in the mid-infrared
    Item type: Other Conference Item
    Bauer, Carolin P.; Pupeikis, Justinas; Willenberg, Benjamin; et al. (2021)
  • Dual-comb optical parametric oscillator in the mid-infrared based on a single free-running cavity
    Item type: Journal Article
    Bauer, Carolin P.; Camenzind, Sandro L.; Pupeikis, Justinas; et al. (2022)
    Optics Express
    We demonstrate a free-running single-cavity dual-comb optical parametric oscillator (OPO) pumped by a single-cavity dual-comb solid-state laser. The OPO ring cavity contains a single periodically-poled MgO-doped LiNbO3 (PPLN) crystal. Each idler beam has more than 245-mW average power at 3550 nm and 3579 nm center wavelengths (bandwidth 130 nm). The signal beams are simultaneously outcoupled with more than 220 mW per beam at 1499 nm and 1496 nm center wavelength. The nominal repetition rate is 80 MHz, while the repetition rate difference is tunable and set to 34 Hz. To evaluate the feasibility of using this type of source for dual-comb applications, we characterize the noise and coherence properties of the OPO signal beams. We find ultra-low relative intensity noise (RIN) below -158 dBc/Hz at offset frequencies above 1 MHz. A heterodyne beat note measurement with a continuous wave (cw) laser is performed to determine the linewidth of a radio-frequency (RF) comb line. We find a full-width half-maximum (FWHM) linewidth of around 400 Hz. Moreover, the interferometric measurement between the two signal beams reveals a surprising property: the center of the corresponding RF spectrum is always near zero frequency, even when tuning the pump repetition rate difference or the OPO cavity length. We explain this effect theoretically and discuss its implications for generating stable low-noise idler combs suitable for high-sensitivity mid-infrared dual-comb spectroscopy (DCS).
  • Towards high-sensitivity mid-IR dual-comb spectroscopy via solid-state laser driven optical parametric oscillators
    Item type: Other Conference Item
    Bauer, Carolin P.; Pupeikis, Justinas; Willenberg, Benjamin; et al. (2022)
    OSA Technical Digest ~ Conference on Lasers and Electro-Optics
    We demonstrate a dual-comb 80-MHz optical parametric oscillator from a single-cavity and a diode-pumped 250-MHz Yb:YAG dual-comb oscillator. Their combination can lead to a low-noise source in the mid-IR with high-power per comb line.
  • Dual-comb spectroscopy of C2H2 in SWIR using a 250-MHz optical parametric oscillator
    Item type: Other Conference Item
    Bauer, Carolin P.; Pupeikis, Justinas; Willenberg, Benjamin; et al. (2022)
    OSA Technical Digest ~ Optica Advanced Photonics Congress 2022
    We demonstrate coherent dual-comb spectroscopy of C2H2 at 1520 nm using a spatially- multiplexed dual-comb 250-MHz OPO from a linear single-cavity. The repetition-rate difference is 15.4 kHz. Each signal comb has >125-mW average power.
  • Mid-IR dual-comb spectroscopy of acetylene using a 250-MHz optical parametric oscillator
    Item type: Other Conference Item
    Bauer, Carolin P.; Willenberg, Benjamin; Pupeikis, Justinas; et al. (2023)
    Technical Digest Series ~ Optica Sensing Congress 2023 (AIS, FTS, HISE, Sensors, ES)
    We demonstrate coherent dual-comb spectroscopy of acetylene at 3070 nm using a spatially-multiplexed dual-comb 250-MHz OPO from a linear single-cavity. The idler is broadly tunable (2900-5170 nm) at high powers per comb line (>120 μW).
  • Towards high sensitivity spectroscopy with single-cavity dual-comb lasers and OPOs
    Item type: Other Conference Item
    Phillips, Christopher R.; Bauer, Carolin P.; Pupeikis, Justinas; et al. (2023)
    Proceedings of SPIE ~ Nonlinear Frequency Generation and Conversion: Materials and Devices XXII
    We present a low-noise and high power per comb line dual-comb source based on a PPLN OPO and an Yb:YAG pump. Both the laser and OPO are spatially-multiplexed single-cavity dual-comb sources. The system operates at a repetition rate of 250 MHz, and the relatively long pump pulse duration of around 900 fs leads to a high power per comb line of >60 μW in the idler at 3500 nm. The idler is tunable from 2900 nm to 4170 nm. The system runs at over 15 kHz repetition rate difference, enabling comb-line-resolved dual-comb spectroscopy measurements in free-running operation.
  • High-Contrast Dual-Comb Optical Parametric Oscillator at 250-MHz
    Item type: Conference Paper
    Bauer, Carolin P.; Bollier, Michelle K.; Pupeikis, Justinas; et al. (2023)
    Technical Digest Series ~ Advanced Solid State Lasers 2023
    We demonstrate a high-contrast spatially-multiplexed dual-comb 250-MHz OPO from a linear single-cavity ideally suited for high-sensitivity dual-comb spectroscopy measurements. The achieved contrast lies at 7.0×10⁻⁵.
  • High-Peak Power Polarization-Multiplexed Yb:CaF2 Dual-Comb Solid-State Laser with 100-fs Pulse Duration
    Item type: Conference Paper
    Pupeikis, Justinas; Willenberg, Benjamin; Bauer, Carolin P.; et al. (2021)
    2021 Conference on Lasers and Electro-Optics (CLEO)
    We demonstrate a diode-pumped Yb:CaF2 dual-comb oscillator at 80-MHz repetition rate. The common-path polarization-multiplexed cavity delivers >2.1 W of output power in each comb with 100-fs pulse duration exceeding 230-kW peak power.
Publications 1 - 10 of 22