Explanipedia

Line-by-line control of 10,000 modes in a 20 GHz laser frequency comb Open

W.H. Newman, Jake M. Charsley, Yuk Shan Cheng, Derryck T. Reid · 2025

The independent manipulation of each line in a laser frequency comb is a powerful resource for emerging applications in optical waveform synthesis, spectroscopy, quantum technology, microwave photonics, astrophotonics, and metrology. Previ…

Two-photon dual-comb LiDAR for precision ranging to non-optical targets Open

Hollie Wright, Alexander J. M. Nelmes, Derryck T. Reid · 2025

Two-photon dual-comb LiDAR (2phDCL) provides time-of-flight ranging at kHz update rates, with instantaneous precisions of a few µ m, and a data burden orders of magnitude lower than interferometric dual-comb methods. These capabilities mak…

Cross-dispersion spectrograph calibration using only a laser frequency comb Open

W.H. Newman, Jake M. Charsley, Jamie Slattery, Toby Mitchell, Kamalesh Dadi , et al. · 2024

High-resolution cross-dispersion spectrographs are widely used in spectroscopy, but the two-dimensional format of the spectrum requires sophisticated calibration, conventionally performed by illuminating the instrument with a broadband hol…

Mid-infrared optical coherence tomography with a stabilized OP-GaP optical parametric oscillator Open

Jake M. Charsley, C. Farrell, Marius Rutkauskas, Peter G. Schunemann, Derryck T. Reid · 2024

We demonstrate mid-infrared time-domain optical coherence tomography (OCT) with an orientation-patterned GaP optical parametric oscillator. Instantaneous broadband mid-infrared spectra provide reduced scattering for OCT applications includ…

Continuous ultraviolet to blue-green astrocomb Open

Yuk Shan Cheng, Kamalesh Dadi, Toby Mitchell, Samantha Thompson, Nikolai Piskunov , et al. · 2024

Automated control and stabilization of ultrabroadband laser pulse angular dispersion Open

Samuel Buck, Derryck T. Reid, M. Galimberti · 2024

We present an innovative automatic control of angular dispersion for high-power laser systems. A novel, to the best of our knowledge, diagnostic has been developed to visualize angular dispersion in ultrashort near-infrared laser pulses fo…

GPU-accelerated full-field modelling of highly dispersive ultrafast optical parametric oscillators Open

Sebastian C. Robarts, Diana V. Hunter, Derryck T. Reid, Richard A. McCracken · 2023

We demonstrate GPU-accelerated modelling of ultrafast optical parametric oscillators (OPOs) via the χ (2) nonlinear envelope equation with 1265× improvement in execution time compared with a CPU-based approach. Incorporating an adaptive st…

GPU-accelerated full-field modelling of highly dispersive ultrafast optical parametric oscillators Open

Sebastian C. Robarts, Diana Hunter, Derryck T. Reid, Richard A. McCracken · 2023

We demonstrate GPU-accelerated modelling of ultrafast optical parametric oscillators (OPOs) via the 𝜒(2) nonlinear envelope equation with 1265× improvement in execution time compared with a CPU-based approach. Incorporating an adaptive ste…

GPU-accelerated full-field modelling of highly dispersive ultrafast optical parametric oscillators Open

Sebastian C. Robarts, Diana Hunter, Derryck T. Reid, Richard A. McCracken · 2023

We demonstrate GPU-accelerated modelling of ultrafast optical parametric oscillators (OPOs) via the 𝜒(2) nonlinear envelope equation with 1265× improvement in execution time compared with a CPU-based approach. Incorporating an adaptive ste…

Fiber-delivered heterodyne spectroscopy with a mid-infrared frequency comb Open

Pablo Castro-Marín, Kerr Johnson, C. Farrell, Ian Davidson, Qiang Fu , et al. · 2023

By exploiting the excellent short-term phase stability between consecutive pulses from a free-running optical parametric oscillator frequency comb, we report the first example of hollow-core fiber-delivered heterodyne spectroscopy in the 3…

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Derryck T. Reid · 2023

https://www.outlookindia.com/outlook-spotlight/prodentim-official-website-price-update-2023-prodentim-truth-surprise-you-must-read-this-news-272517

Hong-Ou-Mandel interference with a diode-pumped 1-GHz Ti:sapphire laser Open

Imogen Morland, Hanna Ostapenko, Feng Zhu, Derryck T. Reid, Jonathan Leach · 2023

Correlated photon pairs generated through spontaneous parametric down-conversion (SPDC) are a key resource in quantum optics. In many quantum optics applications, such as satellite quantum key distribution (QKD), a compact, high repetition…

Continuous Ultraviolet to Blue-Green Astrocomb Open

Yuk Shan Cheng, Kamalesh Dadi, Toby Mitchell, Samantha Thompson, N. Piskunov , et al. · 2023

The characterization of Earth-like exoplanets and precision tests of cosmological models using next-generation telescopes such as the ELT will demand precise calibration of astrophysical spectrographs in the visible region, where stellar a…

Multi-target two-photon dual-comb LiDAR Open

Hollie Wright, Alexander J. M. Nelmes, Nick Weston, Derryck T. Reid · 2023

By substituting two-photon cross-correlation in a wide-bandgap photodiode for the coherent gating conventionally used in dual-comb ranging, two-photon dual-comb LiDAR exchanges data-intensive interferometric acquisition for a single time-s…

Reflecting the past, imag(in)ing the past: macro-reflection imaging of painting materials by fast MIR hyperspectral analysis Open

Michela Botticelli, Valentina Risdonne, Tess Visser, Christina Young, Margaret J. Smith , et al. · 2023

Imaging spectroscopy has been developed in the last two decades in the visible and infrared spectral range for detecting pigments and binders on paintings. The near-infrared (NIR) region has been proved effective for the discrimination of …

Hong-Ou-Mandel interference with a diode-pumped 1-GHz Ti:sapphire laser Open

Imogen Morland, Hanna Ostapenko, Feng Zhu, Derryck T. Reid, Jonathan Leach · 2023

Correlated photon pairs generated through spontaneous parametric down-conversion (SPDC) are a key resource in quantum optics. In many quantum optics applications, such as satellite quantum key distribution (QKD), a compact, high repetition…

Design, construction and characterisation of a diode-pumped, three-element, 1-GHz Kerr-lens-modelocked Ti:sapphire oscillator Open

Hanna Ostapenko, Toby Mitchell, Pablo Castro-Marín, Derryck T. Reid · 2023

We present a design and construction prescription for a 1-GHz repetition rate Ti:sapphire laser pumped with a single green pump diode and with a resonator comprising as few as three optical elements. In a three-element configuration, the l…

Misalignment-free, Kerr-lens-modelocked Yb:Y<sub>2</sub>O<sub>3</sub> 2.2-GHz oscillator, amplified by a semiconductor optical amplifier Open

Hanna Ostapenko, Ye Feng, Tobias P. Lamour, Richard A. McCracken, Oliver Mandel , et al. · 2022

We present a fully bonded, misalignment-free, diode-pumped Yb:ceramic (Yb:Y 2 O 3 ) oscillator producing 190-fs pulses at a repetition frequency of 2.185 GHz. Self-starting Kerr-lens-modelocked operation was obtained from both outputs of t…

Design, construction and characterisation of a diode-pumped, three-element, 1-GHz Kerr-lens-modelocked Ti:sapphire oscillator Open

Hanna Ostapenko, Toby Mitchell, Pablo Castro-Marín, Derryck T. Reid · 2022

We report a 1-GHz repetition rate Ti:sapphire laser pumped with a single green pump diode, producing 111-fs pulses and exhibiting self-starting Kerr-lens modelocking at pump powers above 850 mW. At 1.1W of pump power, the average output of…

Design of quasi-phase-matching nonlinear crystals based on quantum computing Open

Zihua Zheng, Sijie Yang, Derryck T. Reid, Zhiyi Wei, Jinghua Sun · 2022

Quasi-phase-matching (QPM) makes it possible to design domain engineered nonlinear crystals for highly efficient and multitasking nonlinear frequency conversion. However, finding the optimal crystal domain arrangement in a meaningful time …

Feed-forward stabilization of a single-frequency, diode-pumped Pr:YLF-Cr:LiCAF laser operating at 813.42 nm Open

Yuk Shan Cheng, Bence Szutor, Derryck T. Reid · 2022

We introduce a simple and compact diode-pumped Pr:YLF-Cr:LiCAF laser, operating at 813.42 nm and providing a 130-mW, single-frequency output tunable over a 3-GHz range. The laser has a short-term intrinsic linewidth estimated to be 700 Hz …

Three-element, self-starting Kerr-lens-modelocked 1-GHz Ti:sapphire oscillator pumped by a single laser diode Open

Hanna Ostapenko, Toby Mitchell, Pablo Castro-Marín, Derryck T. Reid · 2022

We present a Kerr-lens-modelocked, three-element, diode-pumped Ti:sapphire laser producing 111-fs pulses at a repetition frequency of 1.02 GHz. Self-starting soliton-modelocked operation with an output power of 106 mW was obtained when the…

Compressive hyperspectral imaging in the molecular fingerprint band Open

Jake M. Charsley, Marius Rutkauskas, Yoann Altmann, Valentina Risdonne, Michela Botticelli , et al. · 2022

Spectrally-resolved imaging provides a spectrum for each pixel of an image that, in the mid-infrared, can enable its chemical composition to be mapped by exploiting the correlation between spectroscopic features and specific molecular grou…

Hollow-core fiber delivery of broadband mid-infrared light for remote spectroscopy Open

Kerr Johnson, Pablo Castro-Marín, C. Farrell, Ian Davidson, Qiang Fu , et al. · 2022

High-resolution multi-species spectroscopy is achieved by delivering broadband 3–4-μm mid-infrared light through a 4.5-meter-long silica-based hollow-core optical fiber. Absorptions from H 37 Cl, H 35 Cl, H 2 O and CH 4 present in the gas …

Self-Starting Kerr-Lens-Modelocked 1-GHz Ti:sapphire Oscillator Pumped by a Single Laser Diode Open

Hanna Ostapenko, Toby Mitchell, Pablo Castro-Marín, Derryck T. Reid · 2022

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Femtosecond Optical Parametric Oscillators and Frequency Combs Open

Derryck T. Reid · 2022

Femtosecond Optical Parametric Oscillators and Frequency Combs1 ,0&( 740(,-$@5 ),456 '(/10564$6,10 ,0 1) $ 5;0&+410175.;27/2(' 126,&$.2$4$/(64,& 15&,..$614 " # 6+,5 6(&+01.1*;+$5 (81.8(' $0' /$674(' &105,'(4$%.; 12(0,0* $22.,&$6,105 ,0 /7.…

The ESO’s Extremely Large Telescope Working Groups Open

P. Padovani, Michele Cirasuolo, R. F. J. van der Burg, F. Cantalloube, E. M. George , et al. · 2022

Since 2005 ESO has been working with its community and industry to develop an extremely large optical/infrared telescope. ESO’s Extremely Large Telescope, or ELT for short, is a revolutionary ground-based telescope that will have a 39-metr…

Dynamic measurements at up to 130-kHz sampling rates using Ti:sapphire dual-comb distance metrology Open

Toby Mitchell, Jinghua Sun, Derryck T. Reid · 2021

By using fully-locked Ti:sapphire combs operating with repetition-frequencies of 513 MHz, we demonstrate high-speed dual-comb distance metrology with update rates up to 130 kHz, equivalent to a sampling interval of 7.7 µs. This measurement…

Two-photon dual-comb LiDAR Open

Hollie Wright, Jinghua Sun, David McKendrick, Nick Weston, Derryck T. Reid · 2021

The interferometric signals produced in conventional dual-comb laser ranging require femtosecond lasers with long-term carrier-envelope offset frequency stability, and are limited to an upper sampling rate by radio-frequency aliasing consi…

Towards a space-qualified Kerr-lens mode-locked laser Open

Ye Feng, Tobias P. Lamour, Hanna Ostapenko, Richard A. McCracken, Oliver Mandel , et al. · 2021

We report a 1.5-GHz Kerr-lens mode-locked (KLM) Yb: ring laser constructed by directly bonding the cavity components onto an aluminum baseplate. Stable unidirectional operation with an output power was obtained for p…

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