P. St. J. Russell
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View article: Retiming dynamics of harmonically modelocked laser solitons in a self-driven optomechanical lattice
Retiming dynamics of harmonically modelocked laser solitons in a self-driven optomechanical lattice Open
Harmonic mode-locking, realized actively or passively, is an effective technique for increasing the repetition rate of lasers, with important applications in optical sampling, laser micro-machining and frequency metrology. It is critically…
View article: Optomagnetic forces on YIG/YFeO3 microspheres levitated in chiral hollow-core photonic crystal fibre
Optomagnetic forces on YIG/YFeO3 microspheres levitated in chiral hollow-core photonic crystal fibre Open
We explore a magnetooptomechanical system consisting of a single magnetic microparticle optically levitated within the core of a helically twisted single-ring hollow-core photonic crystal fibre. We use newly-developed magnetic particles th…
View article: Ultrafast optics in dispersion-flattened photonic crystal fiber
Ultrafast optics in dispersion-flattened photonic crystal fiber Open
llOfs pulses at 1550nm wavelength were launched in to various ultra flattened dispersion photonic crystal fibers. For output powers of around 100mW spectral components were generated in a range greater than 350-22OOnm.
View article: Frequency conversion of vortex states by chiral forward Brillouin scattering in twisted photonic crystal fibre
Frequency conversion of vortex states by chiral forward Brillouin scattering in twisted photonic crystal fibre Open
Optical vortex states-higher optical modes with helical phase progression and carrying orbital angular momentum-have been explored to increase the flexibility and capacity of optical fibres employed for example in mode-division-multiplexin…
View article: Protecting Quantum Modes in Optical Fibers
Protecting Quantum Modes in Optical Fibers Open
Polarization-preserving fibers maintain the two polarization states of an orthogonal basis. Quantum communication, however, requires sending at least two nonorthogonal states and these cannot both be preserved. We present an alternative sc…
View article: Protecting quantum modes in optical fibres
Protecting quantum modes in optical fibres Open
Polarization-preserving fibers maintain the two polarization states of an orthogonal basis. Quantum communication, however, requires sending at least two nonorthogonal states and these cannot both be preserved. We present a new scheme that…
View article: RIMFAX Ground Penetrating Radar Reveals Dielectric Permittivity and Rock Density of Shallow Martian Subsurface
RIMFAX Ground Penetrating Radar Reveals Dielectric Permittivity and Rock Density of Shallow Martian Subsurface Open
The Mars 2020 Perseverance Rover is equipped with the RIMFAX ground penetrating radar instrument which has been continuously surveying the shallow subsurface during the rover's journey. Within the first 379 mission days, we identify hyperb…
View article: In Situ Geologic Context Mapping Transect on the Floor of Jezero Crater From Mars 2020 Perseverance Rover Observations
In Situ Geologic Context Mapping Transect on the Floor of Jezero Crater From Mars 2020 Perseverance Rover Observations Open
In situ geologic context mapping based on rover and helicopter observations provides documentation of a nearly continuous record of geology and exposed surface structure over a 120 m‐wide corridor along the traverse of the Mars 2020/Persev…
View article: Valleytronics in bulk MoS$_2$ by optical control of parity and time symmetries
Valleytronics in bulk MoS$_2$ by optical control of parity and time symmetries Open
The valley degree of freedom of electrons in materials promises routes toward energy-efficient information storage with enticing prospects towards quantum information processing. Current challenges in utilizing valley polarization are symm…
View article: Selective phase filtering of charged beams with laser-driven antiresonant hollow-core fibers
Selective phase filtering of charged beams with laser-driven antiresonant hollow-core fibers Open
Emerging accelerator concepts increasingly rely on the combination of high-frequency electromagnetic radiation with electron beams, enabling longitudinal phase space manipulation which supports a variety of advanced applications. The hands…
View article: Compact Yb fiber few-cycle pulse source based on precision pulse compression and shaping with an adaptive fiber Bragg grating
Compact Yb fiber few-cycle pulse source based on precision pulse compression and shaping with an adaptive fiber Bragg grating Open
We generate bandwidth limited 10 µJ pulses of 92 fs pulse width using an adaptive fiber Bragg grating stretcher (FBG) in conjunction with a Lyot filter. The temperature controlled FBG is used to optimize the group delay, whereas the Lyot f…
View article: Optical Vortex Brillouin Laser
Optical Vortex Brillouin Laser Open
Optical vortices, which have been extensively studied over the last decades, offer an additional degree of freedom useful in many applications, such as optical tweezers and quantum control. Stimulated Brillouin scattering (SBS), providing …
View article: Temporal Self-Compression and Self-Frequency Shift of Submicrojoule Pulses at a Repetition Rate of 8 MHz
Temporal Self-Compression and Self-Frequency Shift of Submicrojoule Pulses at a Repetition Rate of 8 MHz Open
We combine soliton dynamics in gas-filled hollow-core photonic crystal fibers with a state-of-the-art fiber laser to realize a turn-key system producing few-fs pulses at 8 MHz repetition rate at pump energies as low as 220 nJ. Furthermore,…
View article: Localization of Light in Multi‐Helical Arrays of Discrete Coupled Waveguides
Localization of Light in Multi‐Helical Arrays of Discrete Coupled Waveguides Open
Localization of light in disordered or periodically structured dielectric media has been studied for many years. A recent example is coreless (i.e., defect‐free) photonic crystal fiber (PCF), which is observed to confine light when drawn i…
View article: Nonreciprocal vortex isolator via topology-selective stimulated Brillouin scattering
Nonreciprocal vortex isolator via topology-selective stimulated Brillouin scattering Open
Optical nonreciprocity, which breaks the symmetry between forward and backward propagating optical waves, has become vital in photonic systems and enables many key applications. So far, all the existing nonreciprocal systems are implemente…
View article: Erratum to “Bragg Reflection and Conversion Between Helical Bloch Modes in Chiral Three-Core Photonic Crystal Fiber”
Erratum to “Bragg Reflection and Conversion Between Helical Bloch Modes in Chiral Three-Core Photonic Crystal Fiber” Open
The dispersion relation for the helical Bloch modes in this paper contains an error, which affects Equation (3) in the original manuscript, as well as Fig. 2. Otherwise the conclusions of the paper are unaffected.
View article: Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars
Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars Open
The Perseverance rover landed in Jezero crater, Mars, to investigate ancient lake and river deposits. We report observations of the crater floor, below the crater’s sedimentary delta, finding that the floor consists of igneous rocks altere…
View article: Strong circular dichroism for the HE<sub>11</sub> mode in twisted single-ring hollow-core photonic crystal fiber: erratum
Strong circular dichroism for the HE<sub>11</sub> mode in twisted single-ring hollow-core photonic crystal fiber: erratum Open
Recent work has revealed that the dispersion relation, given in Optica 5 , 1315 ( 2018 ) 10.1364/OPTICA.5.001315 , for helical Bloch modes in a ring of capillaries surrounding a central hollow core, is incorrect. Here we correct this error…
View article: Temporal self-compression and self-frequency shift of sub-microjoule pulses at 8 MHz repetition rate
Temporal self-compression and self-frequency shift of sub-microjoule pulses at 8 MHz repetition rate Open
We combine soliton dynamics in gas-filled hollow-core photonic crystal fibers with a state-of-the-art fiber laser to realize a turn-key system producing few-fs pulses at 8 MHz repetition rate at pump energies as low as 220 nJ. Furthermore,…
View article: Roadmap on multimode photonics
Roadmap on multimode photonics Open
Multimode devices and components have attracted considerable attention in the last years, and different research topics and themes have emerged very recently. The multimodality can be seen as an additional degree of freedom in designing de…
View article: High-quality 8-fold self-compression of ultrashort near-UV pulses in Ar-filled ultrathin-walled photonic crystal fiber
High-quality 8-fold self-compression of ultrashort near-UV pulses in Ar-filled ultrathin-walled photonic crystal fiber Open
We demonstrate generation of 7.6 fs near-UV pulses centered at 400 nm via 8-fold soliton-effect self-compression in an Ar-filled hollow-core kagomé-style photonic crystal fiber with ultrathin core walls. Analytical calculations of the effe…
View article: Tunable and state-preserving frequency conversion of single photons in hydrogen
Tunable and state-preserving frequency conversion of single photons in hydrogen Open
Dataset for Tyumenev et al., "Tunable and state-preserving frequency conversion of single photons in hydrogen". The files include all raw data and numerical simulation codes used for the figures displayed in the main text and the supplemen…
View article: Tunable and state-preserving frequency conversion of single photons in hydrogen
Tunable and state-preserving frequency conversion of single photons in hydrogen Open
Dataset for Tyumenev et al., "Tunable and state-preserving frequency conversion of single photons in hydrogen". The files include all raw data and numerical simulation codes used for the figures displayed in the main text and the supplemen…
View article: Optical vortex Brillouin laser
Optical vortex Brillouin laser Open
Optical vortices, which have been extensively studied over the last decades, offer an additional degree of freedom useful in many applications, such as optical tweezers and quantum control. Stimulated Brillouin scattering, providing a narr…
View article: The Effects of Terrain Properties Upon the Small Crater Population Distribution at Giordano Bruno: Implications for Lunar Chronology
The Effects of Terrain Properties Upon the Small Crater Population Distribution at Giordano Bruno: Implications for Lunar Chronology Open
The distribution of impact craters on the ejecta of Giordano Bruno, a recent (<10 Ma) 22‐km diameter crater within the lunar highlands, exhibits substantial variations. We surveyed craters D ≥ 10 m across a 1,323 km 2 area of Giordano Brun…