Seyed Mohammad Abokhamis Mousavi

University of Southampton

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Co-Authors

Francesco Poletti

University of Southampton

David J. Richardson

University of Southampton

Eric Numkam Fokoua

University of Southampton

Gregory T. Jasion

University of Southampton

J. R. Hayes

University of Southampton

S. R. Sandoghchi

University of Southampton

Natalie V. Wheeler

University of Southampton

Thomas D. Bradley

Eindhoven University of Technology

Austin Taranta

University of Southampton

Ian Davidson

University of Southampton

Cooperative Institutions

University of Southampton

Honeywell (United States)

Nanyang Technological University

Microsoft Research (United Kingdom)

Lumen (United Kingdom)

Optica

University of Bath

University of Padua

K.N.Toosi University of Technology

Czech Technical University in Prague

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High power Raman second stokes generation in a methane filled hollow core fiber

Optics Express (2023)

Ann Lanari Hans Christian Hansen Mulvad Seyed Mohammad Abokhamis Mousavi Ian Davidson Qiang Fu

We demonstrate a multi-watt, picosecond pulse duration laser source by exploiting a cascaded Raman process to the second Stokes signal at a wavelength of 2.58 μm in a methane-filled Nested Anti-Resonant Nodeless fiber from a 1 μm disk laser source. A maximum average power of 2.89 W (14.45 μJ) is produced in a 160 cm length of custom-designed and in-house fabricated fiber filled with methane at a pressure of 2 bar. The impact of gas pressure and propagation distance on the second Stokes signal power are investigated experimentally. The experimental results are simulated by solving the Generalized Nonlinear Schrodinger Equation with the experiment carefully modelled by accounting for the impacts of pressure dependent gas-light interactions along the pressure gradient of the fiber. This work offers a laser source for a variety of applications as well as expanding the modelling space to methane filled fibers including pressure gradients, and nonlinear optical activity in the presence of infrared gas absorption.

Picosecond

Bar (unit)

SIGNAL (programming language)

10.1364/oe.503620

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Citations (7)

A Novel Approach to Coupled-Mode Analysis of Geometric Deformations in Reciprocal Waveguides

Gianluca Guerra Seyed Mohammad Abokhamis Mousavi Austin Taranta Eric Numkam Fokoua Marco Santagiustina

We present an approach to treat geometric perturbations in coupled-mode analysis for reciprocal waveguides. Geometric perturbations are converted into material ones and a coupled-mode theory for material perturbations is used to assess the propagation. The method is tested on an elliptically deformed antiresonant fiber.

Reciprocal

Mode (computer interface)

Coupled mode theory

10.1109/ecoc48923.2020.9333133

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Citations (1)

Novel hollow core fibers for ultra-high power delivery

2022 IEEE Photonics Conference (IPC) (2017)

Natalie V. Wheeler Y. Chen J. R. Hayes Thomas D. Bradley Hans Christian Hansen Mulvad

We review and compare recent hollow core photonic crystal fibers, both bandgap-guiding and anti-resonant, which were designed and fabricated for high power laser delivery applications.

Photonic bandgap

10.1109/ipcon.2017.8116105

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From coherent polarization control to chiral mirrors and perfect absorbers

Eric Plum Seyed Mohammad Abokhamis Mousavi J. Shi Kevin F. MacDonald Nikolay I. Zheludev

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Exploring the Effect of the Core Boundary Curvature in Hollow Antiresonant Fibers

IEEE Photonics Technology Letters (2016)

Lieke D. van Putten Eric Numkam Fokoua Seyed Mohammad Abokhamis Mousavi Walter Belardi Subhasis Chaudhuri

Through numerical simulations, we systematically study the leakage loss properties of a simplified novel hollow antiresonant fiber in which the core is surrounded by semi-elliptical elements. These studies lead to new insight into the effect of the curvature of the core boundary in antiresonant fibers. We observe in particular that in our design, there exists an optimum curvature of the elements-which we quantify simply through the aspect ratio of the ellipses-for which the fiber's leakage loss is minimized. Furthermore, it is shown that elliptical elements can lead to orders of magnitude loss reduction as compared with similar fibers with circular ones.

Ellipse

Negative curvature

Leakage (economics)

10.1109/lpt.2016.2644198

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Citations (25)

Coherent control of metamaterial functionalities

Xiaochuan Fang Seyed Mohammad Abokhamis Mousavi Jinhui Shi Eric Plum Kevin F. MacDonald

Engaging the coherent interaction of electromagnetic waves on metamaterial nanostructures allows for the efficient and ultrafast optical control of a huge range of optical phenomena from absorption to refraction, from optical activity to anisotropy. We outline this new concept and provide a number of experimental demonstrations of coherent control phenomena alongside discussing their spectroscopic and optical data processing applications.

Coherent control

Photonic metamaterial

Negative Refraction

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Single-Mode, UV-Visible Guiding Hollow-Core Fibers

Ian Davidson Greg Jackson Seyed Mohammad Abokhamis Mousavi Eric Numkam Fokoua Thomas W. Kelly

The flexible delivery of UV-visible light is vital for many applications. Here we report the development of a new fabrication approach that allows broadband UV-visible guiding hollow-core fibers, with performance levels that approach or exceed commercial single-mode fibers, to be produced.

Visible spectrum

Mode (computer interface)

10.1109/sum57928.2023.10224390

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Optimizing the curvature of elliptical cladding elements to reduce leakage loss in antiresonant hollow core fibres

Lieke Van Putten Eric Numkam Fokoua Francesco Poletti Walter Belardi Seyed Mohammad Abokhamis Mousavi

We study systematically the effect of the curvature of glass membranes on the confinement loss of an antiresonant negative curvature hollow core fibre. Optimum curvatures are found that can reduce the fibre loss by orders of magnitude.

Cladding (metalworking)

Negative curvature

Leakage (economics)

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Record Drift Performance in a Hollow-Core Resonator Fiber Optic Gyroscope Using Anti-Resonant Fiber

Glen A. Sanders Austin Taranta C. Narayanan Eric Numkam Fokoua Seyed Mohammad Abokhamis Mousavi

Resonator Fiber Gyroscope (RFOG) performance has hitherto been limited by non- linearity, modal impurity, and backscattering in sensing fibers. By employing high-performance anti-resonant fiber, we show dramatically improved long-term stability (>500x) over prior hollow- core fiber RFOGs.

Fibre optic gyroscope

Fiber Bragg Grating

10.1364/ofs.2020.w3.4

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Citations (1)

Kilowatt-peak-power Green Pulse Delivery over Hundred-meter Scale Lengths of Hollow-Core Fiber

Conference on Lasers and Electro-Optics (2022)

Qiang Fu Ian Davidson Seyed Mohammad Abokhamis Mousavi Lin Xu Natalie V. Wheeler

We report on the delivery of kilowatt-peak-power and watt-average-power green laser pulses through single-ring hollow-core fibers up to 300-m-long. The delivered beams are near-diffraction limited with M 2 factor <1.1.

10.1364/cleo_si.2022.sw4k.8

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Citations (1)