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Your search keyword '"Abubakar, I."' showing total 18 results
Start Over Author "Abubakar, I." Publisher optica publishing group
18 results on '"Abubakar, I."'

2. Stability performance of active gas-filled hollow-core antiresonant fiber lasers

Author

Ole Bang, Manoj Kumar Dasa, Jose Enrique Antonio-Lopez, Christos Markos, Md. Selim Habib, Yazhou Wang, Rodrigo Amezcua-Correa, and Abubakar I. Adamu

Subjects
Hollow core, Materials science, business.industry, Infrared, Physics::Optics, Laser, Stability (probability), Low noise, law.invention, symbols.namesake, law, Fiber laser, symbols, Optoelectronics, Physics::Atomic Physics, Fiber, business, Raman spectroscopy
Abstract

The stability of infrared gas-filled fiber Raman lasers is investigated for the first time. It reveals that high pulse energy leads to low noise, while the associated high heat release compromises the laser's long-term stability.

Published
2021
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3. Frequency comb-like high energy gas-filled fiber Raman laser spanning from 1.68 μm to 2.4 μm

Author

Manoj Kumar Dasa, Ole Bang, Christos Markos, Md. Selim Habib, Yazhou Wang, Jose Enrique Antonio-Lopez, Rodrigo Amezcua-Correa, and Abubakar I. Adamu

Subjects
High energy, Frequency comb, Materials science, Raman laser, High power lasers, business.industry, Fiber laser, Optoelectronics, Fiber, business, Laser beams, Pulse (physics)
Abstract

A Raman laser with distinct lines at 1683, 1868, 2099, and 2394 nm is reported based on a hydrogen-filled nested anti-resonant fiber, with high pulse energies of 18.25, 14.4, 14.1, and 8.2 µJ, respectively.

Published
2021
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11. Mid-IR gas-filled Raman fiber laser at 4.22 μm with high pulse energy and efficiency

Author

Rodrigo Amezcua-Correa, Ole Bang, Yazhou Wang, Jose Enrique Antonio-Lopez, Christos Markos, Selim Habib, Abubakar I. Adamu, and Manoj Kumar Dasa

Subjects
Materials science, business.industry, symbols.namesake, Raman laser, Fiber laser, symbols, Optoelectronics, Quantum efficiency, Fiber, Pulse energy, business, Raman spectroscopy, Line (formation), Bar (unit)
Abstract

A mid-IR 4.22 µm Raman laser targeting CO2 absorption line is reported based on a hydrogen-filled hollow-core fiber. Quantum efficiency as high as 74% was achieved at 20 bar with 17.6 µJ pulse energy.

Published
2020
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12. Noise Investigation of Deep-UV Dispersive Wave Generation in Gas-Filled Fiber Utilizing Nonlinear Pulse Compression

Author

Mattia Michieletto, Peter M. Moselund, Ole Bang, Callum R. Smith, Asbjørn Moltke, Patrick Bowen, Christos Markos, and Abubakar I. Adamu

Subjects
Nonlinear system, Optics, Materials science, Band-pass filter, business.industry, Relative intensity noise, Pulse compression, Physics::Optics, Fiber, Photonics, Radiation, business, Noise (radio)
Abstract

Deep-UV radiation is achieved through dispersive wave generation in an argon-filled anti-resonant fiber utilizing a nonlinearly compressed 1030nm pump. Relative intensity noise is characterized at 280nm, with 1.6% achieved for optimal argon-pressure and pump parameters.

Published
2020
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13. Noble and Raman-active Gas-Filled Hollow-Core Fiber Lasers

Author

Ole Bang, Christos Markos, Yazhou Wang, Rodrigo Amezcua-Correa, and Abubakar I. Adamu

Subjects
Hollow core, symbols.namesake, Materials science, business.industry, law, Fiber laser, symbols, Optoelectronics, Fiber, business, Laser, Raman spectroscopy, law.invention
Abstract

We present the generation of mid-IR light in anti-resonant hollow-core fiber using Raman-active gas for 4.2µm laser and Raman-inactive gas for multi-octave SC spanning from 200 nm to 4µm.

Published
2020
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18. High pulse energy and quantum efficiency mid-infrared gas Raman fiber laser targeting CO 2 absorption at 4.2  µm.

Author

Wang Y, Dasa MK, Adamu AI, Antonio-Lopez JE, Habib MS, Amezcua-Correa R, Bang O, and Markos C

Abstract

In this Letter, we demonstrate a high pulse energy and linearly polarized mid-infrared Raman fiber laser targeting the strongest absorption line of ${\rm CO}_2$CO 2 at $\sim{4.2}\;\unicode {x00B5} {\rm m}$∼4.2µm. This laser was generated from a hydrogen (${\rm H}_2$H 2 )-filled antiresonant hollow-core fiber, pumped by a custom-made 1532.8 nm Er-doped fiber laser delivering 6.9 ns pulses and 11.6 kW peak power. A quantum efficiency as high as 74% was achieved, to yield 17.6 µJ pulse energy at 4.22 µm. Less than 20 bar ${\rm H}_2$H 2 pressure was required to maximize the pulse energy since the transient Raman regime was efficiently suppressed by the long pump pulses.

Published
2020
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