Dr. Nicolas von Bandel Profile

Dr. Nicolas von Bandel

System Engineer at Mauna Kea Technologies

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Publications (6)

Proceedings Article | 26 January 2018 Presentation + Paper

Results of very long time ageing tests of DFB ridge laser diodes emitting at 852 nm and 894 nm for Cesium atomic clocks

P. Resneau, N. Von Bandel, M. Garcia, Y. Robert, E. Vinet, O. Parillaud, M. Krakowski

Proceedings Volume 10540, 105402E (2018) https://doi.org/10.1117/12.2286657

KEYWORDS: Cesium, Semiconductor lasers, Clocks, Atomic clocks, Reliability, Laser damage threshold, Resistance, Bragg gratings, Quantum wells, Magnetism

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Time and Frequency applications need high accuracy and high stability clocks. Optically pumped compact industrial Cesium atomic clocks are a promising approach that could satisfy these demands. However, the stability of these clocks relies, among others, on the performances of the laser diodes that are used. This issue has led the III-V Lab to commit to the European Euripides-LAMA project that aims to provide competitive compact optical Cesium clocks for ground applications. This work will provide key experience for further space technology qualification. III-V Lab was in charge of the design, fabrication and reliability of Distributed- Feedback diodes (DFB) at 894 nm (D1 line of Cesium) and 852 nm (D2 line). The use of D1 line for pumping will provide simplified clock architecture compared to the D2 line pumping thanks to simpler atomic transitions and a larger spectral separation between lines in the 894 nm case. Also, D1 line pumping overcomes the issue of unpumped “idle states” that occur with D2 line. The modules should provide narrow linewidth (<1 MHz), very good reliability in time and, crucially, be less sensitive to optical feedback. We show here results from Al-free active region with InGaAsP quantum well Ridge DFB lasers. We obtain the D1 Cs line (894.4nm) at 67°C and 165mA (optical power of 40mW) with a high side mode suppression ratio. The D2 Cs line (852.1nm) is obtained at room temperature at 40mW. By a small increase of temperature it is also possible to get Cs lines at 20mW. In order to address the long term reliability of these lasers, long duration ageing tests (more than one year targeted) have been carried out for both wavelengths at 20mW and 25°C The laser diodes have aged during 10 000 hours and 9336 hours for DFB addressing Cesium D2 and D1 lines, respectively. These ageing tests show very low increase of the operating current, almost linear with time. Lasers designed for D1 and D2 Cesium lines show an average increase of operating current of 0.15% and 0.37% per 1000hours, respectively.

Proceedings Article | 25 September 2017 Open Access

Engineering model of the optical space CS clock

R. Schmeissner, P. Favard, P. Dufreche, A. Douahi, Y. Folco, G. Guibaud, N. von Bandel, O. Parillaud, M. Garcia, M. Krakowski, G. Baili, A. Romer, F. Chastellain, W. Coppoolse, S. Guérandel, P. Perez, N. Mestre, M. Baldy

Proceedings Volume 10562, 105625I (2017) https://doi.org/10.1117/12.2296164

KEYWORDS: Semiconductor lasers, Clocks, Laser optics, Cesium, Astronomical imaging, Sensors, Autoregressive models, Photodiodes, Packaging, Resonators

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Proceedings Article | 27 January 2017 Presentation + Paper

Long time ageing tests of DFB ridge laser diodes emitting at 852nm and 894nm for cesium atomic clocks

P. Resneau, N. von Bandel, M. Garcia, M. Lecomte, Y. Robert, E. Vinet, O. Drisse, O. Parillaud, M. Krakowski

Proceedings Volume 10111, 1011132 (2017) https://doi.org/10.1117/12.2252608

KEYWORDS: Laser damage threshold, Quantum wells, Fiber Bragg gratings, Laser development, Cesium, Semiconductor lasers, Clocks, Reliability, Atomic clocks, Optical pumping

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Proceedings Article | 13 February 2016 Paper

DFB-ridge laser diodes at 894 nm for Cesium atomic clocks

N. von Bandel, M. Garcia, M. Lecomte, A. Larrue, Y. Robert, E. Vinet, O. Driss, O. Parrilaud, M. Krakowski, F. Gruet, R. Matthey, G. Mileti

Proceedings Volume 9755, 97552K (2016) https://doi.org/10.1117/12.2209502

KEYWORDS: Optical pumping, Cesium, Semiconductor lasers, Clocks, Atomic clocks, Reliability, Technetium, Laser damage threshold, Quantum wells, Etching

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Proceedings Article | 10 March 2015 Paper

Al-free active region laser diodes at 894 nm for compact Cesium atomic clocks

N. Von Bandel, Joseph Bebe Manga Lobe, M. Garcia, A. Larrue, Y. Robert, E. Vinet, M. Lecomte, O. Drisse, O. Parillaud, M. Krakowski

Proceedings Volume 9382, 93820L (2015) https://doi.org/10.1117/12.2076750

KEYWORDS: Semiconductor lasers, Cesium, Clocks, Atomic clocks, Reliability, Quantum wells, Etching, Laser stabilization, Indium gallium phosphide, Lab on a chip

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Proceedings Article | 8 February 2015 Paper

Review of Al-free active region laser diodes on GaAs for pumping applications

M. Krakowski, M. Lecomte, N. Michel, M. Calligaro, M. Carbonnelle, M. Tran, M. Lamponi, C. Cayron, V. Ligeret, J. Bébé Manga Lobé, Roberto Mostallino, N. von Bandel, A. Larrue, Y. Robert, E. Vinet, O. Drisse, M. Garcia, O. Parillaud

Proceedings Volume 9370, 93702C (2015) https://doi.org/10.1117/12.2084696

KEYWORDS: Semiconductor lasers, Cladding, Gallium arsenide, Cesium, Rubidium, Laser development, Laser stabilization, Fiber Bragg gratings, Quantum wells, High power lasers

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Showing 5 of 6 publications

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