Mr. Mikel Agustín Profile

Mikel Agustín

at VI Systems GmbH

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Author

Publications (10)

Proceedings Article | 1 March 2019 Presentation + Paper

Energy efficient 850-nm VCSEL based optical transmitter and receiver link capable of 56 Gbit/s NRZ operation

N. Ledentsov Jr., M. Agustin, L. Chorchos, J.-R. Kropp, V. Shchukin, V. Kalosha, M. Koepp, C. Caspar, J. Turkiewicz, N. Ledentsov

Proceedings Volume 10938, 109380J (2019) https://doi.org/10.1117/12.2509916

KEYWORDS: Vertical cavity surface emitting lasers, Receivers, Modulation, Transmitters, Optical fabrication, Oscilloscopes, Optical fabrication equipment, Energy efficiency, Connectors

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Proceedings Article | 19 February 2018 Paper

Temperature stable oxide-confined 850-nm VCSELs operating at bit rates up to 25 Gbit/s at 150ºC

N. Ledentsov, M. Agustin, J.-R. Kropp, V. Shchukin, V. Kalosha, K. Chi, Z. Khan, J. W. Shi

Proceedings Volume 10552, 105520P (2018) https://doi.org/10.1117/12.2318015

KEYWORDS: Vertical cavity surface emitting lasers, Eye, Temperature metrology, Oxides, Data transmission, Near field, Data communications, Multimode fibers, Fiber lasers, Waveguides

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Proceedings Article | 19 February 2018 Paper

Thermally stable surface-emitting tilted wave laser

V. Shchukin, N. Ledentsov, V. Kalosha, M. Agustin, J. R. Kropp, M. Maximov, F. Zubov, Yu. M. Shernyakov, A. Payusov, N. Yu Gordeev, M. Kulagina, A. Zhukov

Proceedings Volume 10552, 1055207 (2018) https://doi.org/10.1117/12.2290565

KEYWORDS: Vertical cavity surface emitting lasers, Electroluminescence, Refractive index, Waveguides, Semiconductors, Near field

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Novel lasing modes in a vertical-cavity surface-emitting laser (VCSEL)-type structure based on an antiwaveguding cavity are studied. Such a VCSEL cavity has an effective refractive index in the cavity region lower than the average index of the distributed Bragg reflectors (DBRs). Such device in a stripe geometry does not support in–plane waveguiding mode, and all modes with a high Q-factor are exclusively VCSEL-like modes with similar near field profile in the vertical direction. A GaAlAs–based VCSEL structure studied contains a resonant cavity with multiple GaInAs quantum wells as an active region. The VCSEL structure is processed as an edge-emitting laser with cleaved facets and top contact representing a non–alloyed metal grid. Rectangular-shaped ~400x400 µm pieces are cleaved with perpendicular facets. The contact grid region has a total width of ~70 μm. 7 μm–wide metal stripes serve as non–alloyed metal contact and form periodic rectangular openings having a size of 10x40 μm. Surface emission through the windows on top of the chip is measured at temperatures from 90 to 380 K. Three different types of modes are observed. The longest wavelength mode (mode A) is a VCSEL–like mode at ~854 nm emitting normal to the surface with a full width at half maximum (FWHM) of the far field ~10°. Accordingly the lasing wavelength demonstrates a thermal shift of the wavelength of 0.06 nm/K. Mode B is at shorter wavelengths of ~840 nm at room temperature, emitting light at two symmetric lobes at tilt angles ~40° with respect to the normal to the surface in the directions parallel to the stripe. The emission wavelength of this mode shifts at a rate 0.22 nm/K according to the GaAs bandgap shift. The angle of mode B with respect to the normal reduces as the wavelength approaches the vertical cavity etalon wavelength and this mode finally merges with the VCSEL mode. Mode B hops between different lateral modes of the VCSEL forming a dense spectrum due to significant longitudinal cavity length, and the thermal shift of its wavelength is governed by the shift of the gain spectrum. The most interesting observation is Mode C, which shifts at a rate 0.06 nm/K and has a spectral width of ~1 nm. Mode C matches the wavelength of the critical angle for total internal reflection for light impinging from semiconductor chip on semiconductor/air interface and propagates essentially as an in–plane mode. According to modeling data we conclude that the lasing mode represents a coupled state between the TM–polarized surface–trapped optical mode and the VCSEL cavity mode. The resulting mode has an extended near field zone and low propagation losses. The intensity of the mode drastically enhances once is appears at resonance with Mode B. A clear threshold is revealed in the L–I curves of all modes and there is a strong competition of the lasing mechanisms once the gain maximum is scanned over the related wavelength range by temperature change.

Proceedings Article | 19 February 2018 Paper

50 Gb/s NRZ and 4-PAM data transmission over OM5 fiber in the SWDM wavelength range

M. Agustin, N. Ledentsov, J.-R. Kropp, V. Shchukin, V. Kalosha, K. Chi, Z. Khan, J. W. Shi

Proceedings Volume 10552, 1055202 (2018) https://doi.org/10.1117/12.2289823

KEYWORDS: Vertical cavity surface emitting lasers, Eye, Data transmission, Picosecond phenomena, Modulation, Digital signal processing, Signal attenuation, Forward error correction, Dispersion, Multimode fibers

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Proceedings Article | 25 February 2017 Paper

Continuous wave and modulation performance of 1550nm band wafer-fused VCSELs with MBE-grown InP-based active region and GaAs-based DBRs

A. Babichev, L. Ya. Karachinsky, I. Novikov, A. Gladyshev, S. Mikhailov, V. Iakovlev, A. Sirbu, G. Stepniak, L. Chorchos, J. Turkiewicz, M. Agustin, N. Ledentsov, K. Voropaev, A. Ionov, A. Yu. Egorov

Proceedings Volume 10122, 1012208 (2017) https://doi.org/10.1117/12.2250842

KEYWORDS: Vertical cavity surface emitting lasers, Modulation, Continuous wave operation, Fiber to the x, Quantum wells, Eye, Wafer-level optics, Gallium, Photodetectors, Aluminum

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Proceedings Article | 10 February 2017 Paper

Relative intensity noise of single- and multi-mode 850 nm vertical-cavity surface-emitting lasers

Łukasz Chorchos, Jarosław Turkiewicz, J. Kropp, N. Ledentsov, V. Shchukin, M. Agustin

Proceedings Volume 10325, 103250J (2017) https://doi.org/10.1117/12.2271089

KEYWORDS: Vertical cavity surface emitting lasers

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Proceedings Article | 10 February 2017 Paper

Impact of the sample modal composition of 850nm VCSELs on high speed data transmission over multimode fiber applying different modulation formats

J.-R. Kropp, N. Ledentsov, M. Agustin, V. Shchukin, J. Turkiewicz, I. Eddie

Proceedings Volume 10325, 103250W (2017) https://doi.org/10.1117/12.2271051

KEYWORDS: Vertical cavity surface emitting lasers, Multimode fibers, Modulation, Data transmission, Data communications

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Proceedings Article | 10 February 2017 Paper

High speed 850 nm single mode and multi mode VCSEL transmission over multimode fiber

Łukasz Chorchos, Jarosław Turkiewicz, J. Kropp, N. Ledentsov, V. Shchukin, M. Agustin

Proceedings Volume 10325, 103250T (2017) https://doi.org/10.1117/12.2271043

KEYWORDS: Vertical cavity surface emitting lasers, Multimode fibers, Optical fibers

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Proceedings Article | 4 March 2016 Paper

Close to 100 Gbps discrete multitone transmission over 100m of multimode fiber using a single transverse mode 850nm VCSEL

Bo Wu, Xian Zhou, Yanan Ma, Jun Luo, Kangping Zhong, Shaofeng Qiu, Zhiyong Feng, Yazhi Luo, Mikel Agustin, Nikolay Ledentsov, Joerg Kropp, Vitaly Shchukin, Iain Eddie, Lu Chao

Proceedings Volume 9766, 97660K (2016) https://doi.org/10.1117/12.2208901

KEYWORDS: Vertical cavity surface emitting lasers, Multimode fibers, Data transmission, Optical interconnects, Forward error correction, Modulation, Digital signal processing, Oxides, Electroluminescence, Optical microscopy

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Proceedings Article | 11 September 2015 Paper

High order modulation of 850nm VCSELs

Mikel Agustin, Lukasz Chorchos, Jarosław Turkiewicz

Proceedings Volume 9662, 96620U (2015) https://doi.org/10.1117/12.2205733

KEYWORDS: Vertical cavity surface emitting lasers, Modulation, Eye, Cameras, Imaging systems, Microscopes, Static characterization, Forward error correction, Data corrections, Clocks

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Showing 5 of 10 publications

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