Wavelength-stabilized near-field laser

Vitaly A. Shchukin , V.M. Kalosha , Nikolay Ledentsov Jr. , Łukasz Chorchos , Nikolay N. Ledentsov


Surface-trapped electromagnetic waves can be localized at a boundary between a semiconductor distributed Bragg reflector (DBR) and a homogeneous dielectric medium or air. These waves enable a novel class of both in-plane-emitting and vertically-emitting optical devices including edge-emitting lasers, disk microlasers, near-field fiber-coupled lasers as well as vertical cavity surface emitting lasers (VCSELs). We show that the surface-trapped modes can be controlled by tuning the thickness of a single DBR layer. Diagrams in variables "wavelength - thickness of the control layer" are constructed for both TM and TE optical modes revealing the parameter domains, in which surface-trapped modes exist. The domains contain cusps, in the vicinity of which surface-trapped modes are allowed only in a narrow spectral region, enabling wavelength-stabilized operation of a laser. For an edge-emitting structure designed for lasing at ∼1 μm, the lasing wavelength shifts upon temperature at a rate ∼0.07 nm/K. The fraction of the optical power of the surface-trapped mode accumulated in the air can reach ∼60%. In oxide-confined VCSEL structures the surface-trapped mode can be used for engineering of the interaction with the VCSEL lasing modes. Deposition of an effective (3λ/4)-thick additional layer on top of the top DBR of the VCSEL allows surface-trapped modes to reach the wavelength of the VCSEL lasing modes. Interaction of these two types of generally non-orthogonal optical modes results in the lateral leakage of the VCSEL emission. Mapping of the VCSEL wafers in areas with the variable aperture diameters D shows non-monotonous behavior of side mode suppression ratio (SMRS) versus D oscillating in the range from 7 dB to ∼30 dB with three clearly revealed maxima in the SMSR at particular aperture diameters varied in the range from ∼3 μm to ∼5 μm. Similar oscillatory behavior was previously predicted for a different type of leaky VCSELs. VCSELs with SMSR above 20 dB are tested for data transmission over a multimode fiber (MMF). 40Gb/s open eye data transmission over 1.4 km OM5 MMF without pre-emphasis or equalization is demonstrated is such device.
Author Vitaly A. Shchukin - Vertically Integrated Systems GmbH (VIS GmbH)
Vitaly A. Shchukin,,
, V.M. Kalosha - VI Systems GmbH (VIS)
V.M. Kalosha,,
, Nikolay Ledentsov Jr. - VI Systems GmbH (VIS)
Nikolay Ledentsov Jr.,,
, Łukasz Chorchos (FEIT / IT)
Łukasz Chorchos,,
- The Institute of Telecommunications
, Nikolay N. Ledentsov - Vertically Integrated Systems GmbH (VIS GmbH)
Nikolay N. Ledentsov,,
Publication size in sheets0.75
Article number113011I
Book Belyanin Alexey A., Smowton Peter M. (eds.): Proceedings of the Novel In-Plane Semiconductor Lasers XIX - SPIE OPTO 2020, Proceedings of SPIE: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments, vol. 11301, 2020, SPIE - The International Society for Optics and Photonics, ISBN 9781510633650, [9781510633667], 160 p., DOI:10.1117/12.2569981
Keywords in Englishsurface–trapped optical mode, near field laser, wavelength–stabilized laser, oxide–confined vertical cavity surface–emitting laser (VCSEL), leaky VCSEL, single mode VCSEL
URL https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11301/113011I/Wavelength-stabilized-near-field-laser/10.1117/12.2545235.full
Languageen angielski
2020 Chorchos Wavelength-stabilized near-field laser.pdf 1.81 MB
Score (nominal)20
Score sourcepublisherList
ScoreMinisterial score = 20.0, 21-07-2020, ChapterFromConference
Publication indicators Scopus Citations = 0
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