Long-wavelength MEMS tunable vertical-cavity surface-emitting lasers with high sidemode suppression

Autor:	Benjamin Kögel, F. Riemenschneider, G. Böhm, Markus-Christian Amann, M. Maute, Peter Meissner, H. Halbritter
Rok vydání:	2006
Předmět:	Materials science business.industry Aperture Physics::Optics Near and far field Laser Atomic and Molecular Physics and Optics Vertical-cavity surface-emitting laser Semiconductor laser theory law.invention Transverse mode Wavelength Optics law Optoelectronics business Gaussian beam
Zdroj:	Journal of Optics A: Pure and Applied Optics. 8:S370-S376
ISSN:	1741-3567 1464-4258
DOI:	10.1088/1464-4258/8/7/s13
Popis:	We present a micromechanically tunable long-wavelength vertical-cavity surface-emitting laser with a buried tunnel junction aperture and a stable half-symmetric cavity for full mode control. The conjunction of the active part 'half-VCSEL' and the curved MEMS-mirror in a two-chip assembly enables high output power singlemode emission exceeding 1?mW. Electrothermal actuation of the micromechanical chip allows us to extend the single wavelength performance to a continuously tunable, selectively wavelength-addressable spectrum of 28?nm. The concave curvature and the resulting long air-gap cavity are designed to favour the resonance of the fundamental mode, i.e. to match the phase front predicted by Gaussian beam theory corresponding to the aperture diameter of 10??m. The spatial beam profile of the MEMS-VCSEL is measured in the far-field and compared with a conventional VCSEL with a fixed plane top mirror. The polarization is controlled by a dominating mirror asymmetry. High sidemode suppression over the whole tuning range with respect to both the transverse modes (>40?dB) and the polarization modes (>30?dB) is demonstrated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8828ffd345fe5c66bf3ea2b747aec66b https://doi.org/10.1088/1464-4258/8/7/s13 Zobrazit plný text záznamu