@inproceedings{ae35be3329704c7480ed0ba06297a224,
title = "Far-field emission characteristics and linewidth measurements of surface micro-machined MEMS tunable VCSELs",
abstract = "In this paper, we demonstrate for the first time the far-field experimental results and the linewidth characteris- tics for widely tunable surface-micromachined micro-electro-mechanical system (MEMS) vertical-cavity surface- emitting lasers (VCSELs) operating at 1550 nm. The fundamental Gaussian mode emission is confirmed by optimizing the radius of curvature of top distributed Bragg reflector (DBR) membrane and by choosing an ap- propriate diameter of circular buried tunnel junctions (BTJs) so that only the fundamental Gaussian mode can sustain. For these VCSELs, a mode-hop free continuous tuning over 100 nm has already been demonstrated, which is achieved by electro-thermal tuning of the MEMS mirror. The fiber-coupled optical power of 2mW over the entire tuning range has been reported. The singlemode laser emission has more than 40 dB of side-mode suppression ratio (SMSR). The smallest linewidth achieved with these of MEMS tunable VCSELs is 98MHz which is one order of magnitude higher than that of fixed-wavelength VCSELs.",
keywords = "Electro-thermal tuning, Far-field, Linewidth, MEMS, Surface micro-machining, Tunable VCSEL",
author = "Sujoy Paul and Christian Gierl and Tobias Grundl and Karolina Zogal and Peter Meissner and Amann, {Markus Christian} and Franko K{\"u}ppers",
year = "2013",
doi = "10.1117/12.2004383",
language = "English",
isbn = "9780819494085",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Vertical-Cavity Surface-Emitting Lasers XVII",
note = "Vertical-Cavity Surface-Emitting Lasers XVII ; Conference date: 06-02-2013 Through 07-02-2013",
}