Abstract

Compact high-power multi-GHz optical sources are of high interest for many applications, such as optical clocking, photonic switching or optical sampling. VECSELs (vertical external cavity surface emitting lasers) modelocked with semiconductor saturable absorber mirrors (SESAMs) [1] achieve excellent beam quality, and high power operation at high repetition rates (486-fs pulses with 30 mW average power at 10 GHz [2], 1.4 W in 6.1-ps pulses at 10 GHz [3], and 50 GHz with 102 mW [4]). However, the laser contains two separate semiconductor elements in a folded cavity, which is an issue for both cost-efficient high volume fabrication and for higher repetition rates. Modelocked integrated external-cavity surface emitting lasers (MIXSELs) [5, 6] combine gain and absorber within one semiconductor wafer. This enables modelocking in a simple straight cavity which can be extended towards a quasi-monolithic design [6]. Since the first MIXSEL demonstration in 2007 (40 mW in 35-ps pulses at 2.8 GHz) [5], we improved our MIXSEL design by introducing novel low saturation fluence quantum dot (QD) saturable absorbers. This allows for an antiresonant MIXSEL design with high growth tolerance. Additionally, thermal management was substantially improved by direct soldering the MIXSEL semiconductor chip onto a CVD diamond heat spreader and subsequent substrate removal. At 2.5 GHz repetition rate, we recently demonstrated power scaling up to 6.4 W [7].

© 2011 Optical Society of America

PDF Article
More Like This
10-GHz MIXSEL: An Integrated Ultrafast Semiconductor Disk Laser with 2.2 W Average Power

V. J. Wittwer, B. Rudin, D. J. H. C. Maas, M. Hoffmann, O. D. Sieber, Y. Barbarin, M. Golling, T. Südmeyer, and U. Keller
CThG5 CLEO: Science and Innovations (CLEO_SI) 2011

Ultrafast semiconductor lasers in the thin disk geometry

B. Rudin, M. Hoffmann, V. J. Wittwer, W. P. Pallmann, M. Golling, Y. Barbarin, T. Südmeyer, and U. Keller
TuF2 Latin America Optics and Photonics Conference (LAOP) 2010

Modelocked Integrated External-Cavity Surface Emitting Laser (MIXSEL) with output power up to 660 mW and repetition rate up to 10 GHz

B. Rudin, V. J. Wittwer, D. J. H. C. Maas, Y. Barbarin, M. Golling, T. Südmeyer, and U. Keller
CMY6 Conference on Lasers and Electro-Optics (CLEO) 2010

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription