Hartung-Gorre Verlag
Inh.: Dr. Renate Gorre D-78465 Konstanz / Germany Fon: +49 (0)7533 97227 Fax: +49
(0)7533 97228 www.hartung-gorre.de |
S
|
Series in Quantum Electronics
edited by
Henry Baltes, Peter Günter, Ursula Keller,
Fritz K. Kneubühl †, Walter Lukosz,
Hans Melchior, Markus W. Sigrist
|
|
Vol. 61 Wolfgang P. Pallmann, Passively Modelocked
Electrically Pumped VECSELs. 1st edition 2013. XXVI, 148 pages, € 64,00. ISBN 978-3-86628-484-5 |
Optically pumped vertical external-cavity
surface-emitting lasers (OP-VECSELs) have shown impressive performance with
high average output power in both continuous-wave (cw)
and passively modelocked operation using
semiconductor saturable absorber mirrors (SESAMs).
Electrical pumping (EP) is a key factor for more compact and cost efficient modelocked VECSELs suitable for low-cost mass applications
such as optical clock-rate distribution in microprocessors, chip-to-chip
interconnects or optical telecommunication systems.
This thesis describes the design, fabrication and
performance improvement of an EP-VECSEL optimized for passive modelocking. An initial realization of an EP-VECSEL is
presented, which demonstrated confined Gaussian-like current injection profiles
and up to 120 mW of output power in cw multi-mode operation. A detailed investigation of the
beam quality of EP-VECSELs is discussed and reveals important guidelines for
achieving excellent beam quality with reasonable output power levels.
Furthermore, an in-depth characterization of important gain properties is given
and broadens the physical understanding of these devices. Moreover, an
optimized EP-VECSEL is presented, which enabled up to 170 mW
of output power in cw multi-mode operation and 26 mW in fundamental transversal mode operation. This was made
possible by improving various design aspects of the devices. Passively modelocking the optimized EP-VECSELs with a SESAM led to
7.3-ps pulses with 13.1 mW of average output power at
1.46 GHz repetition rate. Furthermore, a record-low pulse duration of 6.3 ps was obtained, the shortest pulses from a passively modelocked EP-VECSEL so far.
About the author:
Wolfgang P. Pallmann received his diploma in
electrical engineering in 2009 from the Friedrich-Alexander-University in
Erlangen, Germany. He joined the Ultrafast Laser Physics group in the Institute
of Quantum Electronics at ETH Zurich in the same year. His current research
interests focus on the development and optimization of ultrafast semiconductor
lasers, especially electrically pumped vertical external-cavity
surface-emitting lasers.
Keywords: ultrafast semiconductor lasers,
passively modelocked VECSELs, electrically pumped
VECSELs
Direkt bestellen
bei / to order directly from:
Hartung-Gorre Verlag / D-78465
Konstanz / Germany
Telefon: +49
(0) 7533 97227 Telefax: +49 (0) 7533
97228
http://www.hartung-gorre.de eMail: verlag@hartung-gorre.de