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Proceedings Paper

Characterization of an ultrafast uni-traveling-carrier absorber for monolithically integrated InGaAsP/InP mode-locked laser diodes
Author(s): Riccardo Scollo; Hans-Jörg Lohe; Franck Robin; Daniel Erni; Emilio Gini; Werner Vogt; Heinz Jäckel
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Paper Abstract

The monolithic integration of photonic circuits will open new perspectives for optical communication networks. It will enable higher transmission rates, new functionalities, higher functional densities, leading to all-optical networks and reduced cost for telecommunication. Mode-locked laser diodes (MLLDs) will play an important role for short pulse generation in Tb/s networks for the transmitters, as well as for clock recovery for the receivers and optical regenerators. To overcome the limitations of conventional monolithically integrated MLLDs, where the pulse width is limited by the relatively slow absorption recovery, we demonstrate an ultrafast semiconductor saturable absorber based on the uni-traveling-carrier (UTC) concept. The UTC absorber is designed to be monolithically integrated in InGaAsP/InP mode-locked laser diodes grown by MOVPE. The absorber shows a saturation energy of Esat,abs of 1pJ at 1.55μm and a voltage-dependent recovery time of 2ps at 2V reverse bias. The importance of an optimum absorption-bandgap to absorber-length ratio is demonstrated to keep the saturation energy low. The voltage-dependent absorption and absorption recovery time make this absorber ideal for hybrid mode-locking and synchronization to an external RF-source.

Paper Details

Date Published: 14 April 2006
PDF: 15 pages
Proc. SPIE 6184, Semiconductor Lasers and Laser Dynamics II, 61841G (14 April 2006); doi: 10.1117/12.662402
Show Author Affiliations
Riccardo Scollo, ETH Zurich (Switzerland)
Hans-Jörg Lohe, ETH Zurich (Switzerland)
Franck Robin, ETH Zurich (Switzerland)
Daniel Erni, ETH Zurich (Switzerland)
Emilio Gini, ETH Zurich (Switzerland)
Werner Vogt, ETH Zurich (Switzerland)
Heinz Jäckel, ETH Zurich (Switzerland)

Published in SPIE Proceedings Vol. 6184:
Semiconductor Lasers and Laser Dynamics II
Daan Lenstra; Markus Pessa; Ian H. White, Editor(s)

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