Abstract
This paper reports on all optical frequency down conversion clock recovery
based on Quantum-Dash Fabry–Perot mode-locked laser diode
(QD-MLLD). A first section is dedicated to the generation of a tunable
repetition rate pulse source based on a first QD-MLLD. The principle is to
select three lines in the QD-MLLD spectrum with a filtering technique; the
lines spacing are properly chosen to generate the desired repetition rate.
In this paper, a frequency of 427 GHz was reached and observed with an
optical sampling oscilloscope. Moreover, an encoded 170.8 GHz pulse source
was characterized showing no penalty in comparison with our reference
obtained by Optical Time Division Multiplexing (OTDM), which confirms the
quality of the optical clock. In a second section, we show a clock frequency
down conversion based on a second QD-MLLD, which is optically injected by a
pulse source, whose repetition rate is 10 times higher than its self
pulsating frequency. The 42.7 GHz down converted clock is then encoded and
analyzed showing no penalty in comparison to a standard 42.7 Gbit/s
reference, demonstrating its quality. Finally, in a third section, we
demonstrate sub-harmonic clock recovery with a QD-MLLD, when a data stream
is injected. We measure a penalty of 0.3 dB when compared to a standard 42.7
Gbit/s reference.
© 2011 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by 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