Abstract
We propose a novel scheme for optical frequency-locked multi-carrier generation based on a directly
modulated laser (DML) and a phase modulator (PM) in cascade through synchronous sinusoidal radio frequency
(RF) signal. The optimal operating zone for the cascaded DML and PM scheme is determined via theoretical
analysis and numerical simulation. We demonstrate 16 optical subcarriers can be successfully generated based
on the cascaded DML and PM scheme in the optimal zone. The generated 16 optical subcarries have frequency
spacing of 12.5 GHz and power difference of less than 3 dB. These results agree well with those of the
numerical simulation. We also demonstrate intensity modulation and direct detection (IM-DD) based on one of
the 16 generated optical subcarriers. After 20-km single-mode fiber-28 (SMF-28) transmission, the bit-error
ratio (BER) of 1 \times 10-9 can be attained for both 3.125- and 12.5-Gb/s bit rates.
© 2013 Chinese Optics Letters
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