Abstract
In this paper, analog and digital optical pulse synthesizers using high-resolution
arrayed-waveguide gratings (AWG) have been developed. The analog type of optical
synthesizer consists of an AWG with an integrated 45$°, curved-surfaced mirror, a 4-<i>f</i> lens
system, and an optically addressable spatial light modulator. The effective
frequency resolution is 14.5 GHz. A dispersion compensation experiment is
successfully carried out and a transform-limited short pulse has been obtained.
This digital type of optical synthesizer comprises 30 frequency separated
channels with a spacing of 12.5 GHz, where each channel includes an amplitude
modulator and a phase modulator. The rectangular-shaped pulse is generated
with this pulse synthesizer, together with a 12.5-GHz-spacing, optical frequency
comb. The synthesizer can generate an optical pulse with any waveform. Moreover,
using periodic characteristics of the pulse synthesizer, a 250-GHz repetition
rate pulse train was generated, in combination with an ultrawideband, waveguide
type of Fabry–Perot electrooptic modulator.
© 2008 IEEE
PDF Article
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