Abstract
We theoretically evaluate the performance of tunable channel-selective wavelength shift based on cascaded sum-
and difference-frequency generation by the use of two pump lights in periodically poled lithium niobate waveguides.
In double-pass configurations, the functions of wavelength add/drop and wavelength shift are easy to integrate in
the same waveguide. Analysis shows that a longer waveguide more competently adapts narrower channel spacing in
wavelength-division-multiplexed (WDM) systems. This wavelength shifter is flexible due to the almost separable
operations of the two pumps: The channel is selected by setting the first pump, and the wavelength-shifting value is
tuned by adjusting the second pump. This wavelength shifter has a very large dynamic region. For a 2.56-cm-long
waveguide, the maximum dynamic region is as broad as 67 nm in a 0.4-nm channel-spacing WDM system. The dynamic
region is mainly dominated by the limitation of multiple-channel crosstalk in a dense WDM system. However, it is
dominated by the limitation of single-channel efficiency fluctuation in a coarse one.
© 2007 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