A coherent optical en/decoder based on photonic crystal (PhC) for optical code-division-multiple (OCDM)-based optical
label (OCDM-OL) optical packets switching (OPS) networks is proposed in this paper. In this scheme, the optical pulse
phase and time delay can be flexibly controlled by the photonic crystal phase shifter and delayer using the appropriate
design of fabrication. In this design, the combination calculation of the impurity and normal period layers is applied,
according to the PhC transmission matrix theorem. The design and theoretical analysis of the PhC-based optical coherent
en/decoder is mainly focused. In addition, the performances of the PhC-based optical en/decoders are analyzed in detail.
The reflection, the transmission, delay characteristic and the optical spectrum of pulse en/decoded are studied for the
waves tuned in the photonic band-gap by the numerical calculation, taking into account 1-Dimension (1D) PhC.
Theoretical analysis and numerical results show that optical pulse is achieved to properly phase modulation and time
delay by the proposed scheme, optical label based on OCDM is rewrote successfully by new code for OCDM-based OPS
(OCDM-OPS), and an over 8.5 dB ration of auto- and cross-correlation is gained, which demonstrates the applicability of
true pulse phase modulation in a number of applications.