Abstract
In order to improve transmission efficiency of optical-fiber communication system
for hybrid 10 G/40 G system presently, and hybrid 40 G/100 G system in the future, a
planar lightwave circuit-based optical interleaver with arbitrary passband width ratio
is proposed and investigated, which is based on hybrid structure of microring and
Mach–Zehnder interferometer and offers the advantages of compactness, ruggedness, and
better compatibility with other integrated optical circuits. Most importantly, the
interleaver we proposed can realize the 3-dB passband width ratio between two output
ports from equal to any unequal proportion just by adjusting coupling coefficients of
couplers involved. The simulation results of symmetrical and asymmetrical output spectra
are presented and all of them are with a channel isolation more than 45 dB and a
flat-top passband. Furthermore, the effects of some key parameters on the
characteristics of output spectra are also analyzed.
© 2013 IEEE
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