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Topology optimization has a great potential for finding out more compact and higher performance optical waveguide devices. In past researches on topology optimization, the finite element method (FEM) or the finite difference time domain (FDTD) method has mainly been employed as a numerical analysis method [1, 2]. In the case that the longitudinal refractive index distribution varies gradually and...
A traveling-wave-electrode InP n-p-i-n Mach-Zehnder modulator monolithically integrated with a semiconductor optical amplifier was developed. Loss-less operation and full C-band 40-Gbit/s DPSK modulation with a low driving voltage of 3 Vpp was successfully demonstrated.
Compact 40 Gbit/s InP Mach-Zehnder (MZ) modulator with low Vpi is demonstrated by introducing new waveguide structure. An InP DQPSK modulator is also realized by monolithically integrating the MZ modulators into a compact MZ interferometer, and 80 Gbit/s operation is confirmed.
This paper presents a one-input M-output (1 x M)configuration and a synthesis algorithm for realizing an optical finite impulse response (FIR) lattice filter having M output channels (M ges 2). The circuit configuration has a multilayer structure consisting of multiple Mach-Zehnder interferometers with delay time differences of zero or Deltatau. It is a natural extension of the conventional two-port...
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