We propose optical injection locking (OIL) injecting for the first-time a hybrid InP-Si3N4 laser source using another laser integrated on the same chip for microwave generation through optical heterodyning in Ka-, Q- and V-bands. A study of the drift exhibited by the devices will be performed as key parameter of lasers. The amount of free-running drift exhibited by the lasers and a way to minimize as much as possible. According to the measured drift that goes in the worst case up to 520 MHz. However, the electric drift of the beat-note RF signal keeps below 50 MHz thanks of being thermally stabilize over the same conditions. To eliminated the drift, an optical injection locking of one InP/Si3N4 hybrid integrated laser have been done by injecting another hybrid laser integrated on the same chip for the first time. We have demonstrated a locking range demonstrated a locking range of 1.86 GHz.
We propose a microwave photonic band-pass filter in the TriPleX® waveguide technology, capable of performing channel selection in flexible DEMUX satellite systems. The proposed channel selector consists of 2 stages of filtering, that enable fully reconfigurable central frequency and channel bandwidth tuning in the Ka-, Q- and V-band. The first stage of filtering is based on a Coupled Ring Optical Waveguide (CROW) filter and serves as channel bandwidth regulator. The CROW filter includes 8 ring resonators, each with a length of 7.38 cm, corresponding to a Free Spectral Range (FSR) of 2.6667 GHz. Bandwidth reconfigurability is achieved by using ultra low-loss, stress-optic lead zirconate titanate (PZT)-based tunable couplers between the ring resonators, while central frequency tunability is enabled for the whole Ka-band by incorporating a tunable PZT-based phase shift on each ring resonator. The second stage of filtering consists of Asymmetric Mach-Zehnder Interferometer (AMZI) - lattice filters and serves as FSR extender. AMZI lattice filters with FSR of 5.3334 GHz and 10.6668 GHz, respectively, are used to expand the central frequency tunability of the channel selector in the Q- and V-band. The lattice filters are also equipped with tunable phase shifters to allow for tunability in the central frequency. The proposed 2-stage channel selector filter has a fFSR=10.6668 GHz and exhibits a tunable passband bandwidth from 125 MHz to 1000 MHz. The passband insertion loss and group delay variation are < 0.9 dB and 2.8 ns, while channel isolation is higher than 50 dB. Additional presentation content can be accessed on the supplemental content page.
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