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Generation of tunable millimeter-wave (MMW) and Terahertz (THz) signals from 117 GHz to 954 GHz is experimentally demonstrated with a 1310 nm Quantum Dot Distributed Feedback laser subject to single beam optical injection.
The performance improvement of direct-detection double-sideband OFDM systems achieved by using symbol precoding to reduce the signal PAPR is assessed experimentally. EVM improvement of about 2 dB, and SSMF reach increase of 15% are shown.
We demonstrate a high-power and high-linearity photodiode module based on a 1×4 MMI-Splitter and a 4×PD-Array. The module achieved 10 dBm output power at 10 GHz and an OIP3 of >20 dBm at 20 GHz.
We propose a multiband 60-GHz radio-over-fiber (RoF) system to offer converged legacy and multi-gigabit wireless services. Real-time WiFi and 1-Gb/s OOK data over fiber and 60-GHz wireless propagation has been demonstrated for the first time.
We demonstrated a broadband millimeter-wave signal delivery system over an optical fiber using a high-speed optical modulator. The high spurious-free dynamic range of the system is capable of high-capacity radio signal transport.
Molybdenum disulfide nano-sheets were all-optically deposited on a single mode fiber facet, and its process was monitored by a reflectometry method. Nonlinear response and power dependent transmission of prepared sample was observed by a 1552nm fiber laser.
A high-linearity balanced photodetector with a record-high RF output power of 16 dBm at 40 GHz is presented. The third order intercept point at 15 GHz reaches 34 dBm. By operating one photodiode in the non-linear regime we observe partial cancelation of intermodulation distortions in common mode.
We demonstrate phase conjugate wave generation using divergent spherical wave, for the first time, in semiconductor gain medium. We find that the phase conjugate reflectivity increases with an increase in optical feedback power.
Optical saturable absorption through monolayer graphene vertically inserted between fibers and overlaid on an ion-exchanged waveguide was measured for picosecond switching application. Modulation depth of absorption larger than 10dB was obtained in the latter structure.
A simple spurious-free microwave photonic filters (MPF) employing the optical frequency comb (OFC) with quadratic phase, which can be freely tuned without the rigid constraint of the Nyquist zone, is proposed and demonstrated.
In this paper we demonstrate different techniques for 1 Tb/s QPSK-WDM-OFDM-PON optical power budget extension. Our simulation results show that EDFA outperforms SOA and yields more access budget. We present our simulation results for 64 customers with 0.625/40 Gb/s/λ guaranteed/peak bit rate downstream scenario.
A time-of-flight range finding sensor using a monolithic integrated pnp phototransistor is presented. The phototransistor was specially adapted for the requirements of the time-of-flight application. The sensor has a fill factor of 75 % and achieves standard deviations down to 7.3 mm at 6250 fps and an incident optical power of −40 dBm.
The feasibility to achieve large-scale spectral compression of an all-normal dispersion fiber laser in a dispersion-increasing fiber is studied both numerically and experimentally. Experimentally, a record-high spectral compression ratio of 46.7 is achieved.
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