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Building upon multi-rate optical transceivers developed for both near-Earth and deep-space communications, we present scalable next-generation designs for future systems requiring more compact implementation and both power- and photon-efficient performance.
We experimentally investigate integrated photonic microring resonator filters as frequency windows in CHERPe transmitters. The impact of filter-order on optical loss, power handling, modulation extinction ratio enhancement, and waveform distortion is assessed.
We demonstrate power-efficient noise-insensitive optical waveform generation from directly modulated lasers combined with periodic time-frequency windowing. Real-time experiments with direct FPGA-driven lasers achieve near-theoretical communication performance at Gbit/s rates using flexible and scalable transceiver designs.
Combining optical-phase-locked loop based coherent detection, interleaving, and powerful rate-½ FEC enabled the error-free transmission of BPSK waveforms at information rates of 9.94-Gb/s and 19.88-Gb/s with sensitivities of 2.1 photons-per-bit and 3.9 photons-per-bit, respectively.
We demonstrate an average-power-based technique for aligning data and clock signals in consolidated tri-state multi-rate burst-mode DPSK transmitters with a simple and low-SWaP implementation.
Optical communications provides an attractive means of achieving wideband data transfer over long distances. We review perceived challenges and enabling technology developments that promise to facilitate a new era of free-space laser communications.
We demonstrate phase modulation, pulse carving, and burst-mode windowing in a single Mach-Zehnder modulator, significantly reducing size, weight, power, and complexity of prior three-modulator designs with only 0.6-dB additional performance penalty.
We demonstrate new power-efficient techniques for generating high-fidelity waveforms from directly modulated lasers using periodic high-contrast spectral and temporal windowing. Real-time optical M-FSK communication experiments demonstrate flexible and scalable transceiver designs with record sensitivity.
Sensitive multi-rate optical communication is experimentally investigated on static and fading channels at data rates from 52 Mbps to 311 Mbps using 16-ary pulse-position-modulation, channel coding and interleaving, and a near-optimal thresholded preamplified receiver.
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