Abstract
A novel time-domain ultra-fast pulse shaping approach for multi-TBaud serial optical communication signal (e.g. QPSK and 16-QAM) generation based on the first-order Born approximation in feasible all-fiber long-period gratings is proposed and numerically demonstrated.
Highlights
A novel time-domain ultra-fast pulse shaping approach for multi-TBaud serial optical communication signal (e.g. QPSK and 16-QAM) generation based on the first-order Born approximation in feasible all-fiber long-period gratings is proposed and numerically demonstrated
Fiber and integrated-waveguide grating structures have been widely investigated for ultrafast optical pulse shaping and processing applications, including generation and detection of high-speed complex data streams in telecommunication systems [1,2]
We numerically demonstrate the straightforward use of this phenomenon for ultrafast optical coding applications, for generation of customized serial optical communication streams under any desired complex coding format (e.g. QPSK and 16-QAM modulation formats in the examples reported here), well in the TBaud range using readily feasible Long-period fiber gratings (LPGs) designs, e.g. with grating apodization resolutions above the millimeter range
Summary
Fiber and integrated-waveguide grating structures have been widely investigated for ultrafast optical pulse shaping and processing applications, including generation and detection of high-speed complex data streams in telecommunication systems [1,2]. Previous studies in counter-directional coupling structures [6,7], e.g. fiber/waveguide BGs, have revealed that under the first-order Born approximation (i.e. weak-coupling conditions), the output time-domain optical field complex envelope variation follows the spatial variation of the complex coupling coefficient This phenomenon, referred to as space-to-time mapping, provides a very straightforward mechanism to synthesize optical waveforms (e.g. coded communication data streams) with prescribed complex temporal shapes. We numerically demonstrate the straightforward use of this phenomenon for ultrafast optical coding applications, for generation of customized serial optical communication streams under any desired complex coding format (e.g. QPSK and 16-QAM modulation formats in the examples reported here), well in the TBaud range (femtosecond resolutions) using readily feasible LPG designs, e.g. with grating apodization resolutions above the millimeter range
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