Abstract
The phase and amplitude precoding technique is essential in optical carrier suppression-based photonic constant-and multi-amplitude quadrature-amplitude-modulation vector signal generation at radio frequency bands. In this letter, a novel precoding scheme with constellations balanced distribution is proposed and investigated. We experimentally demonstrate 8-GBd quadrature-phase-shift-keying (QPSK) vector signal generation at 16 GHz enabled by a single Mach-Zehnder modulator-based oscilloscope modulation and the proposed precoding scheme. Compared with imbalanced precoding, this scheme can provide 2-dB receiver sensitivity improvement, and the obtained constellations at the receiver end is much more symmetrical, which represents the in-phase (I) and quadrature (Q) components have equal performance. The bit-error-ratio for 8-GBd QPSK vector signals can be under hard-decision forward-error-correction threshold of 3.8 × 10-3 after a 25-km standard single-mode fiber transmission.
| Original language | English |
|---|---|
| Article number | 7210194 |
| Pages (from-to) | 2469-2472 |
| Number of pages | 4 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 27 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 1 Dec 2015 |
| Externally published | Yes |
Keywords
- Photonic vector signal generation
- amplitude precoding
- multiamplitude quadrature amplitude modulation (QAM)
- optical carrier suppression (OCS)
- phase precoding