Optical single-sideband modulation based on a silicon dual-parallel Mach-Zehnder modulator

2020 ◽  
Author(s):  
Panpan Shi ◽  
Liangjun Lu ◽  
Gangqiang Zhou ◽  
Shuhuang Chen ◽  
Jianping Chen ◽  
...  
Keyword(s):  
Single Sideband ◽  
Single Sideband Modulation ◽  
Optical Single Sideband ◽  
Mach Zehnder Modulator

scholarly journals Pilot-assisted intradyne reception for high-speed continuous-variable quantum key distribution with true local oscillator

Quantum ◽  
2019 ◽  
Vol 3 ◽  
pp. 193 ◽  
Author(s):  
Fabian Laudenbach ◽  
Bernhard Schrenk ◽  
Christoph Pacher ◽  
Michael Hentschel ◽  
Chi-Hang Fred Fung ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
High Speed ◽  
Local Oscillator ◽  
Continuous Variable ◽  
Excess Noise ◽  
Phase Matching ◽  
Optical Frequency ◽  
Single Sideband ◽  
Single Sideband Modulation ◽  
Optical Single Sideband

We present a pilot-assisted coherent intradyne reception methodology for CV-QKD with true local oscillator. An optically phase-locked reference tone, prepared using carrier-suppressed optical single-sideband modulation, is multiplexed in polarisation and frequency to the 250 Mbaud quantum signal in order to provide optical frequency- and phase matching between quantum signal and local oscillator. Our concept allows for high symbol rates and can be operated at an extremely low excess-noise level, as validated by experimental measurements.

A photonic transmission link with enhanced dynamic range by incorporating phase shifters in dual drive dual parallel Mach–Zehnder modulator

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sarika Singh ◽  
Sandeep K. Arya ◽  
Shelly Singla ◽  
Pulkit Berwal
Keyword(s):  
Dynamic Range ◽  
Control Method ◽  
Phase Shifters ◽  
Optical Modulator ◽  
Rf Signals ◽  
Single Sideband Modulation ◽  
Spurious Free Dynamic Range ◽  
Optical Single Sideband ◽  
Mach Zehnder Modulator ◽  
Free Dynamic

Abstract A linearization scheme is proposed for microwave photonic link to enlarge spurious free dynamic range using a dual-electrode dual parallel Mach–Zehnder modulator (MZM). This scheme employs phase control method to improve performance of the link by adjusting phase of radio frequency (RF) signals and bias voltages of optical modulator. Optical single sideband modulation is achieved through sub-modulators of dual parallel MZM which increases efficiency of the link. The simulated results show that third order intermodulation distortion is suppressed by 28 dB when the input RF signals are 9.1 and 9.5 GHz and noise floor is at −161 dBm/Hz. The spurious free dynamic range is also improved by 12.6 dB.

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