Ultra-wideband frequency chirp signal generation by using high-speed optical frequency control with optical single-sideband modulation technique

2006 ◽  
Author(s):  
Tetsuya Kawanishi ◽  
Takahide Sakamoto ◽  
Masayuki Izutsu
Keyword(s):  
High Speed ◽  
Frequency Control ◽  
Ultra Wideband ◽  
Signal Generation ◽  
Optical Frequency ◽  
Chirp Signal ◽  
Frequency Chirp ◽  
Single Sideband ◽  
Single Sideband Modulation ◽  
Optical Single Sideband

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.

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