Title :
Demonstration of endless phase modulation for arbitrary waveform generation
Author :
Ozharar, Sarper ; Quinlan, Franklyn ; Gee, Sangyoun ; Delfyett, Peter J.
Author_Institution :
Center for Res. & Educ. in Opt. & Lasers, Univ. of Central Florida, Orlando, FL, USA
Abstract :
We have developed a novel modulation scheme for shifting the frequency of an optical beat signal by improving a conventional serrodyne system via time division multiplexing. This novel method acts as an endless phase modulator where the phase linearly increases from zero phase to infinite phase. With this method, we have shifted a 25-GHz carrier continuously up to 1-MHz offset with 43-dB spur-free dynamic range, which is 7 dB higher than an ordinary serrodyne method.
Keywords :
optical modulation; phase modulation; time division multiplexing; waveform generators; 25 GHz; arbitrary waveform generation; frequency shifting; optical beat signal; phase modulation; serrodyne system; time division multiplexing; Chirp modulation; Dynamic range; Laser mode locking; Nonlinear optics; Optical attenuators; Optical control; Optical filters; Optical modulation; Phase modulation; Radio frequency; Arbitrary waveform generation; endless phase modulation; frequency shifting; serrodyne;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.859398
