Title :
Improving the dynamic range of a coherent AM analog optical link using a cascaded linearized modulator
Author :
Sabido, Delfin Jay M ; Tabara, Masafumi ; Fong, Thomas K. ; Lu, Chung-Li ; Kazovsky, Leonid G.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA, USA
fDate :
7/1/1995 12:00:00 AM
Abstract :
An AM coherent analog optical link is experimentally demonstrated to achieve the highest spurious-free dynamic range reported to date for a coherent system by employing a linearized cascaded electro-optic modulator. The link gives a spurious-free dynamic range of 115 dB/spl middot/Hz/sup 2/3/, with a 34-dB reduction in third-order intermodulation distortion over conventional Mach-Zehnder modulators. With the linearized modulator, our experimental results are just 3 to 6 dB away from the fundamental limit of this link; the remaining penalty is mainly due to RF components.<>
Keywords :
amplitude modulation; electro-optical modulation; intermodulation distortion; light coherence; optical fibre communication; RF components; cascaded linearized modulator; coherent AM analog optical link; coherent system; dynamic range; fundamental limit; highest spurious-free dynamic range; linearized cascaded electro-optic modulator; linearized modulator; penalty; third-order intermodulation distortion; Amplitude modulation; Dynamic range; Electrooptic modulators; Intermodulation distortion; Optical fiber communication; Optical modulation; Optical noise; Optical receivers; Optical transmitters; Radio frequency;
Journal_Title :
Photonics Technology Letters, IEEE
