Title :
Millimeter wave, multigigahertz optical modulation by feedforward phase noise compensation of a beat note generated by photomixing of two laser diodes
Author :
Solgaard, Olav ; Park, John ; Georges, John B. ; Pepeljugoski, Petar K. ; Lau, Kam Y.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
5/1/1993 12:00:00 AM
Abstract :
A technique is described for high frequency (up to 100 GHz), narrowband ( approximately GHz) optical modulation by encoding the millimeter-wave signal onto a beat note produced by photomixing of radiation from two 1.3 mu m DFB lasers. The phase noise on the beat note is compensated by a feedforward technique, using a low-frequency external optical modulator which simultaneously encodes the information to be transmitted. The modulation band can be tuned by varying the lasing frequency of one or both of the lasers. The fundamental performance limit of this technique is investigated, and the transmission of a pulsed RF signal at 40 GHz is demonstrated.<>
Keywords :
compensation; encoding; laser beams; laser tuning; noise; optical communication equipment; optical modulation; semiconductor lasers; 1.3 micron; 100 GHz; 40 GHz; DFB lasers; IR; LF; MM wave; beat note; encoding; feedforward phase noise compensation; fundamental performance limit; high frequency; laser beam mixing; laser diodes; lasing frequency; low-frequency external optical modulator; millimeter-wave signal; modulation band; multigigahertz optical modulation; narrowband; optical communications; photomixing; pulsed RF signal; tuned; Encoding; Frequency; Laser noise; Laser tuning; Millimeter wave technology; Narrowband; Optical modulation; Optical noise; Phase modulation; Phase noise;
Journal_Title :
Photonics Technology Letters, IEEE
