Title :
A cold-start 1.7 Gb/s FSK heterodyne detection system using single-electrode DFB lasers with no equalization
Author :
Chung, Y.C. ; Tzeng, L.D. ; Leung, S.Y. ; Tkach, R.W. ; Chraplyvy, A.R. ; Derosier, R.M.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
A cold-start, 1.7-Gb/s frequency-shift keying (FSK) heterodyne single-filter detection system using ordinary single-electrode distributed feedback (DFB) lasers is discussed. These lasers were frequency-locked to an atomic krypton line at 1.5224 mu m independently. Thus, this system can maintain a constant IF without an IF locking circuit and consequently does not require any IF acquisition circuitry for cold-start operation. The measured receiver sensitivity of this system was -41 db (1 mW) at an error rate of 10/sup -9/.<>
Keywords :
distributed feedback lasers; frequency shift keying; laser frequency stability; optical communication equipment; semiconductor junction lasers; signal detection; 1.5224 micron; 1.7 Gbit/s; atomic krypton line; cold start FSK heterodyne detection system; frequency-shift keying; heterodyne single-filter detection system; receiver sensitivity; single-electrode DFB lasers; single-electrode distributed feedback; Circuits; Frequency modulation; Frequency shift keying; Laser noise; Local oscillators; Masers; Optical buffering; Optical receivers; Optical transmitters; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
