Title :
Highly sensitive frequency discriminator for heterodyne detection
Author :
Welter, R. ; Standley, R.D. ; Gibbons, C.
Author_Institution :
Bellcore, Red Bank, NJ, USA
Abstract :
A novel, sensitive, and inexpensive frequency discriminator is presented for FSK demodulation in heterodyne receivers with large IF line-widths and for frequency discrimination in automatic frequency control (AFC) loops with wide tracking ranges. The detection bandwidth ranges from DC to over 6 GHz. At a modulation rate of 622 Mb/s, bit error rates as low as 10/sup -9/ were achieved with RF input powers ranging from -27.5 dBm to more than 0 dBm.<>
Keywords :
automatic frequency control; demodulation; discriminators; frequency shift keying; optical receivers; 6 GHz; 622 Mbit/s; AFC loops; FSK demodulation; RF input powers; automatic frequency control; bit error rates; detection bandwidth; heterodyne detection; heterodyne receivers; highly sensitive frequency discriminator; large IF line-widths; modulation rate; wide tracking ranges; Electrons; Frequency shift keying; Low pass filters; Optical bistability; Optical devices; Optical feedback; Optical receivers; Optimized production technology; Semiconductor lasers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
