Title :
A highly sensitive balanced receiver for 2.5 Gb/s heterodyne detection systems
Author :
Ohkawa, Norio ; Sugie, Toshihiko ; Hayashi, Yoshihiro
Author_Institution :
NTT Transmission Syst. Lab., Kanagawa, Japan
fDate :
4/1/1991 12:00:00 AM
Abstract :
A highly sensitive balanced receiver consisting of a high electron mobility transistor (HEMT) preamplifier, applying inductive peaking techniques and a newly designed optical front-end coupler, is proposed for 2.5-Gb/s heterodyne detection systems. A 8.7-pA/ square root Hz averaged equivalent input noise current density and over 23-dB common mode rejection ratio from 2 to 8 GHz were achieved. A 2.5-Gb/s CPFSK heterodyne detection with 66 photon/bit was carried out. The power penalties due to thermal noise and relative intensity noise were confirmed to be only 0.22-dB and under 0.08-dB, respectively.<>
Keywords :
demodulation; frequency shift keying; high electron mobility transistors; optical communication equipment; receivers; sensitivity; 2 to 8 GHz; 2.5 Gbit/s; CPFSK heterodyne detection; common mode rejection ratio; frequency shift keying; heterodyne detection systems; high electron mobility transistor; highly sensitive balanced receiver; inductive peaking techniques; input noise current density; optical front-end coupler; power penalties; preamplifier; relative intensity noise; thermal noise; Electron optics; HEMTs; MODFETs; Optical design; Optical design techniques; Optical mixing; Optical noise; Optical receivers; Optical sensors; Preamplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
