Title :
4-Gb/s PSK homodyne transmission system using phase-locked semiconductor lasers
Author :
Kahn, J.M. ; Gnauck, A.H. ; Veselka, J.J. ; Korotky, S.K. ; Kasper, B.L.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
fDate :
4/1/1990 12:00:00 AM
Abstract :
Homodyne detection of 4-Gb/s pilot-carrier binary-phase-shift-keyed (BPSK) optical signals using external-cavity semiconductor lasers synchronized by a linear phase-locked loop is discussed. A 2/sup 15/-1 pseudorandom binary sequence (PRBS) has been transmitted through a short fiber with a receiver sensitivity of -44.2 dBm or 72 photons/bit. After transmission through 167 km of standard single-mode fiber, the sensitivity is -43.6 dBm or 83 photons/bit. A balanced PIN/HEMT transimpedance receiver which has a 3-dB bandwidth from 100 kHz to 10.1 GHz and an average equivalent input noise current of 10.8 pA/ square root Hz is used.<>
Keywords :
optical links; phase shift keying; phase-locked loops; semiconductor junction lasers; 100 kHz to 10.1 GHz; 167 km; 4 Gbit/s; BPSK; PSK homodyne transmission system; average equivalent input noise current; balanced PIN/HEMT transimpedance receiver; bandwidth; external-cavity semiconductor lasers; homodyne detection; linear phase-locked loop; phase-locked semiconductor lasers; pilot carrier binary phase shift keyed optical signals; pseudorandom binary sequence; receiver sensitivity; short fiber; standard single-mode fiber; Binary phase shift keying; Binary sequences; Fiber lasers; HEMTs; Optical receivers; Optical sensors; Phase detection; Phase locked loops; Phase shift keying; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
