Title :
Optical phase-locked PSK heterodyne experiment at 4 Gb/s
Author :
Kazovsky, L.G. ; Atlas, D.A. ; Smith, R.W.
Author_Institution :
Bell Commun. Res., Red Bank, NJ, USA
Abstract :
A 4 Gb/s phase-locked optical PSK (phase shift keying) heterodyne communication system is demonstrated. The receiver was implemented with a single 100- Omega loaded p-i-n photodiode and a 1320-nm diode-pumped miniature Nd:YAG laser as a local oscillator. For a 2/sup 7/-1 PRBS (pseudorandom bit sequence), the receiver sensitivity was -34.2 dBm or 631 photons/bit. The corresponding power on the surface of the detector was -37.3 dBm or 309 photons/bit. With a 2/sup 15/-1 PRBS, a 2.6 dB additional sensitivity degradation was observed due to the nonideal frequency response of the phase modulator and the receiver amplifiers.<>
Keywords :
demodulation; optical communication equipment; optical modulation; p-i-n diodes; phase shift keying; photodiodes; receivers; sensitivity; solid lasers; 100 ohm; 1320 nm; 4 Gbit/s; YAG:Nd; YAl5O12:Nd; diode-pumped miniature Nd:YAG laser; heterodyne communication; local oscillator; nonideal frequency response; optical PSK; p-i-n photodiode; phase modulator; phase shift keying; phase-locked PSK heterodyne experiment; pseudorandom bit sequence; receiver; receiver amplifiers; receiver sensitivity; sensitivity degradation; Degradation; Detectors; Frequency response; Local oscillators; Optical mixing; Optical receivers; Optical sensors; P-i-n diodes; PIN photodiodes; Phase shift keying;
Journal_Title :
Photonics Technology Letters, IEEE
