DocumentCode :
745634
Title :
An Experimental 50 Mb/s Fiber Optic PCM Repeater
Author :
Runge, Peter K.
Author_Institution :
Bell Labs., Holmdel, NJ, USA
Volume :
24
Issue :
4
fYear :
1976
fDate :
4/1/1976 12:00:00 AM
Firstpage :
413
Lastpage :
418
Abstract :
An experimental repeater for amplification and regeneration of 50 Mb/s fiber-optical pulses has been built and tested. For the receiver either Si p-i-n or avalanche photodiodes are used in conjunction with a high impedance FET input amplifier. The high voltage for the avalanche photodiode is generated internally and controlled by the received signal. This AGC circuit is capable of compensating for temperature changes of the avalanche gain over the range of 
C. The optical transmitter consists of either a GaAs light emitting diode or a GaA1As laser diode coupled to optical fibers and directly modulated by a current driver with 30 percent electrical efficiency. For 10-9error rate, the required average optical signal power for a pseudorandom signal is p-i-n diode: -41.5 dBm; avalanche diode: -56.6 dBm. The optical output power into a fiber with 1 percent index difference is LED: -17 dBm; GaAlAs laser: 0 dBm. The repeater power requirement is about 2 W.
C. The optical transmitter consists of either a GaAs light emitting diode or a GaA1As laser diode coupled to optical fibers and directly modulated by a current driver with 30 percent electrical efficiency. For 10-9error rate, the required average optical signal power for a pseudorandom signal is p-i-n diode: -41.5 dBm; avalanche diode: -56.6 dBm. The optical output power into a fiber with 1 percent index difference is LED: -17 dBm; GaAlAs laser: 0 dBm. The repeater power requirement is about 2 W.Keywords :
Avalanche photodiodes; FET amplifiers; Gallium alloys/compounds, lasers; Light-emitting diodes (LED´s); Optical fiber communication; PCM communication; Photodiodes; Wire communication repeaters; p-i-n diodes; Avalanche photodiodes; Light emitting diodes; Optical fiber testing; Optical fibers; Optical modulation; Optical receivers; Optical transmitters; Phase change materials; Pulse amplifiers; Repeaters;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOM.1976.1093308
Filename :
1093308
Link To Document :
