Title :
Interfaces for high speed fiber-optic links: analysis and experiment
Author :
Daryoush, Afshin S. ; Ackerman, Edward ; Samant, Niranjan R. ; Wanuga, Stephen ; Kasemset, Dumrong
Author_Institution :
Center for Microwave-Lightwave Eng., Drexel Univ., Philadelphia, PA, USA
fDate :
12/1/1991 12:00:00 AM
Abstract :
An analysis of directly and externally modulated fiber-optic links is presented. The theoretical analysis is based on the signal flow diagram of the interface circuits to the laser diode, Mach-Zehnder electro-optic modulator, and p-i-n photodiode. System parameters such as gain, noise figure, two-tone intermodulation distortion, and spurious free and compression dynamic range are expressed as a function of frequency and operating point of the laser and external modulator. Two directly and externally modulated fiber-optic links were designed and fabricated to verify the analytical models. The direct modulation FO link was developed at the Ku-band (11.6-12.4 GHz), whereas the external modulation link was at L-band (875-925 MHz). Spurious-free dynamic ranges of 95.8 dB Hz2/3 and 113 dB Hz 2/3, respectively, were achieved. The predictions based on the analytical models match the measured results
Keywords :
intermodulation; microwave links; noise; optical communication; optical communication equipment; optical links; optical modulation; 11.6 to 12.4 GHz; 875 to 925 MHz; Ku-band; L-band; Mach-Zehnder electro-optic modulator; SHF; UHF; analytical models; compression dynamic range; direct modulation; external modulation; fiber-optic links; gain; high speed; interface circuits; laser diode; noise figure; optical fibre links; p-i-n photodiode; signal flow diagram; spurious-free dynamic range; two-tone intermodulation distortion; Analytical models; Circuits; Diode lasers; Dynamic range; Electrooptic modulators; Frequency; Intermodulation distortion; Noise figure; PIN photodiodes; Signal analysis;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
