Accession Number : ADA248594

Title :   Development of High Stability Analog Fiber Optic Links.

Descriptive Note : Final rept. Sep 88-Dec 90,

Corporate Author : JET PROPULSION LAB PASADENA CA

Personal Author(s) : Logan, Ronald T., Jr. ; Lutes, George ; Primas, Lori ; Maleki, Lute

Report Date : DEC 1991

Pagination or Media Count : 36

Abstract : This report summarizes the analysis and experiments which were conducted to identify sources of Close to Carrier (CTC) noise in semiconductor laser diodes. The experiments were conducted. Following the initial experiments a set of criteria was established for a fiber optic system with improved noise. An analog microwave optical system was fabricated to verify the results of the study at a frequency of 8.1 GHz. The results show a CTC noise of -95 DBc/Hz from the 8.1 GHz carrier, well below the CTC noise of the best crystal oscillators. The report recommends that for improved RF phase stability in fiber optic links, greater than 60 dB isolation is recommended to protect the laser diode from reflection, less than 5mm separate the diode from the first optical reflection, and that the laser be temperature controlled to 0.1 C or better. Lasers, Fiber Optics, Noise, Optical transmission.

Descriptors :   *OPTICS, ANALOGS, CRYSTAL OSCILLATORS, CRYSTALS, DIODES, FIBER OPTICS, FIBERS, FREQUENCY, ISOLATION, LASERS, MICROWAVES, NOISE, OSCILLATORS, PHASE, REFLECTION, SEMICONDUCTOR LASERS, SEMICONDUCTORS, SOURCES, STABILITY, TEMPERATURE.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE