SOLID STATE TECHNIQUES FOR MODULATION AND DEMODULATION OF OPTICAL WAVES.
Quarterly progress rept. no. 7, 1 Jan-31 Mar 65,
TEXAS INSTRUMENTS INC DALLAS APPARATUS DIV
Pagination or Media Count:
Modulation Preliminary tests were conducted with KTN Potassium tantalate niobate. The observed clearing of the optical effects of crystal strains with applied bias fields is consistent with the results of an analytical development of the effect of strains in cubic crystals. Several in-cavity modulation techniques were studied, including the 45 degree Z-cut KDP configuration and also quartz in a standing-wave diffraction grating structure. Low-temperature measurements on deuterated KDP Potassium dihydrogen phosphate were in progress as the contract period ended. Modulator-demodulator systems An attempt was made to transmit carrier band modulated laser light through the 1-km light pipe at Ft. Monmouth. The received light signal was of sufficient quality and intensity for good demodulator performance, but overall picture quality was poor. Failure was attributed to poor performance of standard components, in particular a poor signal level available from the rooftop antenna and excessive noise from the broadband TV booster amplifier. Author