Short Pulse Laser Modulation Techniques.

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Abstract:

Analytical and experimental results are reported on the desirability of short pulse, direct detection visible and near-IR laser communication systems. Data regimes from 10 to the 6th power to 10 to the 9th power bitssec were investigated for four laser formats - two binary formats and two M-ary formats. Comparisons with other formats including analog and CW systems are included. Experimental results verified analytical results, demonstrating background discrimination capability of short pulse techniques and the capability to efficiently convey information. In the M-ary experiments as many as 12 bitspulse were transmitted using 4095 digitally selected one nanosecond time slots. High quality TV pictures were transmitted at average detected signal to background ratios less than 0.01. 200 Mbps binary experiments were also conducted. Author

Author(s):
Ross, Monte ; Brand, Jerome P. ; Lee, Gary M.
Author Organization(s):
MCDONNELL DOUGLAS ASTRONAUTICS CO ST LOUIS MO
Descriptive Note:
Final rept. 15 Feb 69-15 Mar 70,
Pagination:
0395

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFAL-TR-70-130
Contract/Grant Number(s):
F33615-69-C-1418
Project Number(s):
AF-5244
Monitor Series:
TR-70-130
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*PULSE COMMUNICATIONS, *INFRARED COMMUNICATIONS, *SPACE COMMUNICATIONS, *LASERS, *TELEVISION SYSTEMS, *INFRARED LASERS, *PULSE MODULATION, PULSE COMMUNICATIONS, DATA TRANSMISSION SYSTEMS, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, ANALOG SYSTEMS, PULSE POSITION MODULATION, DIGITAL SYSTEMS, FREQUENCY MODULATION, TRANSMITTER RECEIVERS, DEMODULATION, POLARIZATION, OPTICAL COMMUNICATIONS, BACKGROUND, ERRORS, PHOTOELECTRONS, NEODYMIUM
Field(s)/Group(s):
Lasers and Masers, Non-Radio Communications
Keyword(s):
CONTINUOUS WAVES, DIGITAL SYSTEMS, PULSE MODULATION, *LASER COMMUNICATION SYSTEMS, M ARY MODULATION, PULSE POLARIZATION BINARY MODULATION, PULSE GATED BINARY MODULATION, PULSE INTERVAL MODULATION, PULSE GATING, YAG ALLOYS
Report Date:
1970 Jun 01