Accession Number : AD0912838

Title :   1000 Megabit Per Second Pulse Gated Binary Modulation Laser Transceiver Electronics Brassboard.

Descriptive Note : Final rept. Oct 72-Apr 73,

Corporate Author : MOTOROLA INC SCOTTSDALE AZ GOVERNMENT ELECTRONICS DIV

Personal Author(s) : Ryan, Carl R. ; Myer, Gerry L. ; Gardanier, Larry F.

Report Date : AUG 1973

Pagination or Media Count : 152

Abstract : The purpose of the 1000 Megabit Per Second Pulse Gated Binary Modulation (1000 Mb/s PGBM) laser transceiver electronics was to design, develop, and test transmitter and receiver electronics suitable for use in a 1000 Mb/s PGBM Mode-locked Laser Communication System. The hardware was developed with the following primary objectives: (1) The system will handle either two 500 Mb/s channels of synchronous input data or three channels (492 Mb/s, 246 Mb/s, and 246 Mb/s) of asynchronous data; (2) The data reconstruction circuitry is capable of near optimum detection of Poisson modulated 1000 Mb/s return-to-zero (rz) data; (3) An optical link simulator is provided for the electronics transceiver test; (4) High speed data sources and error detectors are included for system performance measurements. The approach in the development of this hardware was to utilize a versatile line of previously developed high speed, low power hybrid circuitry in the design of all essential components. The circuit design and layout was organized such that the system feasibility for future flight usage was well demonstrated as was future expansion capability. When tested with the optical link simulator and additive Gaussian noise, the transceiver bit error rate performance was 1.5 dB from theoretical for both synchronous and asynchronous modes of operation.

Descriptors :   *OPTICAL COMMUNICATIONS), (*LASERS, (*DATA TRANSMISSION SYSTEMS, PHASE LOCKED COMMUNICATIONS), (*PULSE COMMUNICATIONS, LASERS), DIGITAL SYSTEMS, ULTRAHIGH FREQUENCY, GATES(CIRCUITS), PULSES, TRANSMITTER RECEIVERS, CORRELATORS, ERRORS, NOISE(RADIO), RELAXATION OSCILLATORS, MULTIPLEXING, LOGIC CIRCUITS, DEMODULATION, MODULATION.

Subject Categories : Lasers and Masers
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE