Meetopstelling van een Gepulste CO2 Laser Afstandsmeter met Heterodyne Detectie (Experimental Set-Up for a Pulsed CO2 Laser Range-Finder with Heterodyne Detection)

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Abstract:

The realization is described of a pulse CO2 laser rangefinder with heterodyne detection. The realized system can be used to measure the range to and in the future also the speed of diffuse reflecting targets. The rangefinder uses a hybrid CW-TEA laser as emitter and an RF laser as local oscillator. The stabilization of these lasers is described in detail. The frequency offset between the transmitted laser pulse and the local oscillator laser is locked at 20 MHz. The long term 20 to 30 minutes variation in this offset frequency is limited to 50 kHz. The effects of pulsing on this stabilization are eliminated. A start has been made with the signal processing. A rough model of the laser pulse and its frequency characteristics has been developed. An AM-demodulator is realized to determine the envelope of the reflected pulses. Keywords Range finding Laser applications.

Author(s):
Bloem, J.
Author Organization(s):
FYSISCH EN ELEKTRONISCH LAB TNO THE HAGUE (NETHERLANDS)
Supplementary Note:
Text in Dutch; Abstract in English and Dutch.
Pagination:
0058

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
FEL-90-A125, TDCK-0944-64
Monitor Series:
0944-64, X5
 Subject Terms
Modernization Areas:
Directed Energy
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*RANGE FINDING, *SIGNAL PROCESSING, *PULSED LASERS, REFLECTION, TARGETS, LASERS, LASER APPLICATIONS, PULSES, RADIOFREQUENCY, LOCAL OSCILLATORS, FREQUENCY SHIFT, HETERODYNING, DETECTION, DIFFUSE REFLECTION, FREQUENCY
Field(s)/Group(s):
Electrooptical and Optoelectronic Devices, Active and Passive Radar Detection and Equipment, Target Direction, Range and Position Finding, Optics
Report Date:
1990 Aug 01