Accession Number:

AD0488026

Title:

COHERENT OPTICAL ARRAY TECHNIQUES.

Descriptive Note:

Interim quarterly rept. no. 2, 3 Aug-2 Nov 65.

Corporate Author:

SPERRY GYROSCOPE CO GREAT NECK NY ELECTRO-OPTICS GROUP

Personal Author(s):

Report Date:

1966-06-01

Pagination or Media Count:

50.0

Abstract:

Studies are being conducted to determine the feasibility of a coherent optical array radar system operating at a wavelength of 1.06 microns using neodymium-doped host materials as the active media. An important step in this study is to demonstrate coherent amplification of a laser oscillator signal introduced into two separate Ndglass amplifiers with subsequent recombination into a single output signal. The experimental configuration for this work is a Mach-Zehnder interferometer having an input beam-splitter with separate paths for the reflected and transmitter beams, each path containing a laser amplifier. The two signals are arranged to recombine at another beam-splitter. Recombination into a single output beam occurs if optical phase lengths of the separated paths are multiples of 2 pi radians. A servo system for automatic interpulse stabilization of the path length difference between the two paths of the Mach-Zehnder has been constructed and tested with excellent results.

Subject Categories:

  • Lasers and Masers
  • Infrared Detection and Detectors
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE