Brassboard Modulator I.
Abstract
An optional modulator assembly developed under a previous contract was modified and repackaged to be the modulator for a brassboard laser communication system. The system operated at 0.53 micrometer wavelength and transmitted 1 Gbit/sec of information using a quadriphase-shift-keyed microwave subcarrier impressed on the optical carrier. The brassboard modulator included the electrooptical modulator, environmental control equipment, mounting hardware, and a solid-state driver. Four optical modulators were constructed using either lithium niobate (LiNbO3) or lithium tantalate (LiTa03) as the electrooptical crystal. The environmental control equipment provided a warm temperature for the electrooptical crystal and, using a combination of fine temperature adjustment and control of a dc voltage applied to the crystal, maintained the proper electrooptic bias condition. The solid-state driver with over 30dB of gain was capable of providing as much as 5 W of power to the optical modulator over the frequency range 1 to 2 GHz.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1973
- Accession Number
- AD0918052
Entities
People
- J. J. Younger
- K. K. Chow
- W. B. Leonard
Organizations
- Lockheed Martin Missiles and Space