Date

March 1988

Document Type

Thesis

Degree Name

M.S.

Department

Dept. of Applied Physics

Institution

Oregon Graduate Center

Abstract

Phase-locked arrays of diode lasers emit high optical power in a spatially coherent beam. Emission can be controlled through modulation of the drive current enabling these phased array devices to produce short, high power optical pulses. The combination of these characteristics makes them directly applicable to high data rate communication systems. The temporal stability of phased arrays under pulsed operation is especially important when considering applications such as optical communication systems; however, the dynamic characteristics of these arrays are not yet well understood. A streak camera video frame-grab system was developed to analyze the dynamic characteristics of the radiation emitted by current modulated diode laser arrays. The use of a streak camera is a significant departure from the more traditional observation of the emission with a photodiode since the streak camera permits measurements to be made on a single pulse with a time resolution of a few picoseconds. In addition, the streak camera provides a three-dimensional record of intensity versus space and time which makes possible the simultaneous observation of the evolution of the intensity profile for each of the individual emitters in the array or particular spatial features of the far field. Software needed to analyze and display the intensity data has been developed. Using this software discrete fourier transforms and cross correlations of the near-field intensity of the emitters in the array, noise spectra, and halftone and graphical representations of the near- and far-field patterns' evolution may be obtained.

Identifier

doi:10.6083/M4S75D8T

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.