Accession Number : AD0731484

Title :   Investigation of Mode Jumping in a Q-Switched Ruby Laser.

Descriptive Note : Memorandum rept.,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Vande Kieft,Lawrence J. ; Frey,William M. ; Yunker,Philip W.

Report Date : AUG 1971

Pagination or Media Count : 17

Abstract : The paper describes a possible method of determining the extent of intensity fluctuations within a laser beam as a function of time. It is applicable to very short pulses, approximately 20 nanoseconds in duration, as well as longer pulses and C.W. because the beam is not sequentially scanned. A given part of the beam cross section can be compared with any other part at all times during the pulse. The temporal stability of a Korad, Model K-1500 giant pulse ruby laser has been investigated. The near-field beam pattern was transformed by an image dissector into a one-dimensional image. This image was then swept across a photographic film; in this way the beam intensity distribution was recorded as a continuous function of time. From this record it was determined that mode jumping was not occurring. (Author)

Descriptors :   (*COHERENT RADIATION, INTENSITY), DISTRIBUTION FUNCTIONS, LIGHT PULSES, LASERS, TEST METHODS, FIBER OPTICS

Subject Categories : Lasers and Masers
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE