Accession Number : ADD014612

Title :   Analog Frequency Modulated Laser Using Magnetostriction.

Descriptive Note : Patent, filed 13 Nov 89, patented 26 Jun 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kabacoff, Lawrence T

Report Date : 26 Jun 1990

Pagination or Media Count : 7

Abstract : The present invention relates to an analog frequency modulatable laser. The radiation of the lasing medium is analog frequency modulated by change of the optical path length by movement of reflective mirrors forming the resonant cavity at the frequency of radiation of the laser in a manner corresponding to an information signal. In one embodiment, a magnetostrictive material is deposited on and bonded to the outer periphery of an active lasing medium having appropriate mirrors on the end thereof. The magnetostrictive material is exposed to an information encoded magnetic field and physically expands or contracts the physical length of the lasing medium along the optical axis of the lasing medium corresponding to the modulated information of the magnetic field. In another embodiment an optical fiber is secured by cementing or clamping to a transparent end of the active lasing material and one of the optical cavity reflecting mirrors is disposed on the outside end of the optical fiber with the magnetostrictive material being disposed on the optical fiber. Patents. (SDW)

Descriptors :   *LASERS, *MAGNETOSTRICTION, *PATENTS, ANALOG SYSTEMS, CAVITIES, CODING, FIBER OPTICS, FREQUENCY, FREQUENCY MODULATION, INFORMATION SCIENCES, LENGTH, MAGNETIC FIELDS, MATERIALS, MIRRORS, MODULATION, OPTICAL PROPERTIES, OPTICS, PATHS, PHYSICAL PROPERTIES, REFLECTION, RESONANCE, SIGNALS

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE