High-Efficiency, Single-Frequency Laser and Modulator Study

Abstract

Theoretical and experimental studies on (1) mode filters for single- frequency Nd:YAG lasers and (2) wide-bandwidth optical modulators are reported. Stable single-frequency output power of 0.8W was obtained from a Nd:YAG laser pumped by a 1-kW tungsten lamp. The mode filter consisted of a tilted etalon and a thin metallic film in the laser cavity. Detailed analyses have been made to reduce the insertion loss of mode filters to an absolute minimum so that efficiency can be increased. The electrooptic modulator uses a microwave interdigital filter structure and has a 1.4-GHz bandwidth. A new circuit design aimed at increasing modulation depth for a given rf power has been obtained and tested. No optical damage or beam distortion of LiNbO3 was observed under continuous radiation of 14 kW/sq cm green light when the crystal was at 180C.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1971
Accession Number
AD0738489

Entities

People

  • H. V. Hance
  • J. Kannelaud
  • K. K. Chow
  • Robert C. Ohlmann
  • W. B. Leonard
  • W. Culshaw

Organizations

  • Lockheed Martin Missiles and Space

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Bandwidth
  • Cavity Resonators
  • Fabrication
  • Frequency Response
  • Geometry
  • Insertion Loss
  • Laser Beams
  • Laser Mirrors
  • Laser Resonators
  • Lasers
  • Modulation
  • Optical Modulators
  • Refractive Index
  • Silica Glass
  • Solid State Lasers
  • Waveplates
  • Yag Lasers

Fields of Study

  • Physics

Readers

  • Microwave Engineering.
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy