Holmium Doped Solid State Laser Resonantly Pumped and Q-Switched by Novel GaSb-Based Photonic Devices

Abstract

A highly efficient Ho3+-doped fluoride glass fiber laser operating at 2.08 m is demonstrated using nearly resonant pumping at 1.94 m by GaSb-based diode lasers. A maximum slope efficiency of 78% and output power above 500 mW were obtained. Asymmetric laser heterostructure was developed to improve beam properties of GaSb-based diode lasers. Multimode 100- m-wide ridge waveguide lasers with ~40 degrees fast axis beam divergence demonstrated output power of about 1.5 W CW at 20 C. High-power 2.2 m broadened waveguide diode lasers demonstrate internal optical loss below 4 cm-1, threshold current density below 100 A/cm2 and CW output power of 1.6 W. Linear laser arrays generated above 25 W of quasi-CW output power. The device power conversion efficiencies were better than 20% in peak and above 10% at maximum output power level. Diode lasers operating at 2.7 m with room-temperature CW output power of 600 mW and peak power-conversion efficiency of 10% were demonstrated. Ridge waveguide diode lasers operating in the spectral region near 3.15 m demonstrated single spatial mode CW output power of 9 mW at 20 C and operated up to 40 C in CW regime.

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Document Details

Document Type
Technical Report
Publication Date
Aug 31, 2011
Accession Number
ADA564679

Entities

People

  • L. Shterengas

Organizations

  • State University of New York

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Detectors
  • Energy Bands
  • Far Field
  • Fermi Levels
  • Frequency Combs
  • Glass Fibers
  • Jet Propulsion
  • Laser Applications
  • Laser Arrays
  • Laser Diodes
  • Laser Spectroscopy
  • Lasers
  • Optical Fiber Lasers
  • Quantum Wells
  • Semiconductors
  • Spectra
  • Spectroscopy

Fields of Study

  • Physics

Readers

  • Electronics Engineering
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy