Behaviour of a Quantum Well Laser Under High Optical Excitation,

Abstract

We have used luminescence spectroscopy with subpicosecond resolution in order to study comparatively the behaviour of quantum well (QW) laser structures with different confinement layer (CL) geometries: SCH (Separate confinement heterostructure), P- or LGRINSCH (Parabolically or Linearly graded Index SCH). The three structures consist of a 50 angstrom QW with a CL of 2000 angstrom on each side. 600 fs long pulses at 2.04 eV, generated by an hybrid dye laser synchronously pumped by the doubled output of an YAG:Nd laser, are used to excite the sample and to detect luminescence, with a resolution equivalent to the pulse width, by upconversion in a LiIO3 non linear crystal. This technique allows the characterization of two processes of great interest for the behaviour of QW lasers. First the trapping dynamics of carriers into the QW which will obviously limit the high frequency operation of such devices. Second, the radiative properties of these structures under high excitation conditions (where laser action is possible provided enough feedback is put into the system).

Document Details

Document Type
Technical Report
Publication Date
May 22, 1992
Accession Number
ADP007848

Entities

People

  • B. Devaud
  • F. Clerot
  • S. Morin

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Dye Lasers
  • Excitation
  • Frequency
  • Frequency Combs
  • Heterojunctions
  • Laser Applications
  • Laser Spectroscopy
  • Lasers
  • Liquid Dye Lasers
  • Luminescence
  • Optoelectronics
  • Quantum Well Lasers
  • Quantum Wells
  • Spectroscopy

Fields of Study

  • Materials science

Readers

  • Optical Physics and Photonics.
  • Semiconductor Device Technology
  • Structural Dynamics.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers
  • Quantum Computing