Abstract

A novel p-Ge laser at 165-205 μm wavelengths in Voigt configuration using a regular permanent magnet has been developed and is described here. The necessary magnetic field is provided by a permanent magnet for the first time. Experiments with the traditional, Faraday-configured, superconducting magnet are performed for comparison. Emission is observed over a wider range of electric-field magnitude in Voigt configuration at a· given magnetic field than in Faraday configuration. The spectral response of several different inductive metal meshes for use as output couplers is presented. The widest electric-and magnetic-field range for laser emission was found using a #750 copper mesh output coupler. Time resolved emission studies reveal unusual pulse dynamics which depends on the magnitude and duration ofthe applied electric field. The spectral content, Gaussian beam profiles, and polarization are essentially independent ofthe temporal effects. The increased delay of the emission pulse with the increasing initial sample temperature and the temperature independence ofthe emission quench time are both explained by Joule heating ofthe laser medium. Lasing action takes place even above 10 K, raising the possibility of developing a practical p-Ge laser without using liquid helium as a coolant.

Graduation Date

1997

Semester

Summer

Advisor

Peale, Robert E.

Degree

Doctor of Philosophy (Ph.D.)

College

College of Engineering

Department

Electrical and Computer Engineering

Format

PDF

Pages

129 p.

Language

English

Length of Campus-only Access

None

Access Status

Doctoral Dissertation (Open Access)

Identifier

DP0029470

Subjects

Dissertations, Academic -- Engineering; Engineering -- Dissertations, Academic

Accessibility Status

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