Tunable Far-Infrared and Submillimeter Sources.
Abstract
This report is a summary of the work done towards the development of tunable submillimeter and far infrared (FIR) radiation sources. In this work the authors developed the principle of noncollinear phase-matched difference-frequency optical mixing of two laser beams for the generation of FIR radiation. Using this technique the authors demonstrated wide range of tunability of FIR from about 70 micrometer to several mm by mixing two grating-tuned pulsed TEA CO2 laser beams in a crystal of GaAs. New noncollinear 'folded' geometries were considered and used to increase the mixing efficiency. In addition to the pulsed system, the authors also demonstrated for the first time narrow bend cw generation of FIR tunable over the same wavelength region. In the last year additional improvements and modifications have been made in both the pulsed and cw systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1975
- Accession Number
- ADA021995
Entities
People
- Benjamin Lax
Organizations
- Massachusetts Institute of Technology