Accession Number:

ADA021995

Title:

Tunable Far-Infrared and Submillimeter Sources.

Descriptive Note:

Final technical rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE FRANCIS BITTER NATIONAL MAGNET LAB

Personal Author(s):

• Lax,Benjamin

Report Date:

1975-01-01

Pagination or Media Count:

18.0

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.

Descriptors:

• *TUNABLE LASERS
• *FAR INFRARED RADIATION
• *SUBMILLIMETER WAVES
• GALLIUM ARSENIDES
• PULSED LASERS
• SEMICONDUCTORS
• INFRARED LASERS
• NONLINEAR SYSTEMS
• CARBON DIOXIDE LASERS
• CONTINUOUS WAVE LASERS
• OPTICAL PUMPING
• TEA LASERS

Subject Categories:

• Lasers and Masers
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE