Accession Number:

ADA256262

Title:

Optical Signal Distribution Schemes for Millimeter Phased Array Radar

Descriptive Note:

Final technical rept.

Corporate Author:

MINNESOTA UNIV MINNEAPOLIS DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

Report Date:

1992-05-01

Pagination or Media Count:

144.0

Abstract:

The goal is the modulation of lasers above the -3dB modulation bandwidth. The approach is to coat one laser facet with an anti-reflection coating and form an external cavity. The external cavity laser was built and characterized theoretically. An impedance-matching microstrip was designed and measured. An 8 GHz oscillator was built using a 0.3 micron MESFET. It was found that the optical feedback increases the light modulation depth by 25 dB on the first harmonic and 34dB on the second harmonic in external cavity laser diodes. The model, which has proven accurate thus far, indicates that diode parasitics make it preferable to use the second harmonic generated by a 30 GHz cavity, rather than the first harmonic from a 60 GHz cavity. Phased Arrays.

Subject Categories:

  • Electrical and Electronic Equipment
  • Lasers and Masers
  • Active and Passive Radar Detection and Equipment
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE