Accession Number:

ADA064702

Title:

Optical-Microwave Interactions in Semiconductor Devices.

Descriptive Note:

Quarterly rept. no. 2, 1 Oct-31 Dec 78,

Corporate Author:

HUGHES RESEARCH LABS MALIBU CALIF

Personal Author(s):

Report Date:

1979-01-01

Pagination or Media Count:

50.0

Abstract:

The feasibility of achieveing optical injection locking of millimeter-wave IMPATT oscillators was investigated by calculating the efficiency of subharmonic optical injection locking of IMPATT oscillators. Calculations were carried out by adding a time-varying reverse saturation current term, which was generated by the incident optical signal, to the IMPATT avalanche equation. The results indicated that a locking range on the order of 100 MHz could be achieved for X-band IMPATT oscillators if modulated optical signal was converted into rf photocurrent efficiently. The injection-locking characteristics of X-band Si IMPATT oscillators were further investigated by measuring the locking range as a function of locking gain. Subharmonic locking was used with a frequency ratio ranging from 31 to 81. It was observed that a locking range of several megahertz was achievable with an oscillator at 8.11 GHz. It was also noted that even subharmonic locking was preferred over odd subharmonic locking for our oscillators.

Subject Categories:

  • Lasers and Masers
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE