Optically Induced AM and FM in IMPATT Diode Oscillators

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Optical modulation of an IMPATT oscillator is investigated both theoretically and experimentally. Detailed computer simulations of the oscillatory dynamics are used to determine the basic mechanisms responsible for optical modulation and to examine the extent of and means for optimizing the optical response. It is shown that optically induced changes in the conduction current minimum and in the levels of carrier slowdown or depletion-region modulation are the primary mechanisms responsible for optical modulation. Amplitude modulation via an optical quenching of the oscillations is found to be the dominant response, although optical enhancement is also possible under certain conditions. It is demonstrated that substantial levels of FM can also be produced, despite the fact that the IMPATT susceptance is insensitive to illumination. The experimental results are found to be in general agreement with the predictions of the theory. It is concluded that the optical response of the IMPATT is sufficient to make optical modulation a useful technique.

Original languageEnglish (US)
Pages (from-to)426-432
Number of pages7
JournalIEEE Transactions on Electron Devices
Volume27
Issue number2
DOIs
StatePublished - 1980
Externally publishedYes

Fingerprint

IMPATT diodes
avalanche diodes
Light modulation
light modulation
frequency modulation
oscillators
Amplitude modulation
Quenching
depletion
computerized simulation
Lighting
illumination
quenching
Modulation
modulation
conduction
oscillations
augmentation
Computer simulation
predictions

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy (miscellaneous)

Cite this

Optically Induced AM and FM in IMPATT Diode Oscillators. / Kiehl, Richard.

In: IEEE Transactions on Electron Devices, Vol. 27, No. 2, 1980, p. 426-432.

Research output: Contribution to journalArticle

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