Solid state light source for emitting light over a broad spectra

Details Solid state light source for emitting light over a broad spectra Solid state light source for emitting light over a broad spectra

1989-03-21

1991-09-03

Hille, Rolf

Coherent light generators

Particular component circuitry

Optical pumping

357 4, 357 16, 372 43, 372 44, 372 45, H01L 3300

Patent

active

050458965

ABSTRACT:
A solid state light source comprising a monolithic light emitter diode structure having a graded bandgap active region 8 the thickness of which is graded between two materials 9, 11, the said materials having differing center wavelengths of light emission, such that the source is capable of emitting light at wavelengths L1, L2 spaced over the whole spectral width between the wavelengths exhibited by the said two materials. This can enable the light source to be used in optical fibre devices where it can provide on alternative to the filament lamp source and thus give an increased reliability in use.

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Capasso et al., "The Superlattice Photodetector . . . Rates Ratio", IEEE, pp. 284-287, 1981.
Judd et al., "Observation of Discrete . . . Low Temperatures", Appl. Phys. Lett. 49(24), 12/86.

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