Vertical surface light emitting device with multiple active layers
OwnerYiquan Liinventor
Life of this patent
Estimating the term…
Abstract
A vertical cavity surface light emitting device (VCSLED) with multiple active layers includes at least one optical resonance unit comprising a highly-doped conduction region (1), an insulating layer (2), a negative electrode (3), confinement layers (4, 6), an active layer (5), and a positive electrode (7). The optical resonance units are stacked repetitively in a vertical thickness of half wavelength to constitute an optical resonant cavity. In the laser produced from the VCSLED with multiple active layers, the VCSLED is sandwiched by reflectors (104, 105) for emitting and receiving laser light. The laser utilizes the ability of photonic crystal to emit coherent light to improve its electro-optical conversion efficiency and eliminate the fabrication of Bragg reflectors.
Claims16
A vertical cavity surface light emitting device (VCSLED), characterised in that the VCSLED comprises
- at least three optical resonance units,
- each optical resonance unit has a vertical thickness of half wavelength of the emitted light of the VCSLED, and comprises a highly-doped conduction region, an insulating layer, a negative electrode, confinement layers, an active layer, and a positive electrode,
- wherein the at least three optical resonance units are stacked repetitively vertically to constitute an optical resonant cavity having multiple active layers.
A laser, comprising:
- a vertical cavity surface light emitting device (VCSLED) with multiple active layers, including at least one optical resonance unit comprising a highly-doped conduction region, an insulating layer, a negative electrode, confinement layers, an active layer, and a positive electrode, wherein the optical resonance units are stacked repetitively in a vertical thickness of half wavelength to constitute an optical resonant cavity;
- reflectors that sandwich the VCSLED by the reflectors to emit and receive laser light;
- and
- piezoelectric crystals disposed between a plurality of chips to maintain active layers between the chips to be spaced apart at integer multiples of wavelength.
A laser, comprising:
- a vertical cavity surface light emitting device (VCSLED) with multiple active layers, including at least one optical resonance cavity comprising a highly-doped conduction region, an insulating layer, a negative electrode, confinement layers, one or more parameter measuring electrodes arranged between the confinement layers to detect light field parameters inside the optical resonant cavity, an active layer, and a positive electrode, wherein the optical resonance units are stacked repetitively in a vertical thickness of half wavelength to constitute an optical resonant cavity;
- reflectors that sandwich the VCSLED by the reflectors to emit and receive laser light;
- and
- a parameter feedback calculation module connected to the parameter measuring electrodes and to piezoelectric crystals.
Dependencies are inferred from the claim text.