High thermal conductivity vertical cavity surface emitting laser (VCSEL)
First Claim
1. A vertical cavity surface emitting laser (VCSEL), comprising:
- a light generation layer configured to generate light having a known wavelength;
a reflector;
at least one high thermal conductivity (HTC) layer disposed between the light generation layer and the reflector, the HTC layer having a thickness defined by an integer multiple of one-half the known wavelength, the HTC layer in consequence being substantially optically transparent to the generated light and having optical properties independent of the refractive indices of other layers in contact therewith, the HTC layer having a thermal conductivity exceeding that of the reflector, the HTC layer further being configured to remove and dissipate heat generated by the light generation layer.
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Abstract
A light generating device such as a VCSEL includes a light generation layer, a top reflector, a bottom reflector, and a high thermal conductivity (HTC) layer between the light generation layer and the bottom reflector. The light generation layer is adapted to generate light having a first wavelength. Heat produced at the light generation layer is more efficiently dissipated due to the presence of the HTC layer. Alternatively, a light generating device such as a VCSEL includes a light generation layer, a top reflector, and a high thermal conductivity (HTC) bottom reflector. Heat produced at the light generation layer is more efficiently dissipated due to the fact that the bottom reflector is a HTC DBR reflector having lower thermal resistivity than a conventional DBR reflector.
44 Citations
10 Claims
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1. A vertical cavity surface emitting laser (VCSEL), comprising:
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a light generation layer configured to generate light having a known wavelength; a reflector; at least one high thermal conductivity (HTC) layer disposed between the light generation layer and the reflector, the HTC layer having a thickness defined by an integer multiple of one-half the known wavelength, the HTC layer in consequence being substantially optically transparent to the generated light and having optical properties independent of the refractive indices of other layers in contact therewith, the HTC layer having a thermal conductivity exceeding that of the reflector, the HTC layer further being configured to remove and dissipate heat generated by the light generation layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification