Laser active medium and process of manufacturing the same
AssigneeUniversitaet Wien
InventorsMarkus ASPELMEYER, Garrett COLE
Life of this patent
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Abstract
A solid-state laser active medium comprising an optical gain material; a heat sink, wherein the heat sink is transparent, in particular over a wavelength range of 200 nm to 4000 nm, preferably with an absorption coefficient of <1 cm−1; the heat sink having a high thermal conductivity, in particular ≧149 W/(m*K); wherein the optical gain material and the heat sink exhibit a root-mean square, RMS, surface roughness of <1 nm; wherein the optical gain material is attached to the transparent heat sink by direct bonding.
Claims22
A laser active medium for a solid-state laser system comprising:
- an optical gain material;
- a heat sink, wherein the heat sink is transparent within a threshold;
- the heat sink having a high thermal conductivity within a threshold;
- wherein the optical gain material and the heat sink exhibit a root-mean square surface roughness of <1 nm;
- and
- wherein the optical gain material is attached to the transparent heat sink by direct bonding.
A method for manufacturing a laser active medium comprising a semiconductor-based optical gain material, a heat sink, the heat sink having a high thermal conductivity within a threshold, and being optically transparent within a threshold;
- the method comprising the steps of:
- providing the semiconductor-based optical gain material, the optical gain material having a root-mean square surface roughness of <1 nm, on a first substrate, wherein the first substrate comprises GaAs, InP, GaN, AlN, Si, or Ge;
- providing the heat sink, the heat sink having a polished surface with a root-mean square roughness below 1 nm;
- detaching the optical gain material from the first substrate;
- attaching the optical gain material to the heat sink by direct bonding.
A method for manufacturing a laser active medium based on a doped laser crystal, comprising the doped laser crystal as the optical gain material, a heat sink, wherein the heat sink exhibits high thermal conductivity within a threshold, and being optically transparent within a threshold;
- the method comprising the steps of:
- providing the doped laser crystal with a surface roughness below 1 nm root-mean square;
- providing the transparent heat sink with a surface roughness below 1 nm root-mean square;
- attaching the laser-crystal based optical gain material to the heat sink by direct bonding.
Dependencies are inferred from the claim text.