Self-seeding high power laser
US-9502854-B1 · Nov 22, 2016 · US
Glass core planar waveguide laser amplifier
US8977097B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8977097-B2 |
| Application number | US-65890610-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 17, 2010 |
| Priority date | Feb 17, 2010 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
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A planar waveguide with a glass core and a crystalline cladding. In a specific embodiment, the core is doped preferably with Neodymium, Ytterbium, or Erbium. In the best mode, the core is athermal glass with a refractive index uniformity 10 −6 or better and the crystalline cladding has a refractive index lower than that of the core by 10 −4 to 10 −3 with a refractive index uniformity of 10 −4 . The cladding has high transparency at pump and lasing wavelengths. The coefficient of thermal expansion of the cladding is close to that of the core. In illustrative embodiments, the cladding is Sapphire and the core is aluminate glass. In an alternative embodiment, the cladding is crystal quartz and the core—is phosphate glass. By utilizing different materials for the core and cladding, the properties of each are optimized. Use of glass for the core allows much more flexibility in tailoring the properties of the core and the PWG geometry readily accommodates the low thermal conductivity of a glass core because the overall thermal performance is dominated by the higher thermal conductivity of the crystalline cladding.
First claim
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What is claimed is: 1. A planar waveguide comprising: a substantially planar glass core; and a crystalline cladding disposed on opposite sides of the core, wherein the glass core has a coefficient of thermal expansion that is within 1 part per million per degree Celsius (ppm/° C.) to that of the crystalline cladding by doping the glass core, wherein the glass core comprises a thermal conductivity at least ten times lower than a thermal conductivity of the crystalline claddin…
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Classifications
- H01S3/0632Primary
Electricity · mapped topic
Physics · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8977097B2 cover?
- A planar waveguide with a glass core and a crystalline cladding. In a specific embodiment, the core is doped preferably with Neodymium, Ytterbium, or Erbium. In the best mode, the core is athermal glass with a refractive index uniformity 10 −6 or better and the crystalline cladding has a refractive index lower than that of the core by 10 −4 to 10 −3 with a refractive index uniformity of 10 −…
- Who is the assignee on this patent?
- Filgas Davis M, Raytheon Co
- What technology area does this patent fall under?
- Primary CPC classification H01S3/0632. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 10 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).