Optical Fiber, Optical Fiber Preparation Method, and Optical Fiber Amplifier
US-2025316945-A1 · Oct 9, 2025 · US
doped with rare earth metals and aluminium, e.g. Er-Al co-doped
doped with rare earth metals and aluminium, e.g. Er-Al co-doped · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C03B2201/36 |
| Official title | doped with rare earth metals and aluminium, e.g. Er-Al co-doped |
| Display label | doped with rare earth metals and aluminium, e.g. Er-Al co-doped |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 8 |
| 2017 | 3 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 5 |
| 2021 | 4 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Pedestal-free, thulium-doped optical fiber
US-2025149843-A1 · May 8, 2025 · US
Radiation-resistant laser optical fiber preform core rod and preparation method therefor
US-12001052-B2 · Jun 4, 2024 · US
Microheater comprising a rare earth-doped optical fiber
US-11880062-B2 · Jan 23, 2024 · US
Photodarkening-resistant ytterbium-doped quartz optical fiber and preparation method therefor
US-11780768-B2 · Oct 10, 2023 · US
Manufacturing method for optical fiber and manufacturing apparatus for optical fiber
US-11667560-B2 · Jun 6, 2023 · US
System and method for optical fiber preform preparation via high-surface-area coating
US-11655183-B2 · May 23, 2023 · US
Method and apparatus for producing a glass component
US-11512017-B2 · Nov 29, 2022 · US
Radiation-resistant laser optical fiber preform core rod and preparation method therefor
US-2022342147-A1 · Oct 27, 2022 · US
Process of fabrication of Erbium and Ytterbium-co-doped multi-elements silica glass based cladding-pumped fiber
US-11407671-B2 · Aug 9, 2022 · US
System and method for optical fiber preform preparation via high-surface-area coating
US-2021387903-A1 · Dec 16, 2021 · US
Manufacturing method for optical fiber and manufacturing apparatus for optical fiber
US-2021292223-A1 · Sep 23, 2021 · US
Optical tube waveguide lasing medium and related method
US-11114812-B2 · Sep 7, 2021 · US
Photodarkening-resistant ytterbium-doped quartz optical fiber and preparation method therefor
US-2021230051-A1 · Jul 29, 2021 · US
Method for producing a component of rare earth metal-doped quartz glass
US-10851008-B2 · Dec 1, 2020 · US
Method and apparatus for producing a glass component
US-2020277217-A1 · Sep 3, 2020 · US
Microheater comprising a rare earth-doped optical fiber
US-2020174184-A1 · Jun 4, 2020 · US
Optical tube waveguide lasing medium and related method
US-2020127435-A1 · Apr 23, 2020 · US
Optical tube waveguide lasing medium and related method
US-10574021-B2 · Feb 25, 2020 · US
Process of fabrication of erbium and ytterbium-co-doped multi-elements silica glass based cladding-pumped fiber
US-2019375672-A1 · Dec 12, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C03B2201/36?
- CPC C03B2201/36 is the Cooperative Patent Classification code for “doped with rare earth metals and aluminium, e.g. Er-Al co-doped.”
- How many patents are filed under CPC C03B2201/36 (doped with rare earth metals and aluminium, e.g. Er-Al co-doped)?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC C03B2201/36 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).