G02B 6/02304
Core having lower refractive index than cladding
Official title: {Core having lower refractive index than cladding, e.g. air filled, hollow core}
G02B6/02304 (Core having lower refractive index than cladding) appears on 115 US grants and 153 published applications in this corpus.
Search patents in G02B- Granted patents
- 115
- Published applications
- 153
- Assignees
- 76
- Inventors
- 290
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2002 | 1 | 6 |
| 2003 | 3 | 8 |
| 2004 | 5 | 5 |
| 2005 | 3 | 10 |
| 2006 | 3 | 6 |
| 2007 | 9 | 9 |
| 2008 | 9 | 6 |
| 2009 | 6 | 9 |
| 2010 | 6 | 5 |
| 2011 | 4 | 3 |
| 2012 | 6 | 5 |
| 2013 | 3 | 5 |
| 2014 | 3 | 3 |
| 2015 | 3 | 3 |
| 2016 | 2 | 2 |
| 2017 | 4 | 4 |
| 2018 | 3 | 1 |
| 2019 | 6 | 7 |
| 2020 | 5 | 7 |
| 2021 | 5 | 7 |
| 2022 | 5 | 10 |
| 2023 | 8 | 6 |
| 2024 | 3 | 13 |
| 2025 | 6 | 5 |
| 2026 | 4 | 8 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Hollow-core optical fibers22 Sep 2026US 12,742,925 B2Corning Incorporated
- Hollow core fiber with passivation protected ends9 Jun 2026US 12,650,555 B2Honeywell International Inc.
- Organically modified chalcogenide polymer preforms and fibers19 May 2026US 12,631,817 B2The Government of the United States of America, as represented by the Secretary of the Navy
- Hollow-core optical fibers and methods for producing the same21 Apr 2026US 12,607,800 B2Corning Incorporated
- Terminated hollow-core fiber with suspended fiber-end23 Dec 2025US 12,504,583 B2Coherent Scotland Limited
- Architecture for electromagnetic waveguide17 Sep 2026US 2026/0276881 A1Centre National De La Recherche Scientifique
- A method and apparatus for collecting, transporting and distributing energy27 Aug 2026US 2026/0254407 A1ATOA Scientific Technologies Pvt. Ltd
- Lc connector for hollow-core optical fibers23 Apr 2026US 2026/0110846 A1Samba Photonics Lab Inc.
- Hollow-core fiber and optical transmission system5 Mar 2026US 2026/0063834 A1Huawei Technologies Co., Ltd.
- Hollow-core optical fibers, fiber optic cable assemblies with same, and methods of making same5 Feb 2026US 2026/0036738 A1Corning Research & Development Corporation
Most cited
By later US patents
- Electromagnetic mode conversion in photonic crystal multimode waveguides264US 6,728,439 B2OmniGuide Communications · 2004
- Electromagnetic mode conversion in photonic crystal multimode waveguides248US 6,563,981 B2OmniGuide Communications · 2003
- Thermal sensing fiber devices242US 7,567,740 B2Massachusetts Institute of Technology · 2009
- Thermal sensing fiber devices228US 7,805,029 B2Massachusetts Institute of Technology · 2010
- Low-loss photonic crystal waveguide having large core radius69US 6,625,364 B2OmniGuide Communications · 2003