H04J 14/0224
Irregular wavelength spacing
Official title: {Irregular wavelength spacing, e.g. to accommodate interference to all wavelengths}
H04J14/0224 (Irregular wavelength spacing) appears on 146 US grants and 123 published applications in this corpus.
Search patents in H04J- Granted patents
- 146
- Published applications
- 123
- Assignees
- 62
- Inventors
- 316
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 3 |
| 2002 | 7 | 5 |
| 2003 | 3 | 4 |
| 2004 | 2 | 4 |
| 2005 | 4 | 3 |
| 2006 | 5 | 5 |
| 2007 | 3 | 4 |
| 2008 | 3 | 1 |
| 2009 | 2 | 2 |
| 2010 | 3 | 4 |
| 2011 | 1 | 0 |
| 2012 | 3 | 11 |
| 2013 | 1 | 4 |
| 2014 | 10 | 13 |
| 2015 | 8 | 8 |
| 2016 | 14 | 6 |
| 2017 | 6 | 8 |
| 2018 | 3 | 3 |
| 2019 | 8 | 9 |
| 2020 | 7 | 3 |
| 2021 | 6 | 4 |
| 2022 | 5 | 3 |
| 2023 | 4 | 10 |
| 2024 | 6 | 3 |
| 2025 | 2 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Photonic integrated circuit for high-wavelength-channel-count wavelength-division-multiplexed systems10 Feb 2026US 12,549,259 B2Quintessent Inc.
- Wavelength multiplexing optical transmission system and wavelength multiplexing optical transmitter13 Jan 2026US 12,526,067 B2LumentumRadiant GmbH
- Optical frequency spectral optimization in dense wavelength division multiplexing (DWDM) flex grid systems15 Jul 2025US 12,362,826 B2Level 3 Communications, LLC
- Metastructured photonic devices for multiplexing or demultiplexing of optical signals25 Mar 2025US 12,261,685 B2X Development LLC
- Wavelength division multiplexing structure24 Dec 2024US 12,177,002 B2China Mobile Communication Co., Ltd Research Institute
- Optical frequency spectral optimization in dense wavelength division multiplexing (dwdm) flex grid system13 Nov 2025US 2025/0350359 A1Level 3 Communications, LLC
- Optical transmitter, optical transceiver using optical transmitter, and wavelength control method6 Feb 2025US 2025/0047390 A1Fujitsu Limited
- Optical communication system and first node9 Jan 2025US 2025/0015893 A1
- Optical frequency spectral optimization in dense wavelength division multiplexing (dwdm) flex grid systems11 Jul 2024US 2024/0235677 A1Level 3 Communications, LLC
- Wavelength multiplexing optical transmission system and wavelength multiplexing optical transmitter4 Apr 2024US 2024/0113797 A1Lumentum Japan, Inc.
Most cited
By later US patents
- Method and apparatus for using multicarrier interferometry to enhance optical fiber communications150US 7,076,168 B1Aquity, LLC · 2006
- Dense wavelength division multiplexer and demultiplexer devices106US 5,748,350 AE-Tek Dynamics, Inc. · 1998
- Multichannel optical fiber communications89US 5,633,741 ALucent Technologies Inc. · 1997
- Frequency agile transmitter and receiver architecture for DWDM systems65US 7,209,664 B1Nortel Networks Limited · 2007
- Wavelength division multiplexed optical communication system architectures65US 8,655,190 B2Infinera Corporation · 2014