G02B 6/2938
For multiplexing or demultiplexing, i.e. combining or separating wavelengths
Official title: {for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM}
G02B6/2938 (For multiplexing or demultiplexing, i.e. combining or separating wavelengths) appears on 1,812 US grants and 1,538 published applications in this corpus.
Search patents in G02B- Granted patents
- 1,812
- Published applications
- 1,538
- Assignees
- 718
- Inventors
- 3,308
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 8 | 0 |
| 1982 | 6 | 0 |
| 1983 | 1 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 9 | 0 |
| 1987 | 20 | 0 |
| 1988 | 21 | 0 |
| 1989 | 8 | 0 |
| 1990 | 10 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 15 | 0 |
| 1996 | 12 | 0 |
| 1997 | 16 | 0 |
| 1998 | 38 | 0 |
| 1999 | 43 | 0 |
| 2000 | 55 | 0 |
| 2001 | 99 | 31 |
| 2002 | 98 | 165 |
| 2003 | 121 | 169 |
| 2004 | 141 | 110 |
| 2005 | 90 | 67 |
| 2006 | 79 | 56 |
| 2007 | 74 | 46 |
| 2008 | 63 | 34 |
| 2009 | 23 | 29 |
| 2010 | 31 | 17 |
| 2011 | 18 | 22 |
| 2012 | 18 | 21 |
| 2013 | 14 | 26 |
| 2014 | 24 | 32 |
| 2015 | 41 | 50 |
| 2016 | 59 | 85 |
| 2017 | 74 | 89 |
| 2018 | 71 | 76 |
| 2019 | 66 | 62 |
| 2020 | 74 | 60 |
| 2021 | 58 | 42 |
| 2022 | 45 | 52 |
| 2023 | 37 | 60 |
| 2024 | 43 | 43 |
| 2025 | 35 | 48 |
| 2026 | 20 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Technologies for optical demultiplexing with backwards compatibility6 Oct 2026US 12,754,364 B2Intel Corporation
- Contradirectional-filter architecture having low back-reflection15 Sep 2026US 12,736,752 B2Quintessent Inc.
- High-isolation light source filling device and method in wavelength Division multiplexing system25 Aug 2026US 12,719,577 B2Accelink Technologies Co., Ltd.
- Process variation-tolerant cascaded tapered optical ring resonators18 Aug 2026US 12,710,596 B2Xilinx, Inc.
- Wavelength agile multiplexing11 Aug 2026US 12,704,682 B2Apple Inc.
- Adaptive thermal control for micro-ring modulators in photonic links8 Oct 2026US 2026/0309943 A1Samsung Electronics Co., Ltd.
- Laser system with active wavelength control1 Oct 2026US 2026/0302716 A1Lightmatter, Inc.
- Light source apparatus17 Sep 2026US 2026/0277010 A1Sony Group Corporation
- Light detection and ranging system and mobile device27 Aug 2026US 2026/0251764 A1Lightic Technologies Hk Limited
- Optical network component configuration27 Aug 2026US 2026/0254550 A1Telefonaktiebolaget LM Ericsson (publ)
Most cited
By later US patents
- High reflection isolation optical devices and the method for making the same357US 7,289,733 B1Alliance Fiber Optic Products, Inc. · 2007
- Multi-plane optical apparatus310US 7,573,640 B2Mirage Innovations Ltd. · 2009
- Optical wavelength division multiplexing/demultiplexing system228US 4,773,063 AUniversity of Delaware · 1988
- Planar holographic optical device for beam expansion and display228US 6,169,613 AYeda Research & Devel Co., Ltd. · 2001
- Holographic optical devices for the transmission of optical signals of a plurality of channels222US 5,682,255 AYeda Research and Development Co. Ltd. · 1997