G02B 6/4208
Using non-reciprocal elements or birefringent plates, i.e. quasi-isolators
Official title: {using non-reciprocal elements or birefringent plates, i.e. quasi-isolators (optical isolators per se G02F1/093, G02F1/0955)}
G02B6/4208 (Using non-reciprocal elements or birefringent plates, i.e. quasi-isolators) appears on 390 US grants and 330 published applications in this corpus.
Search patents in G02B- Granted patents
- 390
- Published applications
- 330
- Assignees
- 198
- Inventors
- 852
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 15 | 0 |
| 1992 | 7 | 0 |
| 1993 | 11 | 0 |
| 1994 | 11 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 13 | 0 |
| 1998 | 9 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 0 |
| 2002 | 6 | 21 |
| 2003 | 4 | 20 |
| 2004 | 14 | 13 |
| 2005 | 15 | 20 |
| 2006 | 14 | 5 |
| 2007 | 9 | 4 |
| 2008 | 8 | 4 |
| 2009 | 6 | 5 |
| 2010 | 3 | 6 |
| 2011 | 3 | 3 |
| 2012 | 2 | 13 |
| 2013 | 4 | 13 |
| 2014 | 9 | 8 |
| 2015 | 11 | 10 |
| 2016 | 14 | 27 |
| 2017 | 32 | 36 |
| 2018 | 29 | 22 |
| 2019 | 17 | 25 |
| 2020 | 21 | 17 |
| 2021 | 17 | 13 |
| 2022 | 11 | 12 |
| 2023 | 6 | 10 |
| 2024 | 8 | 8 |
| 2025 | 11 | 9 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Focal polarization beam displacer30 Jun 2026US 12,669,637 B2Cisco Technology, Inc.
- Photonics integrated circuit optical amplifier10 Mar 2026US 12,571,970 B2II-VI Photonics, Inc.
- High gyrotropy photonic isolators directly on substrate24 Feb 2026US 12,560,832 B2Regents of the University of Minnesota
- System and method for directionally-dependent polarization modification3 Feb 2026US 12,541,122 B2Raytheon Company
- LIDAR sensor system including particular optic design20 Jan 2026US 12,529,764 B2Aurora Operations, Inc.
- Semiconductor device27 Aug 2026US 2026/0251863 A1Panelsemi Corporation
- Optical communication device14 May 2026US 2026/0133385 A1FUJIFILM Corporation
- LIDAR Sensor System Including Particular Optic Design30 Apr 2026US 2026/0118484 A1Aurora Operations, Inc.
- Interconnect module for high-speed data transmission30 Apr 2026US 2026/0121766 A1Samtec, Inc.
- Compact Laser Assembly For Reverse On-PCB Direct-Coupling12 Mar 2026US 2026/0074483 A1Ciena Corporation
Most cited
By later US patents
- Optical fiber amplifier with flattened gain94US 5,239,607 ABell Communications Research, Inc. · 1993
- Polarization independent optical isolator93US 5,033,830 AAT&T Bell Laboratories · 1991
- Optical device88US 4,548,478 AFujitsu Limited · 1985
- Optical parts fixing apparatus and method of manufacturing the same80US 5,671,315 AFujitsu Limited · 1997
- Bidirectional optical module and optical time domain reflectometer77US 7,853,104 B2Optohub Co., Ltd · 2010