G01M 11/3109
Reflectometers detecting the back-scattered light in the time-domain
Official title: {Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR}
G01M11/3109 (Reflectometers detecting the back-scattered light in the time-domain) appears on 804 US grants and 720 published applications in this corpus.
Search patents in G01M- Granted patents
- 804
- Published applications
- 720
- Assignees
- 312
- Inventors
- 1,358
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 11 | 0 |
| 1991 | 18 | 0 |
| 1992 | 13 | 0 |
| 1993 | 6 | 0 |
| 1994 | 9 | 0 |
| 1995 | 15 | 0 |
| 1996 | 17 | 0 |
| 1997 | 10 | 0 |
| 1998 | 11 | 0 |
| 1999 | 12 | 0 |
| 2000 | 10 | 0 |
| 2001 | 8 | 2 |
| 2002 | 9 | 16 |
| 2003 | 19 | 12 |
| 2004 | 13 | 14 |
| 2005 | 13 | 20 |
| 2006 | 23 | 12 |
| 2007 | 11 | 10 |
| 2008 | 12 | 24 |
| 2009 | 10 | 17 |
| 2010 | 15 | 17 |
| 2011 | 12 | 29 |
| 2012 | 20 | 15 |
| 2013 | 22 | 26 |
| 2014 | 23 | 39 |
| 2015 | 33 | 31 |
| 2016 | 32 | 37 |
| 2017 | 39 | 30 |
| 2018 | 31 | 33 |
| 2019 | 36 | 34 |
| 2020 | 36 | 33 |
| 2021 | 39 | 57 |
| 2022 | 48 | 50 |
| 2023 | 43 | 52 |
| 2024 | 36 | 38 |
| 2025 | 32 | 39 |
| 2026 | 30 | 33 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01M 11/3145Details of the optoelectronics or data analysis313
- G01M 11/3136For testing of multiple fibers172
- G01M 11/3127Using multiple or wavelength variable input source155
- G01M 11/3154Details of the opto-mechanical connection128
- G01M 11/3118Using coded light-pulse sequences72
- G01M 11/3163By measuring dispersion30
Recent patents
- Crosstalk measuring method, and crosstalk measuring device6 Oct 2026US 12,754,100 B2Fujikura Ltd.
- Optical time domain reflectometer (OTDR)-based fiber monitoring optimization6 Oct 2026US 12,756,459 B2Viavi Solutions Inc.
- Apparatus and methods for monitoring optical fiber system integrity15 Sep 2026US 12,736,438 B2OneSubsea IP UK Limited
- Circulator cable for use with a pluggable optical time domain reflectometer1 Sep 2026US 12,723,946 B2II-Vi Delaware, Inc.
- Adjusting the power level of a visible light source based on a characterization of an optical fiber under test25 Aug 2026US 12,716,810 B2EXFO Inc.
- Methods And Devices For Denoising Optical Time-Domain Reflectometry Signals24 Sep 2026US 2026/0291605 A1
- Optical time domain reflectometry for hollow core optical fibres3 Sep 2026US 2026/0259105 A1University of Southampton
- Optical fiber group delay characteristics test equipment and methods3 Sep 2026US 2026/0259106 A1NTT, Inc.
- A fibre optic cable monitoring method and system3 Sep 2026US 2026/0259107 A1Fiber Sense Limited
- High speed bidirectional test of dual-fiber link3 Sep 2026US 2026/0261338 A1Viavi Solutions Inc.
Most cited
By later US patents
- Broadband light source system and method and light source combiner281US 6,570,659 B2LightLab Imaging, Inc. · 2003
- Retractable optical fiber assembly260US 6,915,058 B2Corning Cable Systems LLC · 2005
- De-embedment of optical component characteristics and calibration of optical receivers using rayleigh backscatter197US 6,947,147 B2Agilent Technologies, Inc. · 2005
- Optical time domain reflectometry (OTDR) trace analysis in PON systems169US 8,724,102 B2Telefonaktiebolaget LM Ericsson (publ) · 2014
- Signal sampling system125US 4,438,404 ATektronix, Inc. · 1984