H04B 10/64
Heterodyne , i.e. coherent receivers where, after the opto-electronic conversion, an electrical
Official title: Heterodyne {, i.e. coherent receivers where, after the opto-electronic conversion, an electrical signal at an intermediate frequency [IF] is obtained}
H04B10/64 (Heterodyne , i.e. coherent receivers where, after the opto-electronic conversion, an electrical) appears on 287 US grants and 209 published applications in this corpus.
Search patents in H04B- Granted patents
- 287
- Published applications
- 209
- Assignees
- 142
- Inventors
- 480
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 11 | 0 |
| 1990 | 11 | 0 |
| 1991 | 10 | 0 |
| 1992 | 15 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 9 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 7 |
| 2003 | 7 | 4 |
| 2004 | 3 | 7 |
| 2005 | 3 | 8 |
| 2006 | 2 | 3 |
| 2007 | 8 | 5 |
| 2008 | 7 | 3 |
| 2009 | 5 | 3 |
| 2010 | 1 | 6 |
| 2011 | 2 | 3 |
| 2012 | 3 | 7 |
| 2013 | 6 | 2 |
| 2014 | 6 | 5 |
| 2015 | 4 | 4 |
| 2016 | 6 | 5 |
| 2017 | 15 | 11 |
| 2018 | 9 | 14 |
| 2019 | 16 | 18 |
| 2020 | 15 | 20 |
| 2021 | 15 | 18 |
| 2022 | 14 | 13 |
| 2023 | 17 | 15 |
| 2024 | 10 | 8 |
| 2025 | 6 | 7 |
| 2026 | 7 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus and method for polarization control in coherent optical reception system29 Sep 2026US 12,750,141 B2Electronics and Telecommunications Research Institute
- Electronic demultiplexing for dual-polarization (DP) intensity-modulated direct detection (IMDD) optical communication systems7 Jul 2026US 12,676,679 B2Aloe Semiconductor Inc.
- Real-time vector analysis method and device for detecting optical signal with bandwidth greater than 1 THz23 Jun 2026US 12,665,677 B2Huazhong University of Science and Technology
- To network synchronization16 Jun 2026US 12,659,046 B2British Telecommunications Public Ltd.Co.
- Coherent detection method and apparatus, and optical transmission system28 Apr 2026US 12,615,093 B2Zte Corporation
- Signal Transmission Method, Communication System, and Related Device11 Jun 2026US 2026/0163642 A1Huawei Technologies Co., Ltd.
- Phased-Array Radio Frequency Receiver21 May 2026US 2026/0142726 A1Phase Sensitive Innovations, Inc.
- Optical link with vcsel wavelength modulation30 Apr 2026US 2026/0121377 A1Volantis Semiconductor, Inc.
- Optical links with degree of freedom vcsel modulation on a photonic wafer-scale interposer30 Apr 2026US 2026/0121378 A1Volantis Semiconductor, Inc.
- Signal transmission method and apparatus30 Apr 2026US 2026/0121747 A1
Most cited
By later US patents
- Optical heterodyne receiver for fiber optic communications system76US 5,452,118 ASpire Corporation · 1995
- System and method for optical heterodyne detection of an optical signal including optical pre-selection that is adjusted to accurately track a local oscillator signal72US 7,027,743 B1Agilent Technologies, Inc. · 2006
- Frequency agile transmitter and receiver architecture for DWDM systems65US 7,209,664 B1Nortel Networks Limited · 2007
- Optical communications using multiplexed single sideband transmission and heterodyne detection62US 7,447,436 B2Forster Energy LLC · 2008
- Coherent subcarrier multiplexed optical communication system61US 5,134,509 AGTE Laboratories Incorporated · 1992