H04B 10/612
For optical signals modulated with a format different from binary or higher-order
Official title: {for optical signals modulated with a format different from binary or higher-order PSK [X-PSK], e.g. QAM, DPSK, FSK, MSK, ASK}
H04B10/612 (For optical signals modulated with a format different from binary or higher-order) appears on 179 US grants and 184 published applications in this corpus.
Search patents in H04B- Granted patents
- 179
- Published applications
- 184
- Assignees
- 87
- Inventors
- 347
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 1 |
| 2012 | 2 | 4 |
| 2013 | 1 | 6 |
| 2014 | 7 | 7 |
| 2015 | 5 | 9 |
| 2016 | 11 | 17 |
| 2017 | 16 | 8 |
| 2018 | 14 | 17 |
| 2019 | 20 | 21 |
| 2020 | 23 | 20 |
| 2021 | 20 | 16 |
| 2022 | 12 | 18 |
| 2023 | 19 | 12 |
| 2024 | 13 | 10 |
| 2025 | 10 | 10 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Receiving apparatus and receiving method24 Mar 2026US 12,587,283 B2NTT, Inc.
- Coherent optical receiver17 Feb 2026US 12,556,286 B2Mitsubishi Electric Corporation
- Transmission method and reception method for optical communication, and corresponding device6 Jan 2026US 12,519,546 B2Huawei Technologies Co., Ltd.
- Optical communication system for passive optical networks and high data rate communication14 Oct 2025US 12,445,198 B2King Fahd University of Petroleum and Minerals
- Flexible baud rate14 Oct 2025US 12,445,206 B2
- Optical receiver and signal processing method17 Sep 2026US 2026/0280719 A1NTT, Inc.
- Data Processing Method and Data Processing Apparatus2 Jul 2026US 2026/0189309 A1Huawei Technologies Co., Ltd.
- Coherent optical receiving method and receiver16 Apr 2026US 2026/0106673 A1UIF (University Industry Foundation), Yonsei University
- Transmission method and reception method for optical communication, and corresponding device26 Mar 2026US 2026/0088906 A1Huawei Technologies Co., Ltd.
- Flexible baud rate8 Jan 2026US 2026/0012265 A1Acacia Technology, Inc.
Most cited
By later US patents
- System and method for high speed satellite-based free-space laser communications using automatic gain control50US 10,243,653 B2Schafer Aerospace, Inc. · 2019
- Optical homodyne DPSK receiver with optical amplifier44US 5,181,136 AUniversity of Ottawa · 1993
- Systems and methods for demodulation of PSK modulated optical signals24US 10,225,020 B2Raytheon Company · 2019
- Methods and apparatus for predicting and monitoring performance of a coherent optical transceiver21US 10,211,917 B1Juniper Networks, Inc. · 2019
- Homodyne optical coherent receiver for digital optical signals19US 4,732,447 AStc PLC · 1988