H04B 10/25073
Using spectral equalisation
Official title: {using spectral equalisation, e.g. spectral filtering}
H04B10/25073 (Using spectral equalisation) appears on 193 US grants and 178 published applications in this corpus.
Search patents in H04B- Granted patents
- 193
- Published applications
- 178
- Assignees
- 103
- Inventors
- 422
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 1 |
| 2002 | 6 | 15 |
| 2003 | 11 | 10 |
| 2004 | 10 | 10 |
| 2005 | 6 | 7 |
| 2006 | 11 | 4 |
| 2007 | 9 | 5 |
| 2008 | 1 | 0 |
| 2009 | 1 | 3 |
| 2010 | 0 | 2 |
| 2011 | 3 | 2 |
| 2012 | 1 | 4 |
| 2013 | 2 | 3 |
| 2014 | 4 | 5 |
| 2015 | 9 | 5 |
| 2016 | 6 | 5 |
| 2017 | 6 | 8 |
| 2018 | 9 | 6 |
| 2019 | 12 | 9 |
| 2020 | 15 | 13 |
| 2021 | 13 | 17 |
| 2022 | 12 | 9 |
| 2023 | 10 | 12 |
| 2024 | 6 | 8 |
| 2025 | 11 | 7 |
| 2026 | 2 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for equalization in an access network of passive optical network type, computer program product, optical line termination and optical network unit corresponding thereto17 Mar 2026US 12,580,653 B2Orange
- Apparatus and methods for mitigating multipath interference in fiber transmission system13 Jan 2026US 12,526,056 B2Huawei Technologies Co., Ltd.
- Tunable optical filter in coherent optical transmitters4 Nov 2025US 12,463,727 B2Ciena Corporation
- Flexible baud rate14 Oct 2025US 12,445,206 B2
- Methods, devices, apparatuses, and medium for optical communication30 Sep 2025US 12,431,970 B2Nokia Solutions and Networks Oy
- Apparatus and method for equalizer training in a coherent receiver27 Aug 2026US 2026/0254680 A1Nokia Solutions and Networks Oy
- Calculation device, calculation method and program13 Aug 2026US 2026/0238344 A1NTT, Inc.
- Dynamic Spectral Equalization in Ladder Protected Optical Networks16 Jul 2026US 2026/0205206 A1Ciena Corporation
- Integrated Prism-Chirped Volume Bragg Grating For Dispersion Compensation30 Apr 2026US 2026/0118565 A1Google Inc.
- Variable optical attenuator array, and power adjustment device23 Apr 2026US 2026/0110843 A1Huawei Technologies Co., Ltd.
Most cited
By later US patents
- Optical transmission system equalizer176US 5,225,922 AAT&T Bell Laboratories · 1993
- Method and apparatus for dynamic equalization in wavelength division multiplexing92US 6,782,205 B2Silicon Light Machines Corporation · 2004
- Optical signal equalizer for wavelength division multiplexed optical fiber systems66US 5,276,543 AGTE Laboratories Incorporated · 1994
- Optical nyquist superchannel generation using microwave low-pass filtering and optical equalization50US 9,270,379 B2NEC Laboratories America, Inc. · 2016
- Channel power equalizer for a wavelength division multiplexed system39US 6,212,315 B1Lucent Technologies Inc. · 2001