H01S 2301/04
Gain spectral shaping, flattening
H01S2301/04 (Gain spectral shaping, flattening) appears on 594 US grants and 496 published applications in this corpus.
Search patents in H01S- Granted patents
- 594
- Published applications
- 496
- Assignees
- 247
- Inventors
- 1,059
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 11 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 11 | 0 |
| 1998 | 18 | 0 |
| 1999 | 14 | 0 |
| 2000 | 26 | 0 |
| 2001 | 20 | 10 |
| 2002 | 60 | 66 |
| 2003 | 45 | 54 |
| 2004 | 32 | 29 |
| 2005 | 32 | 28 |
| 2006 | 32 | 19 |
| 2007 | 23 | 35 |
| 2008 | 25 | 23 |
| 2009 | 23 | 18 |
| 2010 | 16 | 11 |
| 2011 | 20 | 17 |
| 2012 | 6 | 6 |
| 2013 | 9 | 7 |
| 2014 | 20 | 13 |
| 2015 | 8 | 14 |
| 2016 | 12 | 13 |
| 2017 | 15 | 10 |
| 2018 | 9 | 8 |
| 2019 | 7 | 10 |
| 2020 | 7 | 9 |
| 2021 | 7 | 13 |
| 2022 | 14 | 21 |
| 2023 | 11 | 22 |
| 2024 | 11 | 22 |
| 2025 | 11 | 8 |
| 2026 | 17 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Optical signal amplification18 Aug 2026US 12,712,330 B21FINITY Inc.
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- Systems and methods to reduce the power consumption of an optical fiber amplifier11 Aug 2026US 12,706,432 B2Huawei Technologies Co., Ltd.
- Fiber amplifier2 Jun 2026US 12,646,901 B2Huawei Technologies Co., Ltd.
- Optical Amplifier Failure Prediction Using Machine Learning23 Jul 2026US 2026/0213484 A1Ciena Corporation
- Raman Gain Measurements in Dynamically Controlled Optical Line Systems16 Jul 2026US 2026/0205194 A1Ciena Corporation
- Gain equalization in c+l erbium-doped fiber amplifiers9 Jul 2026US 2026/0196795 A1Subcom, LLC
- Multi-Core Fiber Gain Flattening Filter and Shape Correcting Filter9 Jul 2026US 2026/0196796 A1Subcom, LLC
- Quad amplifiers in single qsfp form package4 Jun 2026US 2026/0155618 A1II-VI Photonics, Inc.
Most cited
By later US patents
- Quantum dot Laser374US 5,260,957 AThe Charles Stark Draper Laboratory, Inc. · 1993
- Optical transmission system equalizer176US 5,225,922 AAT&T Bell Laboratories · 1993
- Optical amplifier having first and second stages and an attenuator controlled based on the gains of the first and second stages147US 6,049,413 ACiena Corporation · 2000
- Multi-stage optical fiber amplifier131US 5,050,949 AAT&T Bell Laboratories · 1991
- Raman amplifier, optical repeater, and raman amplification method114US 6,292,288 B1Furukawa Electric Co., Ltd. · 2001