H01S 5/1215
Multiplicity of periods
Official title: {Multiplicity of periods}
H01S5/1215 (Multiplicity of periods) appears on 275 US grants and 234 published applications in this corpus.
Search patents in H01S- Granted patents
- 275
- Published applications
- 234
- Assignees
- 147
- Inventors
- 561
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 10 | 0 |
| 1996 | 6 | 0 |
| 1997 | 10 | 0 |
| 1998 | 5 | 0 |
| 1999 | 11 | 0 |
| 2000 | 12 | 0 |
| 2001 | 8 | 3 |
| 2002 | 6 | 14 |
| 2003 | 7 | 17 |
| 2004 | 12 | 17 |
| 2005 | 13 | 7 |
| 2006 | 10 | 6 |
| 2007 | 2 | 6 |
| 2008 | 5 | 9 |
| 2009 | 7 | 7 |
| 2010 | 6 | 8 |
| 2011 | 5 | 7 |
| 2012 | 5 | 8 |
| 2013 | 8 | 4 |
| 2014 | 6 | 8 |
| 2015 | 9 | 8 |
| 2016 | 9 | 6 |
| 2017 | 7 | 13 |
| 2018 | 11 | 16 |
| 2019 | 13 | 9 |
| 2020 | 9 | 12 |
| 2021 | 11 | 9 |
| 2022 | 5 | 15 |
| 2023 | 8 | 6 |
| 2024 | 9 | 7 |
| 2025 | 4 | 6 |
| 2026 | 1 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Semiconductor laser with metal pull-back DBR grating14 Apr 2026US 12,603,480 B2MACOM Technology Solutions Holdings, Inc.
- Tunable semiconductor laser device1 Jul 2025US 12,348,003 B2II-Vi Delaware, Inc.
- Surface emitting laser with hybrid grating structure6 May 2025US 12,294,198 B2TrueLight Corporation
- Quantum cascade laser4 Mar 2025US 12,244,121 B2Hamamatsu Photonics K.K.
- Semiconductor optical amplifier integrated laser4 Feb 2025US 12,218,480 B2Lumentum Japan, Inc.
- Two-dimensional periodically index-coupled fabry perot laser ("2d pic-fl")27 Aug 2026US 2026/0254200 A1
- Two-dimensional grating surface-emitting laser ("2d-grsel")20 Aug 2026US 2026/0246230 A1
- Laser coupling module9 Jul 2026US 2026/0196804 A1Hon Hai Precision Industry Co., Ltd.
- Multi-wavelength laser19 Mar 2026US 2026/0081400 A1Lumentum Operations LLC
- Surface emitting lasing device29 Jan 2026US 2026/0031598 A1Imec Vzw
Most cited
By later US patents
- Method and apparatus for performing optical frequency domain reflectometry488US 6,160,826 AMassachusetts Institute of Technology · 2000
- Method and apparatus for performing optical measurements using a rapidly frequency-tuned laser478US 5,956,355 AMassachusetts Institute of Technology · 1999
- Cylindrical diffraction grating couplers and distributed feedback resonators for guided wave devices185US 4,743,083 A1988
- Multi-section tunable laser with differing multi-element mirrors185US 4,896,325 AThe Regents of the University of California · 1990
- Multiwavelength mode-locked dense wavelength division multiplexed optical communication systems132US 6,014,237 ASarnoff Corporation · 2000