G02F 1/3548
Quasi phase matching [qpm]
Official title: {Quasi phase matching [QPM], e.g. using a periodic domain inverted structure}
G02F1/3548 (Quasi phase matching [qpm]) appears on 230 US grants and 165 published applications in this corpus.
Search patents in G02F- Granted patents
- 230
- Published applications
- 165
- Assignees
- 152
- Inventors
- 548
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 13 | 0 |
| 1999 | 9 | 0 |
| 2000 | 5 | 0 |
| 2001 | 13 | 0 |
| 2002 | 3 | 5 |
| 2003 | 1 | 3 |
| 2004 | 11 | 6 |
| 2005 | 3 | 6 |
| 2006 | 6 | 4 |
| 2007 | 3 | 6 |
| 2008 | 6 | 8 |
| 2009 | 6 | 5 |
| 2010 | 7 | 10 |
| 2011 | 5 | 12 |
| 2012 | 10 | 11 |
| 2013 | 10 | 5 |
| 2014 | 7 | 4 |
| 2015 | 5 | 6 |
| 2016 | 5 | 6 |
| 2017 | 8 | 8 |
| 2018 | 7 | 4 |
| 2019 | 3 | 2 |
| 2020 | 10 | 9 |
| 2021 | 4 | 4 |
| 2022 | 4 | 9 |
| 2023 | 9 | 7 |
| 2024 | 6 | 12 |
| 2025 | 6 | 9 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Differential frequency generation29 Sep 2026US 12,749,866 B2The United States of America as represented by the Secretary of the Air Force
- System and methods of visible light swept-source optical coherence tomography1 Sep 2026US 12,724,319 B2Northwestern University
- Third-harmonic frequency generator and generation method25 Aug 2026US 12,717,209 B2Cornell University
- Wavelength conversion device4 Aug 2026US 12,699,304 B2Korea Research Institute of Standards and Science
- Low-threshold supercontinuum generation in bulk dielectrics and semiconductors5 May 2026US 12,619,125 B2Ipg Photonics Corporation
- System and method for generating entangled photons13 Aug 2026US 2026/0235922 A1Ramot at Tel-Aviv University Ltd.
- Tunable nonlinear photonic structure16 Apr 2026US 2026/0104622 A1City University of Hong Kong
- Manufacturing Method for Wavelength Conversion Elements26 Mar 2026US 2026/0086421 A1NTT, Inc.
- Method and system for construction of crystals for frequency conversion5 Feb 2026US 2026/0036869 A1KLA Corporation
- Nonlinear optical mg-iv-v 2 crystals, methods of making the same and devices comprising the same28 Aug 2025US 2025/0271727 A1The Penn State Research Foundation
Most cited
By later US patents
- Apparatus and method for the generation of high-power femtosecond pulses from a fiber amplifier193US 6,014,249 AImra America, Inc. · 2000
- Apparatus and method for the generation of high-power femtosecond pulses from a fiber amplifier173US 5,880,877 AImra America, Inc. · 1999
- Quasi-phase-matched parametric chirped pulse amplification systems150US 6,181,463 B2Imra America, Inc. · 2001
- Quasi-phase-matched parametric chirped pulse amplification systems147US 6,208,458 B1Imra America, Inc. · 2001
- Composite optical and electro-optical devices135US 5,846,638 AOnyx Optics, Inc. · 1998