Optical Frequency Comb Patent Landscape 2026
Optical Frequency Comb Patent Landscape in 2026
The optical frequency comb field spans 1,299 patent families and has reached a mature plateau, with annual volume easing from its 2021 peak while the multi-year window remains up. Activity is moderately concentrated among a tight cluster of academic institutions, national labs, and specialist commercial players, with optical control and modulation as the dominant technical axis.
A moderately concentrated field led by NTT, Caltech, and Honeywell
Nippon Telegraph & Telephone Corp leads with 53 patent families, followed closely by California Institute of Technology at 52 and Honeywell International at 51 — a near three-way tie at the top that signals competitive parity among the frontrunners rather than a single dominant incumbent.
The top five applicants — NTT, Caltech, Honeywell, the National Institute of Information and Communications Technology, and the Regents of the University of California — together account for 17% of the combined output of the hundred largest filers. That share is moderate, indicating room for mid-tier players and new entrants to stake meaningful positions.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | NIPPON TELEGRAPH & TELEPHONE CORP | 53 | |
| 2 | California Institute of Technology | 52 | |
| 3 | Honeywell International Inc | 51 | |
| 4 | NAT INST OF INFORMATION & COMM TECH | 44 | |
| 5 | Regents of the University of California | 44 | |
| 6 | OEwaves Inc | 32 | |
| 7 | Ecole Polytechnique Federale de Lausanne (EPFL) | 30 | |
| 8 | The General Hospital Corporation | 27 | |
| 9 | University of Tokushima | 27 | |
| 10 | The Government of the United States of America | 26 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Optocomb Inc | 26 | |
| 12 | IMRA America Inc | 26 | |
| 13 | THE JAPAN SCI & TECH AGENCY | 25 | |
| 14 | Sumitomo Osaka Cement Co Ltd | 21 | |
| 15 | University College London | 20 | |
| 16 | DeepSight Technology Inc | 19 | |
| 17 | Cable Television Laboratories Inc | 18 | |
| 18 | Lightmatter Inc | 18 | |
| 19 | Tianjin University | 18 | |
| 20 | Raytheon Company | 17 |
The co-dominance of university and national-lab entities alongside commercial players (Honeywell, OEwaves, IMRA America) reflects a field still bridging fundamental research and product development. Commercial applicants that have built large portfolios — particularly Honeywell with a sharply accelerating trajectory — are beginning to pull away from the academic tier.
Filing counts for 2024–2026 are materially under-counted due to the standard 18-month patent publication lag; recent-period figures should be treated as lower bounds. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity plateaued after a 2021 peak; optical modulation dominates the technology mix
The annual filing trend and the IPC technology breakdown together reveal a field that surged to a peak and has since stabilised, with a sharply defined core technology and a long tail of adjacent application branches.
Annual filing trend
Filings climbed from 94 in 2017 to a 2021 peak of 197, then settled near 175 in 2022–2023. The 2024 and 2025 figures are under-counted due to publication lag and should not be read as further decline. The multi-year window shows a net 5% growth over the prior comparable period, consistent with a mature plateau rather than contraction.
↗ Hover for values · click a bar to ask EurekaTechnology composition
G02F (optical control and modulation) is by far the largest branch, reflecting the centrality of electro-optic and nonlinear modulation to comb generation. H01S (lasers and stimulated emission) and G02B (optical elements and systems) form a secondary core. Application-oriented branches — H04B (transmission), G01N (material analysis), G01J (radiation measurement) — appear at significantly lower share, indicating that deployment in communications and sensing remains under-patented relative to the underlying photonic device layer.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Optical Frequency Comb Generator Control Device
A purpose of the present invention is to provide an optical frequency comb generator control device capable of obtaining a stable output by performing a control of a resonator length or a light source frequency such that a control point is located at a position where an optical frequency comb is generated most widely, even in an optical frequency comb… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Opto-electronic oscillator having a positive feedb… | 267 |
| 2 | Laser based frequency standards and their applicat… | 184 |
| 3 | Opto-electronic devices and systems based on brill… | 174 |
| 4 | Photonic processing systems and methods | 153 |
| 5 | Methods and devices based on brillouin selective s… | 139 |
| 6 | Comb generating optical cavity that includes an op… | 131 |
| 7 | Apparatus and methods for fluorescence imaging usi… | 117 |
| 8 | Active mode-locked lasers and other photonic devic… | 117 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
Four structural dimensions — maturity stage, concentration, collaborative ecosystem, and geographic spread — each carry distinct implications for where new entrants or incumbents should focus effort.
Mature plateau: device-layer innovation is dense, application layers are open
Annual filings have plateaued near the 2021 peak, placing the field in a maturity stage. Core comb-generation and modulation IP is crowded; incremental improvements in those areas face a high prior-art bar. The more accessible innovation frontier lies in translating comb technology into specific sensing, metrology, and communications applications, where patent density is still relatively low.
Lifecycle: MatureModerate concentration with a competitive three-way lead
With the top three applicants separated by only two patent families (53, 52, 51), no single entity has established an unassailable portfolio lead. The top-five share of 17% among the hundred largest filers means the remainder of the ranking is fragmented, leaving meaningful space for focused challengers. Honeywell’s sharply accelerating momentum (+140% recent vs. prior period) is the clearest signal of an incumbent repositioning for commercial leadership.
Competitive parityJapan’s NICT–Tokushima axis is the most active co-development network
The most frequent co-filing pair is the National Institute of Information and Communications Technology and the University of Tokushima, with 9 jointly filed patent families. NTT is the ecosystem hub with co-filings alongside Osaka University (4 families), Tohoku University (3), and Tokyo Denki University (2). EPFL and Purdue Research Foundation form a notable trans-Atlantic pairing with 3 joint families. These alliances show that leading academic-industrial bridges are concentrated in Japan and, to a lesser degree, Europe.
Ecosystem mapUS-first filing strategy, with China rapidly building a second front
The United States leads as the primary filing jurisdiction, followed by China and then the EPO, Japan, and WIPO. The China filing count signals that domestic Chinese institutions are actively building defensible positions, consistent with the presence of Tianjin University and several Chinese Academy of Sciences institutes in the applicant ranking. Applicants targeting global freedom-to-operate should treat US, China, and EPO as the minimum three-jurisdiction bundle.
US · CN · EP coreGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| National Institute of Information and Communications Technology | University of Tokushima | 9 |
| Nippon Telegraph & Telephone Corporation | Osaka University | 4 |
| National Institute of Information and Communications Technology | Tokai National Higher Education and Research System | 4 |
| University of Tokushima | Tokai National Higher Education and Research System | 4 |
| Nippon Telegraph & Telephone Corporation | Tohoku University | 3 |
| Ecole Polytechnique Federale de Lausanne (EPFL) | Purdue Research Foundation | 3 |
| Nippon Telegraph & Telephone Corporation | Tokyo Denki University | 2 |
| Nippon Telegraph & Telephone Corporation | Hidehiko Takara | 1 |
| Nippon Telegraph & Telephone Corporation | Takashi Go | 1 |
| Nippon Telegraph & Telephone Corporation | Mitsuki Shibahara | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
NTT and Honeywell lead from different technical angles; Caltech anchors academic depth
The top applicants share a common focus on optical modulation and laser technology but diverge sharply in application emphasis and recent trajectory — NTT leans into fiber-optic transmission, Honeywell into integrated photonics for sensing and navigation, and Caltech into nonlinear cavity physics.
Nippon Telegraph & Telephone Corp
NTT holds 53 patent families, the largest portfolio in scope, concentrated in optical control and modulation (G02F), laser systems (H01S), and fiber transmission (H04B). Its recent filing trend is classified as a new entrant in the most recent measurement window — an artifact of the publication lag on a historically large base rather than a new market entry. NTT also anchors the broadest co-filing network among all applicants, with documented joint filings alongside Osaka University, Tohoku University, and Tokyo Denki University.
families: 53Honeywell International Inc
Honeywell holds 51 patent families and is the most momentum-positive applicant in the ranking, with recent filings up +140% versus the prior comparable period — by far the largest growth rate among established filers. Its portfolio is concentrated in G02F (optical modulation, 38 families), G02B (optical elements, 15), and H01S (lasers, 15), a profile consistent with integrated photonic gyroscopes and precision navigation sensors. This trajectory indicates Honeywell is actively converting R&D into commercial-grade IP at a rate no peer is currently matching.
families: 51| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Honeywell International Inc | 24 | ▲ +140% |
| Nippon Telegraph & Telephone Corporation | 1 | ▲ new entrant |
| California Institute of Technology | 9 | ▲ new entrant |
| Regents of the University of California | 10 | ▲ new entrant |
| National Institute of Information and Communications Technology | 9 | ▲ new entrant |
| OEwaves Inc | 4 | ▲ new entrant |
| The General Hospital Corporation | 3 | ▼ -82% |
| University of Tokushima | 23 | ▲ new entrant |
Under-served application branches adjacent to the dominant photonics core
The IPC distribution reveals several branches where optical frequency comb technology has documented technical relevance but relatively sparse patent activity — potential entry points for applicants seeking less crowded IP terrain.
G01N · Material analysis and testing
This branch covers spectroscopic sensing and chemical analysis, where frequency combs offer wide-bandwidth, high-resolution fingerprinting of molecular species — a well-established capability in laboratory settings. Despite this technical fit, the branch accounts for only about 3% of the patent-record distribution relative to the dominant G02F core. Entry paths include dual-comb spectroscopy for gas detection, food safety, and environmental monitoring, where regulatory drivers and miniaturisation trends support commercial development. Applicants with existing G02F or H01S depth could extend into G01N with moderate incremental IP investment.
Search this in Eureka →G01J · Radiation and light measurement
Precision optical power and wavelength metrology is a natural application of comb-based absolute frequency references, yet G01J represents only about 2% of the patent-record distribution. The branch includes radiometry, photometry, and spectral analysis instrumentation. Given the strong concentration of existing comb IP in Japan and the US, and the presence of national metrology institutes among the applicants, this branch is plausibly accessible to instrument makers and metrology standards bodies that have not yet built dedicated comb-based IP positions.
Search this in Eureka →How leading applicants differ across technology routes
Strength of each leader across the main technology routes.
| Player | G02F 1 · Optical control & modulation | H01S 3 · Lasers & stimulated emission | G02B 6 · Optical elements & systems | H01S 5 · Lasers & stimulated emission | H04B 10 · Transmission (general) |
|---|---|---|---|---|---|
| Honeywell International Inc | Strong · 38 | Moderate · 15 | Moderate · 15 | Moderate · 14 | Absent |
| Nippon Telegraph & Telephone Corporation | Strong · 50 | Moderate · 16 | Absent | Absent | Emerging · 10 |
| National Institute of Information and Communications Technology | Strong · 34 | Absent | Absent | Absent | Strong · 25 |
| Regents of the University of California | Strong · 33 | Absent | Moderate · 13 | Moderate · 12 | Absent |
| California Institute of Technology | Strong · 38 | Moderate · 19 | Absent | Absent | Absent |
| The General Hospital Corporation | Absent | Strong · 26 | Strong · 24 | Absent | Absent |
| University of Tokushima | Strong · 27 | Absent | Absent | Absent | Strong · 14 |
Frequently asked questions
The landscape in scope contains 1,299 patent families. The United States is the leading filing jurisdiction, followed by China and the EPO.
Nippon Telegraph & Telephone Corp leads with 53 patent families, followed closely by California Institute of Technology at 52 and Honeywell International at 51. The three-way near-tie at the top means no single entity holds a commanding portfolio lead.
The field reached a maturity plateau. Annual filings peaked at 197 in 2021 and have eased to around 175 in 2022–2023. The multi-year window shows net growth of 5% versus the prior comparable period. Figures for 2024 and beyond are under-counted due to the 18-month publication lag.
G02F (optical control and modulation) is the dominant branch by a wide margin, reflecting the centrality of electro-optic and nonlinear modulation in comb generation. H01S (lasers and stimulated emission) and G02B (optical elements and systems) form the secondary core.
Honeywell International shows the strongest momentum among established filers, with recent filings up +140% versus the prior comparable period. University of Tokushima also shows a strong new-entrant signal with 23 recent families.
The most active co-filing pair is the National Institute of Information and Communications Technology and the University of Tokushima, with 9 jointly filed patent families. NTT functions as the broader ecosystem hub with documented co-filings alongside Osaka University, Tohoku University, and Tokyo Denki University. EPFL and Purdue Research Foundation form a notable international pairing with 3 joint families.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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