Optical Modulator Patent Landscape 2026
Nippon Telegraph & Telephone Corporation dominates a moderately concentrated field, holding the largest single portfolio among the top applicants. Annual filing volume peaked in 2019 and has eased since, placing the field in a post-peak phase where incumbents consolidate and selective entry points remain in adjacent semiconductor and laser branches.
NTT leads a moderately concentrated field with a clear tier gap to challengers
Nippon Telegraph & Telephone Corporation holds the top position with 169 patent records, nearly double the next-ranked filer, Fujitsu Ltd with 90 patent records. NEC Corporation and Cisco Technology Inc each follow with 75 patent records, forming a tight second tier.
The top five filers account for 28% of the combined total among the hundred largest filers, indicating moderate but not extreme concentration. A meaningful tier gap separates NTT from the rest, yet challengers such as Lumentum Technology UK Ltd (58 patent records) and Nokia Solutions & Networks OY (50 patent records) maintain competitive positions.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | NIPPON TELEGRAPH & TELEPHONE CORP | 169 | |
| 2 | Fujitsu Ltd | 90 | |
| 3 | NEC Corporation | 75 | |
| 4 | Cisco Technology Inc | 75 | |
| 5 | Lumentum Technology UK Ltd | 58 | |
| 6 | NOKIA SOLUTIONS & NETWORKS OY | 50 | |
| 7 | Rockley Photonics Ltd | 40 | |
| 8 | Huawei Technologies Co Ltd | 39 | |
| 9 | Sumitomo Electric Industries Ltd | 38 | |
| 10 | Ciena Corporation | 37 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Mitsubishi Electric Corporation | 36 | |
| 12 | Marvell Asia Pte Ltd | 34 | |
| 13 | Fraunhofer-Gesellschaft | 30 | |
| 14 | Taiwan Semiconductor Manufacturing Co Ltd | 29 | |
| 15 | Sumitomo Osaka Cement Co Ltd | 28 | |
| 16 | Fujitsu Optical Components Ltd | 25 | |
| 17 | NTT Electronics Corporation | 22 | |
| 18 | Massachusetts Institute of Technology | 22 | |
| 19 | Alcatel-Lucent SA | 22 | |
| 20 | Lucent Technologies Inc | 21 |
NTT’s lead, built primarily around core optical control and modulation work, gives it significant prior-art coverage in G02F; challengers have diversified into transmission (H04B) and multiplexing (H04J), suggesting they are optimising for system-level integration rather than competing directly on device fundamentals.
Filing counts for 2024 and especially 2025–2026 are subject to publication lag and should be treated as lower bounds; apparent recent softness does not necessarily reflect reduced inventive activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing volume peaked in 2019; G02F dominates the technology mix with visible adjacencies
The annual trend chart reveals a multi-year arc with a clear 2019 peak, while the technology composition chart shows how thoroughly G02F — optical control and modulation — anchors the corpus, with secondary clusters in transmission, optical elements, and lasers.
Annual filing trend
Filings climbed to a peak of 128 records in 2019, pulled back to the low-to-mid 80s through 2022, and have continued to ease through 2023–2024. The 2025 and 2026 bars are almost certainly under-counted due to publication lag and should not be read as indicative of the current pace of invention.
↗ Hover for values · click a bar to ask EurekaTechnology composition
G02F (optical control and modulation) is the dominant branch by a wide margin, reflecting the core device physics of the field. H04B (transmission), G02B (optical elements), and H01S (lasers and stimulated emission) form a meaningful secondary tier, while H01L (semiconductor devices) and H04J (multiplex communication) represent smaller but technically adjacent clusters worth monitoring for white-space entry.
↗ 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.
Semiconductor mach-zehnder-type optical modulator
In a semiconductor Mach-Zehnder modulator, when a phase modulator portion 113 and other passive areas (incident light waveguide path 111, a branch portion 112, a joint portion 114 and an output light waveguide path 115) are formed, a buffer layer 102, a waveguide layer 103 and a clad layer 104 are successively and selectively formed on a semiconductor… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Cascaded optical modulation system with high linea… | 208 |
| 2 | High-speed silicon-based electro-optic modulator | 200 |
| 3 | Polarization independent electro-optic modulator | 144 |
| 4 | Low voltage electro-optic modulator with integrate… | 138 |
| 5 | Optical modulator for an optical transmitter | 133 |
| 6 | Optical transmitter | 133 |
| 7 | Silicon double-injection electro-optic modulator w… | 127 |
| 8 | Optical semiconductor device | 124 |
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 observations — maturity, concentration, collaboration patterns, and geographic reach — together shape the risk-reward profile for any new entrant or incumbent expanding into optical modulator IP.
Post-peak field; selective white space remains in adjacent branches
The lifecycle stage is classified as Decline, with annual filings easing back from the 2019 peak of 128 records. Core G02F modulator IP is densely populated, reducing the value of incremental filings in the mainstream. Investors should focus on adjacent branches — particularly laser integration and semiconductor device architectures — where density is lower and cross-disciplinary claims can still differentiate.
Lifecycle: DeclineModerate concentration with a single dominant incumbent and a competitive second tier
NTT’s 169 patent records are roughly twice those of the nearest challenger, but the top five filers account for only 28% of the hundred largest filers’ combined total, leaving the mid-tier relatively open. The spread from rank 3 (NEC Corp, 75) through rank 10 (Ciena Corp, 37) is gradual, meaning a focused programme of 30–50 well-placed filings could realistically establish a mid-tier position.
Concentration: ModerateNTT–NTT Electronics and Rockley–Southampton are the most active co-filing pairs
The most frequent co-applicant pair is Nippon Telegraph & Telephone Corporation with NTT Electronics Corporation, collaborating on 25 joint records — consistent with intra-group integration of device and systems research. Rockley Photonics Ltd co-files with the University of Southampton (14 records) and the California Institute of Technology (6 records), signalling an academic-industry model for silicon photonics development. NEC Corporation co-files with Photonics Electronics Technology Research Association (7 records), reflecting a consortium approach common in Japan.
Collaboration: ActiveUS and EPO dominate; Asia-Pacific protection is patchy outside Japan
The United States leads jurisdiction coverage with 919 patent records, followed by Europe (EPO) with 366 and WIPO (PCT) with 167. Japan accounts for 109 records, and the United Kingdom separately holds 103. China has only 61 records and South Korea 13, despite both countries being major photonics manufacturing centres — suggesting either deliberate limitation of protection scope or under-filing by key applicants in those markets. Entrants targeting Asia-Pacific commercialisation may find geographic freedom to operate in China and Korea.
Geography: US-centricGo 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 |
|---|---|---|
| Nippon Telegraph & Telephone Corporation | NTT Electronics Corporation | 25 |
| Rockley Photonics Ltd | University of Southampton | 14 |
| NEC Corporation | Photonics Electronics Technology Research Association | 7 |
| Rockley Photonics Ltd | California Institute of Technology | 6 |
| Huawei Technologies Co Ltd | Interuniversity Microelectronics Centre (imec) | 3 |
| Nippon Telegraph & Telephone Corporation | Kagoshima University | 2 |
| Nippon Telegraph & Telephone Corporation | Tohoku University | 2 |
| Nippon Telegraph & Telephone Corporation | NTT Inc | 1 |
| Huawei Technologies Co Ltd | Futurewei Technologies Inc | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
NTT consolidates around core modulation; Sumitomo Electric emerges as a rising challenger
The two cards below profile the top-ranked incumbent and the most notable momentum story among the top applicants, using recent filing trends to assess trajectory.
Nippon Telegraph & Telephone Corporation
NTT holds 169 patent records, the largest portfolio in the field, concentrated almost entirely in G02F 1 (optical control and modulation, 181 records at the IPC-class level) with secondary positions in G02B 6 (optical elements, 18 records) and H01S 5 (lasers, 13 records). Its momentum trend shows a sharp contraction of -79% in recent filings versus the prior period, indicating the portfolio is maturing rather than expanding; NTT appears to be consolidating existing IP rather than staking new territory.
patent records: 169Sumitomo Electric Industries Ltd
Sumitomo Electric Industries Ltd holds 38 patent records and is classified as a new entrant in the recent filing window — a jump from a near-zero prior base — making it one of the more active risers in the current cycle. Its technology emphasis spans G02F 1 (38 records), H04B 10 (transmission, 9 records), and G02B 6 (optical elements, 6 records), reflecting a system-integration angle that complements its cable and component manufacturing base. This breadth across device and transmission IPC classes positions it as a credible mid-tier challenger for next-generation coherent transceiver applications.
patent records: 38| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Nippon Telegraph & Telephone Corporation | 10 | ▼ -79% |
| Fujitsu Ltd | 2 | ▲ new entrant |
| NEC Corporation | 4 | ▲ new entrant |
| Rockley Photonics Ltd | 2 | ▼ -87% |
| Huawei Technologies Co Ltd | 9 | ▲ new entrant |
| Sumitomo Electric Industries Ltd | 14 | ▲ new entrant |
| Mitsubishi Electric Corporation | 1 | ▲ new entrant |
| Nokia Solutions & Networks OY | 11 | ▬ 0% |
Under-served branches at the intersection of modulation, lasers, and semiconductor devices
Four IPC branches sit adjacent to the dominant G02F core with materially lower patent density; two stand out for their combination of technical relevance to next-generation modulators and realistic entry paths for organisations already active in photonics.
H01S · Lasers & stimulated emission — integrated source–modulator co-design
H01S carries 175 patent records against G02F’s dominant share, representing a sparsity share of 6% of all classified records. Integrated electro-absorption and directly modulated laser architectures require joint claims spanning both classes, yet filings that bridge H01S and G02F remain limited. Organisations with existing laser IP — particularly in semiconductor lasers (H01S 5) — could extend into co-designed transmitter modules with meaningful differentiation; the entry path is clearest for vertically integrated photonic component makers already holding H01S portfolios.
Search this in Eureka →H01L · Semiconductor devices — silicon photonics and heterogeneous integration
H01L holds 58 patent records, a sparsity share of just 2%, despite the commercial momentum of silicon photonics platforms where modulator performance is tightly coupled to semiconductor process node and device architecture. Claims that span G02F modulator structures and H01L device fabrication are sparse relative to the known engineering complexity of the space. Foundries and fabless photonics companies with CMOS or SiGe process knowledge — as suggested by Taiwan Semiconductor Manufacturing Co Ltd’s presence in the top-15 ranking — are positioned to file meaningfully in this branch.
Search this in Eureka →How leading applicants differ by technology route across G02F, H04B, and H01S
Route coverage across the main technology branches in the current evidence set.
| Player | G02F 1 · Optical control & modulation | H04B 10 · Transmission (general) | G02B 6 · Optical elements & systems | H01S 5 · Lasers & stimulated emission | H01S 3 · Lasers & stimulated emission |
|---|---|---|---|---|---|
| Nippon Telegraph & Telephone Corporation | Strong · 181 | Emerging · 11 | Emerging · 18 | Emerging · 13 | Emerging · 2 |
| Fujitsu Ltd | Strong · 96 | Strong · 53 | Absent | Emerging · 10 | Absent |
| NEC Corporation | Strong · 74 | Moderate · 21 | Emerging · 14 | Moderate · 15 | Absent |
| Rockley Photonics Ltd | Strong · 40 | Moderate · 9 | Absent | Absent | Absent |
| Sumitomo Electric Industries Ltd | Strong · 38 | Moderate · 9 | Absent | Absent | Emerging · 2 |
| Mitsubishi Electric Corporation | Strong · 36 | Moderate · 11 | Absent | Absent | Absent |
| Huawei Technologies Co Ltd | Strong · 39 | Absent | Absent | Absent | Absent |
Frequently asked questions
The analysis covers 750 patent families. Separately, the top-100 applicant ranking is measured in patent records, which can exceed the family count because a family may be classified under multiple IPC codes or jurisdictions.
Nippon Telegraph & Telephone Corporation leads with 169 patent records, approximately double the count of the next-ranked applicant, Fujitsu Ltd with 90 patent records.
Annual filings peaked in 2019 at 128 records, according to the trend data. Volume has eased since then, and the lifecycle stage is classified as Decline. Counts for 2025 and 2026 are subject to publication lag and understate current activity.
The United States leads with 919 patent records, followed by Europe (EPO) with 366 and WIPO (PCT) with 167. China holds 61 records and South Korea 13, which is low relative to their manufacturing significance in photonics.
The most frequent collaboration is between Nippon Telegraph & Telephone Corporation and NTT Electronics Corporation, with 25 joint records. Rockley Photonics Ltd co-files with the University of Southampton (14 records) and the California Institute of Technology (6 records).
H01S (lasers and stimulated emission) at a 6% share and H01L (semiconductor devices) at a 2% share of all classified records are the most notable under-served adjacent branches. H04J (multiplex communication) at 1% and G01J (radiation and light measurement) at 1% are also sparse relative to their technical proximity to the field.
Ready to map your own optical modulator patent landscape?
Join 18,000+ innovators using PatSnap Eureka to map any technology landscape: search 2B+ patents and papers, surface key assignees, and generate a report like this in minutes.
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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. PatSnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.