Photodetector Patent Landscape 2026
Photodetector Patent Landscape in 2026
The photodetector patent field is Japan-dominated and moderately concentrated, with Fujitsu, Sumitomo Electric, and NEC collectively anchoring the top tier while the United States is the primary filing jurisdiction. Annual volume peaked in 2020 and has since eased, consistent with a maturing field where incremental optical-systems work now outpaces foundational device invention.
Fujitsu leads a Japan-heavy top tier in a moderately concentrated field
Fujitsu ranks first among the hundred largest filers with 2,669 patent records, followed closely by Sumitomo Electric Industries at 2,302 and NEC Corporation at 2,124. The top five collectively hold a 20% share of the hundred largest filers’ combined total, signaling moderate rather than extreme concentration.
A clear Japanese industrial tier — Fujitsu, Sumitomo Electric, NEC, NTT, and Panasonic Holdings — separates itself from a second tier that includes Canon, Mitsubishi Electric, Sharp, Sony, and Hitachi, with Western and Korean entrants (Intel, Samsung, IBM, Huawei) occupying the middle ranks.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Fujitsu Limited | 2,669 | |
| 2 | Sumitomo Electric Industries, Ltd. | 2,302 | |
| 3 | NEC Corporation | 2,124 | |
| 4 | NIPPON TELEGRAPH & TELEPHONE CORP | 1,884 | |
| 5 | Panasonic Holdings Corporation | 1,484 | |
| 6 | Canon Inc. | 1,457 | |
| 7 | Mitsubishi Electric Corporation | 1,397 | |
| 8 | Sharp Corporation | 1,393 | |
| 9 | Sony Group Corporation | 1,122 | |
| 10 | Hitachi, Ltd. | 1,112 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Intel Corporation | 1,085 | |
| 12 | Samsung Electronics Co., Ltd. | 1,065 | |
| 13 | Toshiba Corporation | 989 | |
| 14 | II-VI Incorporated (now Coherent Corp.) | 960 | |
| 15 | AT&T CORP | 924 | |
| 16 | Furukawa Electric Co., Ltd. | 898 | |
| 17 | IBM Corporation | 871 | |
| 18 | Huawei Technologies Co., Ltd. | 832 | |
| 19 | Ricoh Co., Ltd. | 753 | |
| 20 | Corning Incorporated | 672 |
The dominance of Japanese telecoms-equipment and electronics firms reflects the field’s roots in fiber-optic communications; the presence of Intel, Samsung, and Huawei in the ranking indicates more recent investment in silicon photonics and datacom applications.
Filing counts for 2024 and 2025 are materially under-counted due to standard patent-publication lag and should not be treated as indicators of current industry activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity peaked in 2020; optical elements dominate the technology mix
The filing trend reveals a field that built steadily through the late 2010s before reaching a 2020 peak, while the IPC composition chart shows G02B optical elements and H01S laser/stimulated-emission work together account for the largest share of classified activity.
Annual filing trend
Annual filings grew from 739 in 2017 to a peak of 882 in 2020, then declined through 2022 and 2023. Figures for 2024 and especially 2025–2026 are substantially under-counted due to publication lag and must not be read as a continuation of the decline.
↗ Hover for values · click a bar to ask EurekaTechnology composition
G02B (optical elements and systems) is the dominant branch, reflecting the field’s strong fiber-optic and waveguide heritage. H01S (lasers and stimulated emission) ranks second, underscoring the tight coupling between photodetection and coherent light sources. H01L (semiconductor devices) and G02F (optical control and modulation) form the next tier, pointing to integrated photonic and electro-optic device work.
↗ 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.
Photodetector module with a photodiode electricall…
A photodetector module contains a package, a photodiode, a preamplifier, a bypass capacitor, a cap with a lens and a sleeve. A parallel plate capacitor is used as the bypass capacitor. The parallel plate capacitor is mounted at the center of the package. The photodiode is stuck on the parallel plate capacitor. Since the photodiode is piled upon the… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Arrays of optical confinements and uses thereof | 2,098 |
| 2 | Apparatus and methods for optical analysis of mole… | 998 |
| 3 | Illumination system for nonemissive electronic dis… | 852 |
| 4 | Optical biosensor system | 693 |
| 5 | Apparatus and method for analysis of molecules | 684 |
| 6 | LED luminaire with electronically adjusted color b… | 634 |
| 7 | LED luminaire with electrically adjusted color bal… | 594 |
| 8 | Optical analysis of molecules | 522 |
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 patent structure means for R&D investment decisions
The combination of a maturing lifecycle, moderate concentration, active cross-firm collaboration, and a US-dominant filing geography shapes where new entrants can realistically differentiate.
Field is in decline from a 2020 peak
The lifecycle stage is Decline: annual filings eased back from the 2020 peak of 882 records and have continued to contract through 2022–2023. This pattern suggests that core photodetector architectures are well-documented and incremental improvements dominate new filings. R&D teams should weigh whether to pursue differentiation in adjacent, less-crowded branches rather than competing head-on in G02B optical elements.
Lifecycle: DeclineModerate concentration with a strong Japanese industrial bloc
The top five filers account for 20% of the hundred largest filers’ combined total — moderate enough that challengers from outside Japan retain room to build meaningful positions. The gap between rank-1 Fujitsu (2,669 patent records) and rank-6 Canon (1,457) is substantial, but the second tier remains competitive. New entrants focused on silicon photonics or LIDAR applications may find the existing portfolios less directly relevant to their specific sub-segments.
Concentration: ModerateFujitsu and Sumitomo Electric are the most active co-filers
The most active collaboration pair is Fujitsu and the Photonics Electronics Technology Research Association (16 joint records), reflecting Japan’s government-backed consortium model. Sumitomo Electric co-files frequently with AutoNetworks Technologies, Sumitomo Wiring Systems, and NHK Spring (14 records each), indicating automotive-optical applications. Samsung Electronics co-files with IMEC (14 records) and with Gwangju Institute of Science and Technology (4 records), pointing to its engagement with European and Korean academic research on advanced device physics.
Collaboration: ActiveUS is the primary protection market; Europe and PCT lag significantly
The United States leads all jurisdictions by a wide margin with 12,235 patent records. Europe (EPO) is a distant second at 3,717, followed by WIPO (PCT) at 1,868. Canada, the United Kingdom, and Australia represent smaller but commercially significant markets. Singapore at 116 records reflects selective Asia-Pacific filings, likely tied to datacom hub activity. Innovators entering the space should prioritize US prosecution while evaluating EPO coverage for European telecom and industrial markets.
Geography: US-ledGo 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 |
|---|---|---|
| Fujitsu Limited | Photonics Electronics Technology Research Association | 16 |
| Sumitomo Electric Industries, Ltd. | AutoNetworks Technologies, Ltd. | 14 |
| Sumitomo Electric Industries, Ltd. | Sumitomo Wiring Systems, Ltd. | 14 |
| Samsung Electronics Co., Ltd. | IMEC (Interuniversity Microelectronics Centre) | 14 |
| Sumitomo Electric Industries, Ltd. | NHK Spring Co., Ltd. | 10 |
| Samsung Electronics Co., Ltd. | INT CENT FOR QUANTUM OPTICS & QUANTUM TECH LLC | 8 |
| Sumitomo Electric Industries, Ltd. | Nippon Telegraph and Telephone Corporation | 6 |
| Sumitomo Electric Industries, Ltd. | Sumitomo Electric Device Innovations, Inc. | 4 |
| Fujitsu Limited | NEC Corporation | 4 |
| Samsung Electronics Co., Ltd. | Gwangju Institute of Science and Technology | 4 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Fujitsu and Sumitomo Electric lead by volume; momentum is diverging
Both leaders built their positions on optical fiber and communications infrastructure; their recent filing trajectories suggest consolidation rather than accelerating investment.
Fujitsu Limited
Fujitsu holds the top position with 2,669 patent records, concentrated in G02B optical elements and systems, H04B transmission, and G02F optical control and modulation — a profile consistent with integrated fiber-optic transceiver and photonic interconnect work. Recent filing activity is down 60% versus the prior three-year period, indicating that Fujitsu is consolidating its existing portfolio rather than accelerating new coverage.
patent records: 2,669Sumitomo Electric Industries
Sumitomo Electric ranks second with 2,302 patent records, with its strongest focus in G02B optical elements, H01S lasers and stimulated emission, and H01L semiconductor devices — a broader device-physics portfolio than Fujitsu’s more transmission-centric emphasis. Its recent filing activity is flagged as a new entrant in the momentum data, suggesting a renewed or refocused filing program at a modest recent volume of 6 records in the measured window.
patent records: 2,302| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Sumitomo Electric Industries, Ltd. | 6 | ▲ new entrant |
| Fujitsu Limited | 6 | ▼ -60% |
| Intel Corporation | 19 | ▼ -24% |
| Samsung Electronics Co., Ltd. | 27 | ▼ -54% |
| Infinera Corporation | 10 | ▼ -50% |
| Canon Inc. | 2 | ▲ new entrant |
Under-served branches adjacent to the dominant optical-systems core
Several IPC branches appear at lower relative share within this corpus despite plausible technical and commercial relevance to photodetection; they represent observations of relative sparsity rather than confirmed market gaps.
G01J · Radiation & light measurement
G01J (radiation and light measurement) holds a 3% share of classified records in this corpus — sparse relative to G02B and H01S. This branch directly covers photodetector-based radiometry, photometry, and spectrometry instruments. The under-representation relative to the underlying device work in G02B may indicate that measurement-system-level claims are filed under more specific application codes, or that this constitutes a genuine filing gap for companies building calibration, sensing, or analytical instrument applications on top of photodetector hardware.
Search this in Eureka →G01N · Material analysis & testing
G01N (material analysis and testing) accounts for a 2% share in this corpus, despite the prominence of optical biosensor and molecular-analysis patents among the most-cited works in the field. This sparsity suggests that analytical-instrument applications of photodetectors — including lab-on-chip, flow cytometry, and spectroscopic sensing — may be filed primarily under life-science or instrument-specific classifications rather than under a photodetector framing. An entrant with a sensor-integration angle could explore whether this branch represents a differentiation path.
Search this in Eureka →How leading applicants differ across technology routes
Strength of each leader across the main technology routes.
| Player | G02B 6 · Optical elements & systems | H01S 5 · Lasers & stimulated emission | G02F 1 · Optical control & modulation | H04B 10 · Transmission (general) | H01L 31 · Semiconductor devices |
|---|---|---|---|---|---|
| Infinera Corporation | Strong · 240 | Strong · 175 | Strong · 133 | Strong · 192 | Moderate · 55 |
| Sumitomo Electric Industries, Ltd. | Strong · 344 | Strong · 177 | Absent | Moderate · 73 | Moderate · 139 |
| Fujitsu Limited | Strong · 198 | Strong · 120 | Strong · 162 | Strong · 177 | Moderate · 60 |
| IBM Corporation | Strong · 251 | Moderate · 100 | Absent | Moderate · 52 | Moderate · 120 |
| AT&T Corp. | Strong · 118 | Strong · 101 | Moderate · 59 | Strong · 94 | Strong · 63 |
| Finisar Corporation | Strong · 131 | Strong · 165 | Absent | Strong · 97 | Absent |
| Samsung Electronics Co., Ltd. | Strong · 123 | Strong · 110 | Strong · 98 | Absent | Moderate · 49 |
Frequently asked questions
The corpus covers 6,215 patent families. Filing counts by jurisdiction and IPC branch are reported at the patent-record level and can exceed this total because a single family may receive protection in multiple countries or be classified under multiple IPC codes.
Fujitsu Limited leads with 2,669 patent records among the top hundred filers, ahead of Sumitomo Electric Industries at 2,302 and NEC Corporation at 2,124. The top five collectively hold 20% of the hundred largest filers’ combined total.
The field is assessed as Decline: annual filings peaked at 882 records in 2020 and have eased since. Note that 2024 and 2025 data are materially under-counted due to publication lag, so the pace of contraction in the most recent years cannot be confirmed from current evidence.
G02B (optical elements and systems) is the single largest branch, reflecting the field’s fiber-optic heritage. H01S (lasers and stimulated emission) ranks second, followed by G02F (optical control and modulation), H04B (transmission), and H01L (semiconductor devices).
The United States is the primary protection market with 12,235 patent records. Europe (EPO) ranks second at 3,717, followed by WIPO (PCT) at 1,868, Canada at 758, the United Kingdom at 718, and Australia at 576.
The most active co-filing pair is Fujitsu and the Photonics Electronics Technology Research Association with 16 joint records. Sumitomo Electric co-files with AutoNetworks Technologies and Sumitomo Wiring Systems (14 records each), and Samsung Electronics co-files with IMEC (14 records). These collaborations reflect Japan’s consortium-based R&D model and Samsung’s engagement with European academic photonics research.
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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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