Fiber Laser Optical Fiber Patents: Top Companies & Trends 2026
- Filing peaked in 2021 at 47 families and has declined since, with the 2022 midpoint at 30 — the growth phase for this exact claim space looks to be behind it.
- China now outpaces the United States at the receiving-office level, 151 filings to 134, with Europe and the WIPO/PCT route trailing well behind.
- Every tracked leading assignee shows zero filings in the latest year, including a -100% YoY drop for one major Chinese defense-research assignee — a sign of reporting lag more than of retreat.
Filing growth compares 2021 (47 records) with 2024 (17) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 433 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape tracks patent families at the intersection of fiber lasers and the rare-earth-doped, double-clad optical fiber that forms their gain medium — the claims covering ytterbium-doped, erbium-doped and other active fiber constructions under IPC classes H01S3/067, C03C13/04 and H01S3/16. The corpus spans 433 patent families filed between 2017 and the 2026 data cut-off.
Because publication lags filing by roughly eighteen months, the drop shown in the most recent one or two years is partly a reporting artefact rather than a genuine collapse in activity. The shape of the curve through 2021–2022, however, is real and worth reading carefully before deciding where to file next.
Filing trend and technology composition
Two views of the same 433-family corpus: how filing volume has moved year over year, and how those families distribute across IPC subclasses beyond the core laser classification.
A decade of rise and plateau
Filings grew from 16 in 2017 to a peak of 47 in 2021, held near that level through the 2022 midpoint of 30, and have tapered since — consistent with a claim space that filled up rather than one still opening.
Concentration in H01S, with meaningful spillover
All 433 families sit in H01S (lasers and stimulated emission) by definition of the search, but a substantial secondary cluster sits in G02B (optical elements, 73 records) and G02F (optical modulation, 27), with smaller but consistent activity in glass composition (C03C, 17) and glass manufacture (C03B, 10) — the fiber's material chemistry, not just its laser function, is separately claimed territory.
Shares are the percentage of the 433 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Fiber Laser Optical Fiber with Eureka
This page is one run against one query. Ask Eureka your own question about fiber laser optical fiber and every answer comes back with the patent numbers behind it.
Try EurekaThe patents every filer in this space has to read
Rare-earth-doped fiber and an optical fiber laser using the same (Fujikura)
A rare-earth-doped fiber includes a center core made of silica glass doped with a rare-earth element, a plurality of outer cores, an inner cladding around the center and outer cores, and an outer cladding around the inner cladding — with refractive indices stepping down at each layer, and at least one core positioned beyond 0.71r from the fiber center to shape mode behaviour.Filed by Fujikura, published 2004-12-30 — a structural claim over multi-core, multi-cladding rare-earth-doped fiber geometry that predates most of the corpus.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6324326B1 | Tapered fiber laser | 275 |
| 2 | US5513913A | Active multipoint fiber laser sensor | 242 |
| 3 | US5513194A | Stretched-pulse fiber laser | 236 |
| 4 | US6072811A | Integrated passively modelocked fiber lasers and method for constructing the same | 235 |
| 5 | US8941912B2 | Ytterbium-doped optical fiber, fiber laser and fiber amplifier | 222 |
| 6 | US8363313B2 | Ytterbium-doped optical fiber, fiber laser, and fiber amplifier | 220 |
| 7 | US5564832A | Birefringent active fiber laser sensor | 176 |
| 8 | US20020172486A1 | Single-polarization high power fiber lasers and amplifiers | 160 |
| 9 | US5689519A | Environmentally stable passively modelocked fiber laser pulse source | 153 |
| 10 | US10003168B1 | Fiber laser with free-space components | 149 |
Citation counts favour older, foundational filings within this searched corpus — they signal historical influence on the field, not current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three read-throughs of the trend, geography and citation data that matter more than the raw counts on their own.
The core claim space filled up between 2019 and 2022
The run-up to 47 filings in 2021, followed by a decline through the 2022 midpoint of 30, points to a technology that has moved from active claim-staking to consolidation. New entrants filing broad structural claims on doped-fiber geometry now face a denser prior-art field than filers did five years ago.
China has overtaken the US as the primary filing venue
With 151 filings at the Chinese receiving office against 134 in the United States, and 69 at the EPO plus 37 via PCT, enforcement and freedom-to-operate analysis increasingly has to start with Chinese-language prior art rather than treat it as secondary.
A small set of 1990s–2000s patents still anchors the field
Records like the tapered fiber laser and stretched-pulse fiber laser filings, each cited well over 200 times within this corpus, function as the reference points nearly every later filing has to distinguish itself from on structure or method.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to fiber laser optical fiber, with the prior art for and against each one.
Who holds the ground, and where it is still open
The leading assignees span US, Japanese and Chinese corporate and academic filers, but recent-year activity has gone quiet across nearly all of them — a pattern that reads as filing-to-publication lag rather than a genuine exit from the field.
Established filers have paused, not withdrawn
Corning, IMRA America, IPG Photonics, Fujikura and OFS Fitel all show zero filings in the latest year in this dataset. Given the 18-month publication lag, this most likely reflects filings still in the pipeline rather than a retreat from the technology.
A sharp reported drop from a defense-linked research institute
China's National University of Defense Technology shows a -100% year-over-year change alongside zero filings in the latest year. Whether this reflects a genuine pause or simply unpublished pending applications is not resolvable from filing data alone.
Collaboration is narrow and concentrated
Only ten co-assignee pairs appear across the corpus. The strongest, OFS Fitel with Vienna University of Technology, recurs five times; Corning's pairings with individual named inventors recur four times each, suggesting most collaboration here is inventor-driven rather than broad institutional partnership.
| Assignee | Recent year | YoY |
|---|---|---|
| Corning Incorporated | 0 | — |
| IMRA America, Inc. | 0 | — |
| IPG Photonics Corporation | 0 | — |
| Fujikura Ltd. | 0 | — |
| National University of Defense Technology | 0 | -100% |
| OFS Fitel, LLC | 0 | — |
| Coherent Scotland Limited | 0 | — |
| Fira Laser Limited | 0 | — |
Where to take this analysis
The filing and citation data point to specific next steps depending on whether the goal is freedom-to-operate, white-space filing, or competitive tracking.
Map claims against the five most-cited patents
Before drafting new claims on doped-fiber structure or mode-locking methods, check them against the tapered fiber laser, stretched-pulse fiber laser and integrated modelocked fiber laser filings that anchor this corpus's citation graph.
Explore prior art in EurekaWatch for pending Chinese filings
With China now the leading receiving office and several major assignees showing a zero-filing latest year, pending but unpublished applications from Chinese entities are the biggest source of near-term surprise in this space.
Track assignee activity in EurekaTest claims in the thinner IPC branches
The glass-composition (C03C) and material-analysis (G01N) overlaps carry far fewer filings than the core H01S cluster, which may leave room for narrowly drafted claims that the dominant assignees have not staked out.
Run a white-space search in EurekaCommon questions about fiber laser optical fiber patents
The corpus shows a concentrated group of corporate and academic filers, including Corning, IMRA America, IPG Photonics, Fujikura and OFS Fitel, alongside Chinese academic and defense-linked institutions such as the National University of Defense Technology. None of these leading assignees show filings in the most recent tracked year, which given the roughly 18-month publication lag likely reflects pending applications rather than an actual halt in R&D. Anyone assessing this field should treat current leadership as a snapshot of the 2019–2022 filing wave rather than of activity happening right now.
Filings rose from 16 in 2017 to a peak of 47 in 2021, then eased to 30 by the 2022 midpoint and lower afterward. This pattern is typical of a claim space that filled up: once foundational structural and material claims on doped-fiber geometry are staked out, later filers face denser prior art and narrower room for broad claims. The apparent drop in 2025 and 2026 should also be read alongside publication lag, since the newest filings in any patent dataset are always undercounted at the time of the cut-off.
China leads as a receiving office with 151 filings, ahead of the United States at 134, with the European Patent Office at 69 and the WIPO/PCT route at 37. This shift matters for freedom-to-operate work: a search strategy built only around US and European prior art will miss the largest single national filing pool for this technology. Australia and Canada are marginal by comparison, at 8 and 6 filings respectively.
US20040264513A1, filed by Fujikura, claims a rare-earth-doped fiber structure with a center core and multiple outer cores surrounded by inner and outer cladding layers of stepped-down refractive index, with at least one core positioned beyond a specific fractional radius from the fiber center. This is a structural claim over multi-core, multi-cladding doped fiber geometry, not a narrow material or process claim, so it constrains anyone using a similar layered-core arrangement to shape mode behaviour in a rare-earth-doped gain fiber. Designs that use a single-core structure, a different cladding sequence, or place all active cores well inside the 0.71r boundary sit outside its literal scope, but should still be checked against the claim language directly rather than the abstract alone.
The IPC composition data shows heavy concentration in H01S (lasers) with a meaningful secondary cluster in G02B and G02F (optics and modulation), but comparatively thin coverage in C03C (glass composition, 17 records), C03B (glass manufacture, 10) and G01N (material analysis, 10). These thinner branches — particularly glass composition claims specific to gain fiber, and in-fiber material testing methods — carry lower filing density relative to the core cluster and are worth a targeted prior-art search before assuming the space is closed.
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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.
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.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.