Fiber Laser Patents: Who Leads, Where Filings Are Cooling 2026
- Filings have already peaked. Annual filings rose to 116 in 2021 and have declined since, with the most recent full year sitting well below that peak — a sign the core claim space is filling rather than expanding.
- Momentum has stalled at the top. Several of the most active historical assignees, including IPG Photonics and Fujikura, show zero filings in the latest tracked year, and multiple others show year-on-year declines of 88-100%.
- The IPC spread is narrow. 1,623 of 1,713 records sit in H01S (lasers), with G02B optics a distant second at 492 — claim activity is concentrated in core laser architecture, not in adjacent integration fields.
Filing growth compares 2021 (116 records) with 2024 (58) — 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 1,713 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks patent families filed against beam quality, thermal management, mode instability, pump combiner and output power scaling claims within fiber laser and ytterbium fiber laser filings, classified under H01S3, G02B6 and H01S5. It spans filings from 2015 through the 2026 data cut-off, drawing on 1,713 published records and an equal number of distinct patent families, which means the family-level view here is not diluted by continuation filings.
Because publication typically lags filing by around 18 months, the last one to two years in any trend chart will read lower than the true filing rate — treat the most recent bars as a floor, not a ceiling.
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Filing trend and technology composition
Two views of the same 1,713-family dataset: how filing volume has moved year over year, and how that volume splits across the IPC subclasses the claims actually sit in.
A peak-and-decline filing curve
Filings climbed from 110 in 2017 to a peak of 116 in 2021, held near that level through the 2022 midpoint at 90, and have fallen off since — consistent with a technology whose core claim territory is now largely staked out rather than one still in an expansion phase.
Concentration in H01S, with optics as the only sizeable adjacency
H01S (lasers and stimulated emission) accounts for 1,623 of 1,713 records. G02B (optical elements and systems) is the only other subclass with meaningful volume at 492. Everything else — welding/brazing (B23K), modulation (G02F), transmission, radar/positioning, surgical and glass manufacture — sits under 120 records each, marking them as adjacent application areas rather than core filing territory.
Shares are the percentage of the 1,713 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Fiber Laser Technology with Eureka
This page is one run against one query. Ask Eureka your own question about fiber laser technology and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this space
US20100189138A1 — High Power Fiber Laser System With High Quality Beam
Filed by IPG Photonics, this application describes a fiber combiner built from fused single-mode fibers sized to hold numerical aperture low enough that the combined multimode output keeps a near-single-mode beam quality factor. A coreless termination block is fused to the output end specifically to reduce burning risk at multi-kilowatt combiner output levels.Dated 2010-07-29 — a foundational combiner architecture still referenced across later pump-combiner and output-power-scaling filings.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US8941912B2 | Ytterbium-doped optical fiber, fiber laser and fiber amplifier | 222 |
| 2 | US8363313B2 | Ytterbium-doped optical fiber, fiber laser, and fiber amplifier | 220 |
| 3 | US4829529A | Laser diode pumped fiber lasers with pump cavity | 173 |
| 4 | US6275512B1 | Mode-locked multimode fiber laser pulse source | 165 |
| 5 | US20050201429A1 | Laser source comprising amplifier and adaptive wavefront/polarization driver | 155 |
| 6 | US10003168B1 | Fiber laser with free-space components | 149 |
| 7 | US20050226278A1 | High power short pulse fiber laser | 141 |
| 8 | US20110305256A1 | Wavelength beam combining based laser pumps | 135 |
| 9 | US6366356B1 | High average power fiber laser system with high-speed, parallel wavefront sensor | 124 |
| 10 | US5291501A | Optical fibre with doped core and doped inner cladding, for use in an optical fibre laser | 122 |
Citation counts are drawn from within this searched corpus and skew toward older, foundational filings — read them as a signal of influence on later filers, not as a ranking of current commercial relevance.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns stand out once family counts, IPC spread and citation weight are read together.
The core architecture is largely staked out
Filings rose steadily to a 2021 peak of 116 and have trended down since, with 2022's midpoint already at 90. New entrants into core combiner and beam-quality claims are filing into denser prior art than filers did five years ago.
Almost all activity sits in one subclass
H01S captures 95% of records; G02B is the only other subclass with real volume. That leaves welding/brazing, modulation, transmission, positioning, surgical and glass-manufacturing applications comparatively open relative to core laser claims.
Historical leaders have gone quiet
Several of the most historically active assignees — including IPG Photonics, Fujikura, Northrop Grumman, nLIGHT and Elbit Systems Electro-Optics — show zero filings in the latest tracked year, several down 100% year-on-year. That does not mean these firms have exited the field; it more likely reflects portfolio maturity or a shift toward trade secret protection for incremental gains.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to fiber laser technology, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Fujikura Ltd. | Hokkaido University National University Corporation | 15 |
| IPG Photonics Corporation | SAMARTSEV IGOR | 9 |
| IPG Photonics Corporation | GAPONTSEV VALENTIN | 9 |
| IPG Photonics Corporation | YAGODKIN DIMITRI | 4 |
| IPG Photonics Corporation | GAPONTSEV VALENTIN P | 4 |
| IPG Photonics Corporation | FOMIN VALENTIN | 3 |
| Elbit Systems Electro-Optics Elop Ltd. | SACKS ZACHARY | 3 |
| Elbit Systems Electro-Optics Elop Ltd. | DAVID DORON | 3 |
Only 10 co-assignee pairs appear in the dataset. The strongest is Fujikura paired with Hokkaido University National University Corporation (15 shared families), followed by IPG Photonics paired separately with named individual inventors Samartsev and Gapontsev (9 each) — reflecting IPG's pattern of co-filing with its own founding scientists rather than external institutions.
Who holds the ground, and where it's open
Filing volume concentrates among a small set of assignees with long filing histories, but recent-year momentum has cooled across nearly all of them — an opening for new entrants willing to file into narrower, less-contested branches.
Fujikura's academic co-filing pattern
Fujikura's strongest co-assignee relationship is with Hokkaido University National University Corporation, the densest single co-assignee pair in the dataset. This points to sustained joint research on fiber materials rather than one-off collaboration.
IPG Photonics files close to its founders
IPG Photonics' two next-strongest co-assignee pairs are with individually named inventors, Samartsev and Gapontsev, rather than with outside institutions — consistent with a filing strategy built around a tight internal inventor base.
One of the few assignees still filing
Among tracked assignees, the National University of Defense Technology recorded 1 filing in the latest year — down 88% year-on-year, but notably still active while most peer assignees recorded zero.
| Assignee | Recent year | YoY |
|---|---|---|
| National University of Defense Technology | 1 | -88% |
| Fujikura Ltd. | 0 | — |
| IPG Photonics Corporation | 0 | — |
| Northrop Grumman Systems Corporation | 0 | -100% |
| nLIGHT, Inc. | 0 | -100% |
| Elbit Systems Electro-Optics Elop Ltd. | 0 | -100% |
| IMRA America, Inc. | 0 | — |
| Wuhan Raycus Fiber Laser Technologies Co., Ltd. | 0 | — |
Where to take this
The dataset points to a mature, concentrated core and a thinner set of adjacent branches. Two directions follow from that.
Check freedom-to-operate against the combiner core
Pump combiner and beam-quality claims are the densest part of this landscape, anchored by highly-cited filings like US8941912B2 and US20100189138A1. Any new combiner or high-power scaling design should be checked against this cluster before filing.
Run a freedom-to-operate check in EurekaExplore the under-claimed application branches
Welding integration, LIDAR positioning and surgical delivery each sit under 120 records despite drawing on the same core laser architecture. These branches carry lower prior-art density for a first-mover claim.
Explore white space in EurekaCommon questions about fiber laser patents
Filing activity concentrates among a small group of long-established assignees, with IPG Photonics and Fujikura among the most cited and most co-filed. IPG Photonics' filings frequently name its own founding scientists as co-inventors rather than outside institutions, while Fujikura's strongest collaboration is with Hokkaido University. That said, several of these historically dominant filers show zero filings in the most recent tracked year, so current leadership by volume does not necessarily map to current filing activity.
No — filings peaked at 116 in 2021 and have declined since, with the 2022 midpoint already down to 90. Because publication lags filing by roughly 18 months, the very latest years in the trend will always look lower than the eventual final count, but the multi-year decline predates that lag effect. Overall the pattern reads as a technology whose core claim space has matured rather than one still expanding.
H01S (lasers and stimulated emission) dominates, covering 1,623 of the 1,713 records in this dataset. G02B (optical elements and systems) is the only other subclass with substantial volume, at 492 records. Filers targeting adjacent application areas such as welding integration (B23K), modulation (G02F), or surgical delivery (A61B) are filing into much thinner prior art, each under 120 records.
This IPG Photonics filing from 2010 covers a fiber combiner design built from fused single-mode fibers with deliberately small numerical apertures, arranged so the combined multimode output keeps a beam quality close to single-mode performance, plus a coreless termination block fused to the output end to reduce burn risk at multi-kilowatt power. It is one of the most foundational combiner architectures in the corpus and is frequently referenced by later pump-combiner and power-scaling filings. Anyone designing a high-power combiner should review its specific claim scope for overlap before finalizing a design.
The clearest openings sit in application areas adjacent to the core laser architecture rather than in the architecture itself: welding and brazing integration, LIDAR-style positioning, surgical/diagnostic delivery, and glass preform manufacture for active fibers all show under 120 records each against a corpus of 1,713. These branches draw on the same underlying ytterbium fiber laser and beam-quality technology but have not yet built up the same claim density, making them more viable territory for a first-mover filing strategy.
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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.